diff --git a/.eslintrc.js b/.eslintrc.js
index 15341a5273..e42437abd1 100644
--- a/.eslintrc.js
+++ b/.eslintrc.js
@@ -41,5 +41,23 @@ module.exports = {
         'import/no-extraneous-dependencies': 'off',
       },
     },
+    {
+      files: ['packages/**/*.js'],
+      rules: {
+        'import/no-commonjs': 'error',
+      },
+    },
+    {
+      files: [
+        'packages/metro/src/integration_tests/**/*.js',
+        'packages/metro-runtime/**/*.js',
+        '**/__tests__/**/*.js',
+        '**/__mocks__/**/*.js',
+        '**/__fixtures__/**/*.js',
+      ],
+      rules: {
+        'import/no-commonjs': 'off',
+      },
+    },
   ],
 };
diff --git a/packages/buck-worker-tool/src/CommandFailedError.js b/packages/buck-worker-tool/src/CommandFailedError.js
index 221a66f1c5..fa40aca5b8 100644
--- a/packages/buck-worker-tool/src/CommandFailedError.js
+++ b/packages/buck-worker-tool/src/CommandFailedError.js
@@ -9,13 +9,11 @@
  * @oncall react_native
  */
 
-'use strict';
-
 /**
  * Thrown to indicate the command failed and already output relevant error
  * information on the console.
  */
-class CommandFailedError extends Error {
+export default class CommandFailedError extends Error {
   constructor() {
     super(
       'The Buck worker-tool command failed. Diagnostics should have ' +
@@ -23,5 +21,3 @@ class CommandFailedError extends Error {
     );
   }
 }
-
-module.exports = CommandFailedError;
diff --git a/packages/buck-worker-tool/src/profiling.js b/packages/buck-worker-tool/src/profiling.js
index 0b1d6b1e81..3903bc0b0e 100644
--- a/packages/buck-worker-tool/src/profiling.js
+++ b/packages/buck-worker-tool/src/profiling.js
@@ -9,9 +9,7 @@
  * @oncall react_native
  */
 
-'use strict';
-
-const fs = require('fs');
+import fs from 'fs';
 
 let currentInspectorSession;
 let isProfiling = false;
@@ -20,13 +18,14 @@ function getInspectorSession() {
   if (currentInspectorSession) {
     return currentInspectorSession;
   }
+  // eslint-disable-next-line import/no-commonjs
   const inspector = require('inspector');
   currentInspectorSession = new inspector.Session();
   currentInspectorSession.connect();
   return currentInspectorSession;
 }
 
-async function startProfiling() {
+export async function startProfiling() {
   if (isProfiling) {
     return;
   }
@@ -37,7 +36,7 @@ async function startProfiling() {
   isProfiling = true;
 }
 
-async function stopProfilingAndWrite(workerName: ?string) {
+export async function stopProfilingAndWrite(workerName: ?string) {
   if (!isProfiling) {
     return;
   }
@@ -56,8 +55,3 @@ async function stopProfilingAndWrite(workerName: ?string) {
   );
   isProfiling = false;
 }
-
-module.exports = {
-  stopProfilingAndWrite,
-  startProfiling,
-};
diff --git a/packages/buck-worker-tool/src/third-party/JSONStream.js b/packages/buck-worker-tool/src/third-party/JSONStream.js
index 3081dfa472..8c4ba97e7f 100644
--- a/packages/buck-worker-tool/src/third-party/JSONStream.js
+++ b/packages/buck-worker-tool/src/third-party/JSONStream.js
@@ -5,6 +5,8 @@
  * LICENSE file in the root directory of this source tree.
  */
 
+/* eslint-disable import/no-commonjs */
+
 /**
  * Copyright (c) 2011 Dominic Tarr.
  * Based on the JSONStream package: https://github.com/dominictarr/JSONStream
diff --git a/packages/buck-worker-tool/src/worker-tool.js b/packages/buck-worker-tool/src/worker-tool.js
index 369020f184..f39b0a1a75 100644
--- a/packages/buck-worker-tool/src/worker-tool.js
+++ b/packages/buck-worker-tool/src/worker-tool.js
@@ -9,16 +9,14 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {Writable} from 'stream';
 
-const {startProfiling, stopProfilingAndWrite} = require('./profiling');
-const JSONStream = require('./third-party/JSONStream');
-const {Console} = require('console');
-const duplexer = require('duplexer');
-const fs = require('fs');
-const invariant = require('invariant');
+import {startProfiling, stopProfilingAndWrite} from './profiling';
+import JSONStream from './third-party/JSONStream';
+import {Console} from 'console';
+import duplexer from 'duplexer';
+import fs from 'fs';
+import invariant from 'invariant';
 
 export type Command = (
   argv: Array<string>,
@@ -294,4 +292,4 @@ const success = (id: number) => ({
   exit_code: 0 as const,
 });
 
-module.exports = {buckWorker};
+export {buckWorker};
diff --git a/packages/metro-babel-register/src/babel-register.js b/packages/metro-babel-register/src/babel-register.js
index 661f17c5c5..3a79ac88ae 100644
--- a/packages/metro-babel-register/src/babel-register.js
+++ b/packages/metro-babel-register/src/babel-register.js
@@ -9,6 +9,8 @@
  * @oncall react_native
  */
 
+/* eslint-disable import/no-commonjs */
+
 'use strict';
 
 /*::
diff --git a/packages/metro-babel-register/src/plugins/babel-plugin-metro-replace-ts-require-assignment.js b/packages/metro-babel-register/src/plugins/babel-plugin-metro-replace-ts-require-assignment.js
index 03823be755..89ef7a67ab 100644
--- a/packages/metro-babel-register/src/plugins/babel-plugin-metro-replace-ts-require-assignment.js
+++ b/packages/metro-babel-register/src/plugins/babel-plugin-metro-replace-ts-require-assignment.js
@@ -8,6 +8,8 @@
  * @oncall react_native
  */
 
+/* eslint-disable import/no-commonjs */
+
 'use strict';
 
 // Replace `import thing = require('thing')` with `const thing = require('thing')` which allows us to keep CJS semantics
diff --git a/packages/metro-babel-transformer/src/index.js b/packages/metro-babel-transformer/src/index.js
index 47e7afad11..7cbe2d1813 100644
--- a/packages/metro-babel-transformer/src/index.js
+++ b/packages/metro-babel-transformer/src/index.js
@@ -9,12 +9,10 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {BabelCoreOptions, BabelFileMetadata} from '@babel/core';
 
-const {parseSync, transformFromAstSync} = require('@babel/core');
-const nullthrows = require('nullthrows');
+import {parseSync, transformFromAstSync} from '@babel/core';
+import nullthrows from 'nullthrows';
 
 export type CustomTransformOptions = {
   [string]: mixed,
@@ -81,7 +79,12 @@ export type BabelTransformer = $ReadOnly<{
   getCacheKey?: () => string,
 }>;
 
-function transform({filename, options, plugins, src}: BabelTransformerArgs) {
+function transform({
+  filename,
+  options,
+  plugins,
+  src,
+}: BabelTransformerArgs): ReturnType<BabelTransformer['transform']> {
   const OLD_BABEL_ENV = process.env.BABEL_ENV;
   process.env.BABEL_ENV = options.dev
     ? 'development'
@@ -105,8 +108,8 @@ function transform({filename, options, plugins, src}: BabelTransformerArgs) {
       // You get this behavior by default when using Babel's `transform` method directly.
       cloneInputAst: false,
     };
-    const sourceAst: BabelNodeFile = options.hermesParser
-      ? // $FlowFixMe[incompatible-exact]
+    const sourceAst = options.hermesParser
+      ? // eslint-disable-next-line import/no-commonjs
         require('hermes-parser').parse(src, {
           babel: true,
           sourceType: babelConfig.sourceType,
@@ -114,6 +117,7 @@ function transform({filename, options, plugins, src}: BabelTransformerArgs) {
       : parseSync(src, babelConfig);
 
     const transformResult = transformFromAstSync<MetroBabelFileMetadata>(
+      // $FlowFixMe[incompatible-call] BabelFile vs BabelNodeFile
       sourceAst,
       src,
       babelConfig,
@@ -130,6 +134,9 @@ function transform({filename, options, plugins, src}: BabelTransformerArgs) {
   }
 }
 
-module.exports = ({
-  transform,
-}: BabelTransformer);
+// Type check exports
+/*::
+({transform}) as BabelTransformer;
+*/
+
+export {transform};
diff --git a/packages/metro-cache-key/src/index.js b/packages/metro-cache-key/src/index.js
index 62c56be0a4..e6329e74b5 100644
--- a/packages/metro-cache-key/src/index.js
+++ b/packages/metro-cache-key/src/index.js
@@ -9,12 +9,10 @@
  * @oncall react_native
  */
 
-'use strict';
+import crypto from 'crypto';
+import fs from 'fs';
 
-const crypto = require('crypto');
-const fs = require('fs');
-
-function getCacheKey(files: Array<string>): string {
+export function getCacheKey(files: Array<string>): string {
   return files
     .reduce(
       (hash, file) => hash.update('\0', 'utf8').update(fs.readFileSync(file)),
@@ -22,5 +20,3 @@ function getCacheKey(files: Array<string>): string {
     )
     .digest('hex');
 }
-
-module.exports = {getCacheKey};
diff --git a/packages/metro-cache/src/Cache.js b/packages/metro-cache/src/Cache.js
index 58c8d8dae6..bb15396116 100644
--- a/packages/metro-cache/src/Cache.js
+++ b/packages/metro-cache/src/Cache.js
@@ -9,11 +9,9 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {CacheStore} from 'metro-cache';
 
-const {Logger} = require('metro-core');
+import {Logger} from 'metro-core';
 
 /**
  * Main cache class. Receives an array of cache instances, and sequentially
@@ -22,7 +20,7 @@ const {Logger} = require('metro-core');
  *
  * All get/set operations are logged via Metro's logger.
  */
-class Cache<T> {
+export default class Cache<T> {
   _stores: $ReadOnlyArray<CacheStore<T>>;
 
   _hits: WeakMap<Buffer, CacheStore<T>>;
@@ -138,5 +136,3 @@ class Cache<T> {
     return this._stores.length === 0;
   }
 }
-
-module.exports = Cache;
diff --git a/packages/metro-cache/src/__tests__/Cache-test.js b/packages/metro-cache/src/__tests__/Cache-test.js
index 438d54445b..8be9dcfd74 100644
--- a/packages/metro-cache/src/__tests__/Cache-test.js
+++ b/packages/metro-cache/src/__tests__/Cache-test.js
@@ -29,7 +29,7 @@ describe('Cache', () => {
 
   beforeEach(() => {
     Logger = require('metro-core').Logger;
-    Cache = require('../Cache');
+    Cache = require('../Cache').default;
 
     Logger.on('log', item => {
       log.push({
diff --git a/packages/metro-cache/src/__tests__/stableHash-test.js b/packages/metro-cache/src/__tests__/stableHash-test.js
index dee3c46bd9..0ddb3d07c8 100644
--- a/packages/metro-cache/src/__tests__/stableHash-test.js
+++ b/packages/metro-cache/src/__tests__/stableHash-test.js
@@ -8,9 +8,7 @@
  * @oncall react_native
  */
 
-'use strict';
-
-const stableHash = require('../stableHash');
+import stableHash from '../stableHash';
 
 describe('stableHash', () => {
   test('ensures that the hash implementation supports switched order properties', () => {
diff --git a/packages/metro-cache/src/index.js b/packages/metro-cache/src/index.js
index 7fe8c51f86..60226929d7 100644
--- a/packages/metro-cache/src/index.js
+++ b/packages/metro-cache/src/index.js
@@ -9,23 +9,22 @@
  * @oncall react_native
  */
 
-'use strict';
-
-const Cache = require('./Cache');
-const stableHash = require('./stableHash');
-const AutoCleanFileStore = require('./stores/AutoCleanFileStore');
-const FileStore = require('./stores/FileStore');
-const HttpGetStore = require('./stores/HttpGetStore');
-const HttpStore = require('./stores/HttpStore');
+import Cache from './Cache';
+import stableHash from './stableHash';
+import AutoCleanFileStore from './stores/AutoCleanFileStore';
+import FileStore from './stores/FileStore';
+import HttpGetStore from './stores/HttpGetStore';
+import HttpStore from './stores/HttpStore';
 
 export type {Options as FileOptions} from './stores/FileStore';
 export type {Options as HttpOptions} from './stores/HttpStore';
 export type {CacheStore} from './types';
 
-module.exports.AutoCleanFileStore = AutoCleanFileStore;
-module.exports.Cache = Cache;
-module.exports.FileStore = FileStore;
-module.exports.HttpGetStore = HttpGetStore;
-module.exports.HttpStore = HttpStore;
-
-module.exports.stableHash = stableHash;
+export {
+  AutoCleanFileStore,
+  Cache,
+  FileStore,
+  HttpGetStore,
+  HttpStore,
+  stableHash,
+};
diff --git a/packages/metro-cache/src/stableHash.js b/packages/metro-cache/src/stableHash.js
index 5f181b7ac6..eb1b353459 100644
--- a/packages/metro-cache/src/stableHash.js
+++ b/packages/metro-cache/src/stableHash.js
@@ -9,12 +9,10 @@
  * @oncall react_native
  */
 
-'use strict';
+import crypto from 'crypto';
+import canonicalize from 'metro-core/private/canonicalize';
 
-const crypto = require('crypto');
-const canonicalize = require('metro-core/private/canonicalize');
-
-function stableHash(value: mixed): Buffer {
+export default function stableHash(value: mixed): Buffer {
   return (
     crypto
       .createHash('md5')
@@ -25,5 +23,3 @@ function stableHash(value: mixed): Buffer {
       .digest('buffer')
   );
 }
-
-module.exports = stableHash;
diff --git a/packages/metro-cache/src/stores/AutoCleanFileStore.js b/packages/metro-cache/src/stores/AutoCleanFileStore.js
index 27978fa46a..effde7df9b 100644
--- a/packages/metro-cache/src/stores/AutoCleanFileStore.js
+++ b/packages/metro-cache/src/stores/AutoCleanFileStore.js
@@ -8,13 +8,11 @@
  * @flow
  */
 
-'use strict';
-
 import type {Options} from './FileStore';
 
-const FileStore = require('./FileStore');
-const fs = require('fs');
-const path = require('path');
+import FileStore from './FileStore';
+import fs from 'fs';
+import path from 'path';
 
 type CleanOptions = {
   ...Options,
@@ -59,7 +57,7 @@ function get<T>(property: ?T, defaultValue: T): T {
 /**
  * A FileStore that cleans itself up in a given interval
  */
-class AutoCleanFileStore<T> extends FileStore<T> {
+export default class AutoCleanFileStore<T> extends FileStore<T> {
   _intervalMs: number;
   _cleanupThresholdMs: number;
   _root: string;
@@ -103,5 +101,3 @@ class AutoCleanFileStore<T> extends FileStore<T> {
     this._scheduleCleanup();
   }
 }
-
-module.exports = AutoCleanFileStore;
diff --git a/packages/metro-cache/src/stores/FileStore.js b/packages/metro-cache/src/stores/FileStore.js
index a0639f27bb..fc37b558da 100644
--- a/packages/metro-cache/src/stores/FileStore.js
+++ b/packages/metro-cache/src/stores/FileStore.js
@@ -8,10 +8,8 @@
  * @flow
  */
 
-'use strict';
-
-const fs = require('fs');
-const path = require('path');
+import fs from 'fs';
+import path from 'path';
 
 const NULL_BYTE = 0x00;
 const NULL_BYTE_BUFFER = Buffer.from([NULL_BYTE]);
@@ -20,7 +18,7 @@ export type Options = {
   root: string,
 };
 
-class FileStore<T> {
+export default class FileStore<T> {
   _root: string;
 
   constructor(options: Options) {
@@ -90,5 +88,3 @@ class FileStore<T> {
     }
   }
 }
-
-module.exports = FileStore;
diff --git a/packages/metro-cache/src/stores/HttpError.js b/packages/metro-cache/src/stores/HttpError.js
index d19114711f..4baf14a5d0 100644
--- a/packages/metro-cache/src/stores/HttpError.js
+++ b/packages/metro-cache/src/stores/HttpError.js
@@ -8,9 +8,7 @@
  * @flow strict
  */
 
-'use strict';
-
-class HttpError extends Error {
+export default class HttpError extends Error {
   code: number;
 
   constructor(message: string, code: number) {
@@ -19,5 +17,3 @@ class HttpError extends Error {
     this.code = code;
   }
 }
-
-module.exports = HttpError;
diff --git a/packages/metro-cache/src/stores/HttpGetStore.js b/packages/metro-cache/src/stores/HttpGetStore.js
index 9dc163651a..7608b7801a 100644
--- a/packages/metro-cache/src/stores/HttpGetStore.js
+++ b/packages/metro-cache/src/stores/HttpGetStore.js
@@ -8,16 +8,14 @@
  * @flow strict-local
  */
 
-'use strict';
-
 import type HttpError from './HttpError';
 import type NetworkError from './NetworkError';
 import type {HttpOptions} from 'metro-cache';
 
-const HttpStore = require('./HttpStore');
-const {Logger} = require('metro-core');
+import HttpStore from './HttpStore';
+import {Logger} from 'metro-core';
 
-class HttpGetStore<T> extends HttpStore<T> {
+export default class HttpGetStore<T> extends HttpStore<T> {
   _warned: boolean;
 
   constructor(options: HttpOptions) {
@@ -66,5 +64,3 @@ class HttpGetStore<T> extends HttpStore<T> {
     }
   }
 }
-
-module.exports = HttpGetStore;
diff --git a/packages/metro-cache/src/stores/HttpStore.js b/packages/metro-cache/src/stores/HttpStore.js
index 73020852c4..3269d25780 100644
--- a/packages/metro-cache/src/stores/HttpStore.js
+++ b/packages/metro-cache/src/stores/HttpStore.js
@@ -8,17 +8,15 @@
  * @flow
  */
 
-'use strict';
-
 import type {HttpsProxyAgentOptions} from 'https-proxy-agent';
 
-const HttpError = require('./HttpError');
-const NetworkError = require('./NetworkError');
-const {backOff} = require('exponential-backoff');
-const http = require('http');
-const https = require('https');
-const {HttpsProxyAgent} = require('https-proxy-agent');
-const zlib = require('zlib');
+import HttpError from './HttpError';
+import NetworkError from './NetworkError';
+import {backOff} from 'exponential-backoff';
+import http from 'http';
+import https from 'https';
+import {HttpsProxyAgent} from 'https-proxy-agent';
+import zlib from 'zlib';
 
 export type Options =
   | EndpointOptions // Uses the same options for both reads and writes
@@ -76,7 +74,7 @@ const ZLIB_OPTIONS = {
 const NULL_BYTE = 0x00;
 const NULL_BYTE_BUFFER = Buffer.from([NULL_BYTE]);
 
-class HttpStore<T> {
+export default class HttpStore<T> {
   static HttpError: typeof HttpError = HttpError;
   static NetworkError: typeof NetworkError = NetworkError;
 
@@ -407,5 +405,3 @@ class HttpStore<T> {
     });
   }
 }
-
-module.exports = HttpStore;
diff --git a/packages/metro-cache/src/stores/NetworkError.js b/packages/metro-cache/src/stores/NetworkError.js
index 850a7bda98..b3ec18cc16 100644
--- a/packages/metro-cache/src/stores/NetworkError.js
+++ b/packages/metro-cache/src/stores/NetworkError.js
@@ -8,9 +8,7 @@
  * @flow strict
  */
 
-'use strict';
-
-class NetworkError extends Error {
+export default class NetworkError extends Error {
   code: string;
 
   constructor(message: string, code: string) {
@@ -19,5 +17,3 @@ class NetworkError extends Error {
     this.code = code;
   }
 }
-
-module.exports = NetworkError;
diff --git a/packages/metro-cache/src/stores/__tests__/AutoCleanFileStore-test.js b/packages/metro-cache/src/stores/__tests__/AutoCleanFileStore-test.js
index c2b962f076..af314226b8 100644
--- a/packages/metro-cache/src/stores/__tests__/AutoCleanFileStore-test.js
+++ b/packages/metro-cache/src/stores/__tests__/AutoCleanFileStore-test.js
@@ -21,7 +21,7 @@ describe('AutoCleanFileStore', () => {
       .resetAllMocks()
       .mock('fs', () => new (require('metro-memory-fs'))());
 
-    AutoCleanFileStore = require('../AutoCleanFileStore');
+    AutoCleanFileStore = require('../AutoCleanFileStore').default;
     fs = require('fs');
     jest.spyOn(fs, 'unlinkSync');
   });
diff --git a/packages/metro-cache/src/stores/__tests__/FileStore-test.js b/packages/metro-cache/src/stores/__tests__/FileStore-test.js
index 0f9cdd4ca9..027e7d3eb4 100644
--- a/packages/metro-cache/src/stores/__tests__/FileStore-test.js
+++ b/packages/metro-cache/src/stores/__tests__/FileStore-test.js
@@ -22,7 +22,7 @@ describe('FileStore', () => {
       .resetAllMocks()
       .mock('fs', () => new (require('metro-memory-fs'))());
 
-    FileStore = require('../FileStore');
+    FileStore = require('../FileStore').default;
     fs = require('fs');
     jest.spyOn(fs, 'unlinkSync');
   });
diff --git a/packages/metro-cache/src/stores/__tests__/HttpGetStore-test.js b/packages/metro-cache/src/stores/__tests__/HttpGetStore-test.js
index a98d97789a..6729996999 100644
--- a/packages/metro-cache/src/stores/__tests__/HttpGetStore-test.js
+++ b/packages/metro-cache/src/stores/__tests__/HttpGetStore-test.js
@@ -1,3 +1,10 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
 'use strict';
 
 const {PassThrough} = require('stream');
@@ -35,7 +42,7 @@ describe('HttpGetStore', () => {
     httpPassThrough = new PassThrough();
     require('http').request.mockReturnValue(httpPassThrough);
 
-    HttpGetStore = require('../HttpGetStore');
+    HttpGetStore = require('../HttpGetStore').default;
 
     warningMessages = [];
 
diff --git a/packages/metro-cache/src/stores/__tests__/HttpStore-test.js b/packages/metro-cache/src/stores/__tests__/HttpStore-test.js
index 2d972e5954..e8496ab2b9 100644
--- a/packages/metro-cache/src/stores/__tests__/HttpStore-test.js
+++ b/packages/metro-cache/src/stores/__tests__/HttpStore-test.js
@@ -67,7 +67,7 @@ describe('HttpStore', () => {
     require('http').request.mockReturnValue(httpPassThrough);
     require('https').request.mockReturnValue(httpPassThrough);
 
-    HttpStore = require('../HttpStore');
+    HttpStore = require('../HttpStore').default;
   });
 
   test('works with HTTP and HTTPS', () => {
diff --git a/packages/metro-cache/src/types.js b/packages/metro-cache/src/types.js
index f4f3a27bff..f903231a83 100644
--- a/packages/metro-cache/src/types.js
+++ b/packages/metro-cache/src/types.js
@@ -9,8 +9,6 @@
  * @oncall react_native
  */
 
-'use strict';
-
 export interface CacheStore<T> {
   name?: string;
   get(key: Buffer): ?T | Promise<?T>;
diff --git a/packages/metro-config/src/__tests__/loadConfig-test.js b/packages/metro-config/src/__tests__/loadConfig-test.js
index 99525c6c85..f039f3982f 100644
--- a/packages/metro-config/src/__tests__/loadConfig-test.js
+++ b/packages/metro-config/src/__tests__/loadConfig-test.js
@@ -9,11 +9,11 @@
  * @oncall react_native
  */
 
-'use strict';
+// eslint-disable-next-line lint/sort-imports
+import getDefaultConfig from '../defaults';
 
 jest.mock('cosmiconfig');
 
-const getDefaultConfig = require('../defaults');
 const {loadConfig} = require('../loadConfig');
 const cosmiconfig = require('cosmiconfig');
 const path = require('path');
diff --git a/packages/metro-config/src/defaults/__tests__/exclusionList-test.js b/packages/metro-config/src/defaults/__tests__/exclusionList-test.js
index d3e36bea3a..824387fe89 100644
--- a/packages/metro-config/src/defaults/__tests__/exclusionList-test.js
+++ b/packages/metro-config/src/defaults/__tests__/exclusionList-test.js
@@ -9,9 +9,8 @@
  * @oncall react_native
  */
 
-'use strict';
+import exclusionList from '../exclusionList';
 
-const exclusionList = require('../exclusionList');
 const path = require('path');
 
 describe('exclusionList', () => {
diff --git a/packages/metro-config/src/defaults/defaults.js b/packages/metro-config/src/defaults/defaults.js
index ab2a058153..43976cf8dd 100644
--- a/packages/metro-config/src/defaults/defaults.js
+++ b/packages/metro-config/src/defaults/defaults.js
@@ -9,13 +9,11 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {PerfLogger, RootPerfLogger} from '../types';
 
-const defaultCreateModuleIdFactory = require('metro/private/lib/createModuleIdFactory');
+export {default as defaultCreateModuleIdFactory} from 'metro/private/lib/createModuleIdFactory';
 
-exports.assetExts = [
+export const assetExts = [
   // Image formats
   'bmp',
   'gif',
@@ -52,23 +50,21 @@ exports.assetExts = [
   'zip',
 ];
 
-exports.assetResolutions = ['1', '1.5', '2', '3', '4'];
+export const assetResolutions = ['1', '1.5', '2', '3', '4'];
 
-exports.sourceExts = ['js', 'jsx', 'json', 'ts', 'tsx'];
+export const sourceExts = ['js', 'jsx', 'json', 'ts', 'tsx'];
 
-exports.additionalExts = ['cjs', 'mjs'];
+export const additionalExts = ['cjs', 'mjs'];
 
-exports.moduleSystem = (require.resolve(
+export const moduleSystem = (require.resolve(
   'metro-runtime/src/polyfills/require.js',
 ): string);
 
-exports.platforms = ['ios', 'android', 'windows', 'web'];
-
-exports.DEFAULT_METRO_MINIFIER_PATH = 'metro-minify-terser';
+export const platforms = ['ios', 'android', 'windows', 'web'];
 
-exports.defaultCreateModuleIdFactory = defaultCreateModuleIdFactory;
+export const DEFAULT_METRO_MINIFIER_PATH = 'metro-minify-terser';
 
-exports.noopPerfLoggerFactory = (): RootPerfLogger => {
+export const noopPerfLoggerFactory = (): RootPerfLogger => {
   class Logger {
     start() {}
     end() {}
diff --git a/packages/metro-config/src/defaults/exclusionList.js b/packages/metro-config/src/defaults/exclusionList.js
index 6728f673bb..303bcef5e8 100644
--- a/packages/metro-config/src/defaults/exclusionList.js
+++ b/packages/metro-config/src/defaults/exclusionList.js
@@ -8,9 +8,7 @@
  * @oncall react_native
  */
 
-'use strict';
-
-var path = require('path');
+import path from 'path';
 
 var list = [/\/__tests__\/.*/];
 
@@ -36,12 +34,10 @@ function escapeRegExp(pattern) {
   }
 }
 
-function exclusionList(additionalExclusions) {
+export default function exclusionList(additionalExclusions) {
   return new RegExp(
     '(' +
       (additionalExclusions || []).concat(list).map(escapeRegExp).join('|') +
       ')$',
   );
 }
-
-module.exports = exclusionList;
diff --git a/packages/metro-config/src/defaults/index.js b/packages/metro-config/src/defaults/index.js
index da707a75ee..0a590cc031 100644
--- a/packages/metro-config/src/defaults/index.js
+++ b/packages/metro-config/src/defaults/index.js
@@ -9,11 +9,9 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {ConfigT} from '../types';
 
-const {
+import {
   DEFAULT_METRO_MINIFIER_PATH,
   additionalExts,
   assetExts,
@@ -22,14 +20,14 @@ const {
   noopPerfLoggerFactory,
   platforms,
   sourceExts,
-} = require('./defaults');
-const exclusionList = require('./exclusionList');
-const {FileStore} = require('metro-cache');
-const {Terminal} = require('metro-core');
-const getMaxWorkers = require('metro/private/lib/getMaxWorkers');
-const TerminalReporter = require('metro/private/lib/TerminalReporter');
-const os = require('os');
-const path = require('path');
+} from './defaults';
+import exclusionList from './exclusionList';
+import {FileStore} from 'metro-cache';
+import {Terminal} from 'metro-core';
+import getMaxWorkers from 'metro/private/lib/getMaxWorkers';
+import TerminalReporter from 'metro/private/lib/TerminalReporter';
+import os from 'os';
+import path from 'path';
 
 const getDefaultValues = (projectRoot: ?string): ConfigT => ({
   resolver: {
@@ -182,4 +180,4 @@ async function getDefaultConfig(rootPath: ?string): Promise<ConfigT> {
 }
 
 getDefaultConfig.getDefaultValues = getDefaultValues;
-module.exports = getDefaultConfig;
+export default getDefaultConfig;
diff --git a/packages/metro-config/src/defaults/validConfig.js b/packages/metro-config/src/defaults/validConfig.js
index 037cb0c22d..60b3dcc673 100644
--- a/packages/metro-config/src/defaults/validConfig.js
+++ b/packages/metro-config/src/defaults/validConfig.js
@@ -9,10 +9,12 @@
  * @oncall react_native
  */
 
+/* eslint-disable import/no-commonjs */
+
 'use strict';
 
 module.exports = (async () => {
-  const defaultConfig = await require('./index')('/path/to/project');
+  const defaultConfig = await require('./index').default('/path/to/project');
   const validConfig = {
     ...defaultConfig,
     resolver: {
diff --git a/packages/metro-config/src/index.js b/packages/metro-config/src/index.js
index 47a8753481..ad754a8d16 100644
--- a/packages/metro-config/src/index.js
+++ b/packages/metro-config/src/index.js
@@ -9,6 +9,8 @@
  * @oncall react_native
  */
 
+/* eslint-disable import/no-commonjs */
+
 'use strict';
 
 /*::
diff --git a/packages/metro-config/src/loadConfig.js b/packages/metro-config/src/loadConfig.js
index 3f54a1dc40..f5ed2cff8b 100644
--- a/packages/metro-config/src/loadConfig.js
+++ b/packages/metro-config/src/loadConfig.js
@@ -9,18 +9,16 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {ConfigT, InputConfigT, YargArguments} from './types';
 
-const getDefaultConfig = require('./defaults');
-const validConfig = require('./defaults/validConfig');
-const cosmiconfig = require('cosmiconfig');
-const fs = require('fs');
-const {validate} = require('jest-validate');
-const MetroCache = require('metro-cache');
-const path = require('path');
-const {dirname, join} = require('path');
+import getDefaultConfig from './defaults';
+import validConfig from './defaults/validConfig';
+import cosmiconfig from 'cosmiconfig';
+import fs from 'fs';
+import {validate} from 'jest-validate';
+import * as MetroCache from 'metro-cache';
+import path from 'path';
+import {dirname, join} from 'path';
 
 type CosmiConfigResult = {
   filepath: string,
@@ -321,8 +319,4 @@ async function loadConfig(
   });
 }
 
-module.exports = {
-  loadConfig,
-  resolveConfig,
-  mergeConfig,
-};
+export {loadConfig, resolveConfig, mergeConfig};
diff --git a/packages/metro-config/src/types.js b/packages/metro-config/src/types.js
index 41923924b0..ee41068870 100644
--- a/packages/metro-config/src/types.js
+++ b/packages/metro-config/src/types.js
@@ -8,12 +8,10 @@
  * @flow strict-local
  */
 
-'use strict';
-
 import type {IntermediateStackFrame} from '../../metro/src/Server/symbolicate';
 import type {HandleFunction, Server} from 'connect';
 import type {CacheStore} from 'metro-cache';
-import typeof MetroCache from 'metro-cache';
+import typeof * as MetroCache from 'metro-cache';
 import type {CacheManagerFactory} from 'metro-file-map';
 import type {CustomResolver} from 'metro-resolver';
 import type {JsTransformerConfig} from 'metro-transform-worker';
diff --git a/packages/metro-config/types/defaults/index.d.ts b/packages/metro-config/types/defaults/index.d.ts
index 0b85f1964a..73ff82dcce 100644
--- a/packages/metro-config/types/defaults/index.d.ts
+++ b/packages/metro-config/types/defaults/index.d.ts
@@ -8,7 +8,7 @@
  * @oncall react_native
  */
 
-import type {ConfigT} from '../configTypes';
+import type {ConfigT} from '../types';
 
 export default interface getDefaultConfig {
   (rootPath: string | null): Promise<ConfigT>;
diff --git a/packages/metro-core/src/Logger.js b/packages/metro-core/src/Logger.js
index d43ac17a07..eba5b38c7e 100644
--- a/packages/metro-core/src/Logger.js
+++ b/packages/metro-core/src/Logger.js
@@ -9,13 +9,13 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {BundleOptions} from 'metro/private/shared/types';
 
+import EventEmitter from 'events';
+import os from 'os';
+
+// eslint-disable-next-line import/no-commonjs
 const VERSION = require('../package.json').version;
-const {EventEmitter} = require('events');
-const os = require('os');
 
 export type ActionLogEntryData = {
   action_name: string,
@@ -113,10 +113,4 @@ function log(logEntry: LogEntry): LogEntry {
   return logEntry;
 }
 
-module.exports = {
-  on,
-  createEntry,
-  createActionStartEntry,
-  createActionEndEntry,
-  log,
-};
+export {on, createEntry, createActionStartEntry, createActionEndEntry, log};
diff --git a/packages/metro-core/src/Terminal.js b/packages/metro-core/src/Terminal.js
index 2339a8f425..f1b1b74049 100644
--- a/packages/metro-core/src/Terminal.js
+++ b/packages/metro-core/src/Terminal.js
@@ -9,12 +9,10 @@
  * @oncall react_native
  */
 
-'use strict';
-
-const throttle = require('lodash.throttle');
-const readline = require('readline');
-const tty = require('tty');
-const util = require('util');
+import throttle from 'lodash.throttle';
+import readline from 'readline';
+import tty from 'tty';
+import util from 'util';
 
 const {promisify} = util;
 
@@ -90,7 +88,7 @@ function getTTYStream(stream: UnderlyingStream): ?tty.WriteStream {
  * "error" printers, as it is not meant for formatting/reporting. It has the
  * single responsibility of handling status messages.
  */
-class Terminal {
+export default class Terminal {
   _logLines: Array<string>;
   _nextStatusStr: string;
   _statusStr: string;
@@ -247,5 +245,3 @@ class Terminal {
     this._nextStatusStr = '';
   }
 }
-
-module.exports = Terminal;
diff --git a/packages/metro-core/src/__tests__/Terminal-test.js b/packages/metro-core/src/__tests__/Terminal-test.js
index 1fe91d7eb1..9ae4684835 100644
--- a/packages/metro-core/src/__tests__/Terminal-test.js
+++ b/packages/metro-core/src/__tests__/Terminal-test.js
@@ -49,7 +49,7 @@ describe.each([false, true])(
     });
 
     function prepare({isTTY, ttyPrint}) {
-      const Terminal = require('../Terminal');
+      const Terminal = require('../Terminal').default;
       const lines = 10;
       const columns = 10;
       const stream = Object.create(
diff --git a/packages/metro-core/src/__tests__/canonicalize-test.js b/packages/metro-core/src/__tests__/canonicalize-test.js
index e4b6f5eb71..30e266ee79 100644
--- a/packages/metro-core/src/__tests__/canonicalize-test.js
+++ b/packages/metro-core/src/__tests__/canonicalize-test.js
@@ -9,9 +9,7 @@
  * @oncall react_native
  */
 
-'use strict';
-
-const canonicalize = require('../canonicalize');
+import canonicalize from '../canonicalize';
 
 describe('canonicalize', () => {
   test('has the same output for two objects with the same key/value pairs', () => {
diff --git a/packages/metro-core/src/canonicalize.js b/packages/metro-core/src/canonicalize.js
index af71ec9ebc..a346919ac7 100644
--- a/packages/metro-core/src/canonicalize.js
+++ b/packages/metro-core/src/canonicalize.js
@@ -9,9 +9,7 @@
  * @oncall react_native
  */
 
-'use strict';
-
-function canonicalize(key: string, value: mixed): mixed {
+export default function canonicalize(key: string, value: mixed): mixed {
   if (
     // eslint-disable-next-line lint/strictly-null
     value === null ||
@@ -31,5 +29,3 @@ function canonicalize(key: string, value: mixed): mixed {
 
   return object;
 }
-
-module.exports = canonicalize;
diff --git a/packages/metro-core/src/errors.js b/packages/metro-core/src/errors.js
index 40db740daa..f552410593 100644
--- a/packages/metro-core/src/errors.js
+++ b/packages/metro-core/src/errors.js
@@ -9,12 +9,7 @@
  * @oncall react_native
  */
 
-'use strict';
+import AmbiguousModuleResolutionError from './errors/AmbiguousModuleResolutionError';
+import PackageResolutionError from './errors/PackageResolutionError';
 
-const AmbiguousModuleResolutionError = require('./errors/AmbiguousModuleResolutionError');
-const PackageResolutionError = require('./errors/PackageResolutionError');
-
-module.exports = {
-  AmbiguousModuleResolutionError,
-  PackageResolutionError,
-};
+export {AmbiguousModuleResolutionError, PackageResolutionError};
diff --git a/packages/metro-core/src/errors/AmbiguousModuleResolutionError.js b/packages/metro-core/src/errors/AmbiguousModuleResolutionError.js
index 4a9d4a37ae..6e0531521a 100644
--- a/packages/metro-core/src/errors/AmbiguousModuleResolutionError.js
+++ b/packages/metro-core/src/errors/AmbiguousModuleResolutionError.js
@@ -9,11 +9,9 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {DuplicateHasteCandidatesError} from 'metro-file-map';
 
-class AmbiguousModuleResolutionError extends Error {
+export default class AmbiguousModuleResolutionError extends Error {
   fromModulePath: string;
   hasteError: DuplicateHasteCandidatesError;
 
@@ -29,5 +27,3 @@ class AmbiguousModuleResolutionError extends Error {
     this.hasteError = hasteError;
   }
 }
-
-module.exports = AmbiguousModuleResolutionError;
diff --git a/packages/metro-core/src/errors/PackageResolutionError.js b/packages/metro-core/src/errors/PackageResolutionError.js
index 41bf798d3f..94acbf29cb 100644
--- a/packages/metro-core/src/errors/PackageResolutionError.js
+++ b/packages/metro-core/src/errors/PackageResolutionError.js
@@ -9,13 +9,11 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {InvalidPackageError} from 'metro-resolver';
 
-const {formatFileCandidates} = require('metro-resolver');
+import {formatFileCandidates} from 'metro-resolver';
 
-class PackageResolutionError extends Error {
+export default class PackageResolutionError extends Error {
   originModulePath: string;
   packageError: InvalidPackageError;
   targetModuleName: string;
@@ -40,5 +38,3 @@ class PackageResolutionError extends Error {
     Object.assign(this, opts);
   }
 }
-
-module.exports = PackageResolutionError;
diff --git a/packages/metro-core/src/index.js b/packages/metro-core/src/index.js
index 45cdd92559..cb6c4d6632 100644
--- a/packages/metro-core/src/index.js
+++ b/packages/metro-core/src/index.js
@@ -9,14 +9,12 @@
  * @oncall react_native
  */
 
-'use strict';
+import AmbiguousModuleResolutionError from './errors/AmbiguousModuleResolutionError';
+import PackageResolutionError from './errors/PackageResolutionError';
+import * as Logger from './Logger';
+import Terminal from './Terminal';
 
-const AmbiguousModuleResolutionError = require('./errors/AmbiguousModuleResolutionError');
-const PackageResolutionError = require('./errors/PackageResolutionError');
-const Logger = require('./Logger');
-const Terminal = require('./Terminal');
-
-module.exports = {
+export {
   AmbiguousModuleResolutionError,
   Logger,
   PackageResolutionError,
diff --git a/packages/metro-file-map/src/Watcher.js b/packages/metro-file-map/src/Watcher.js
index 0c14a03095..1e9b3459bd 100644
--- a/packages/metro-file-map/src/Watcher.js
+++ b/packages/metro-file-map/src/Watcher.js
@@ -32,6 +32,7 @@ import nullthrows from 'nullthrows';
 import * as path from 'path';
 import {performance} from 'perf_hooks';
 
+// eslint-disable-next-line import/no-commonjs
 const debug = require('debug')('Metro:Watcher');
 
 const MAX_WAIT_TIME = 240000;
diff --git a/packages/metro-file-map/src/__tests__/haste_impl.js b/packages/metro-file-map/src/__tests__/haste_impl.js
index 12e57dcc66..f2593b033a 100644
--- a/packages/metro-file-map/src/__tests__/haste_impl.js
+++ b/packages/metro-file-map/src/__tests__/haste_impl.js
@@ -8,6 +8,8 @@
  * @oncall react_native
  */
 
+/* eslint-disable import/no-commonjs */
+
 'use strict';
 
 const path = require('path');
diff --git a/packages/metro-file-map/src/__tests__/index-test.js b/packages/metro-file-map/src/__tests__/index-test.js
index 4d6be6239b..16c62190a0 100644
--- a/packages/metro-file-map/src/__tests__/index-test.js
+++ b/packages/metro-file-map/src/__tests__/index-test.js
@@ -54,9 +54,10 @@ jest.mock('jest-worker', () => ({
   }),
 }));
 
-jest.mock('../crawlers/node');
-jest.mock('../crawlers/watchman', () =>
-  jest.fn(options => {
+jest.mock('../crawlers/node', () => ({__esModule: true, default: jest.fn()}));
+jest.mock('../crawlers/watchman', () => ({
+  __esModule: true,
+  default: jest.fn(options => {
     const path = require('path');
 
     const {
@@ -110,7 +111,7 @@ jest.mock('../crawlers/watchman', () =>
       clocks: mockClocks,
     });
   }),
-);
+}));
 
 class MockWatcher extends AbstractWatcher {
   constructor(root: string, opts: WatcherBackendOptions) {
@@ -575,7 +576,7 @@ describe('FileMap', () => {
     ])(
       'uses watchman: %s, symlinks enabled: %s',
       async (useWatchman, enableSymlinks) => {
-        const node = require('../crawlers/node');
+        const node = require('../crawlers/node').default;
 
         // $FlowFixMe[prop-missing]
         // $FlowFixMe[missing-local-annot]
@@ -1412,7 +1413,7 @@ describe('FileMap', () => {
   });
 
   test('ignores files that do not exist', async () => {
-    const watchman = require('../crawlers/watchman');
+    const watchman = require('../crawlers/watchman').default;
     // $FlowFixMe[prop-missing]
     const mockImpl: typeof watchman = watchman.getMockImplementation();
     // Wrap the watchman mock and add an invalid file to the file list.
@@ -1521,8 +1522,8 @@ describe('FileMap', () => {
   });
 
   test('tries to crawl using node as a fallback', async () => {
-    const watchman = require('../crawlers/watchman');
-    const node = require('../crawlers/node');
+    const watchman = require('../crawlers/watchman').default;
+    const node = require('../crawlers/node').default;
 
     // $FlowFixMe[prop-missing]
     watchman.mockImplementation(() => {
@@ -1563,8 +1564,8 @@ describe('FileMap', () => {
   });
 
   test('tries to crawl using node as a fallback when promise fails once', async () => {
-    const watchman = require('../crawlers/watchman');
-    const node = require('../crawlers/node');
+    const watchman = require('../crawlers/watchman').default;
+    const node = require('../crawlers/node').default;
 
     // $FlowFixMe[prop-missing]
     watchman.mockImplementation(() =>
@@ -1603,8 +1604,8 @@ describe('FileMap', () => {
 
   test('stops crawling when both crawlers fail', async () => {
     expect.assertions(1);
-    const watchman = require('../crawlers/watchman');
-    const node = require('../crawlers/node');
+    const watchman = require('../crawlers/watchman').default;
+    const node = require('../crawlers/node').default;
 
     // $FlowFixMe[prop-missing]
     watchman.mockImplementation(() =>
diff --git a/packages/metro-file-map/src/cache/DiskCacheManager.js b/packages/metro-file-map/src/cache/DiskCacheManager.js
index 6451175a03..eff4645587 100644
--- a/packages/metro-file-map/src/cache/DiskCacheManager.js
+++ b/packages/metro-file-map/src/cache/DiskCacheManager.js
@@ -24,6 +24,7 @@ import path from 'path';
 import {Timeout, clearTimeout, setTimeout} from 'timers';
 import {deserialize, serialize} from 'v8';
 
+// eslint-disable-next-line import/no-commonjs
 const debug = require('debug')('Metro:FileMapCache');
 
 type AutoSaveOptions = $ReadOnly<{
diff --git a/packages/metro-file-map/src/constants.js b/packages/metro-file-map/src/constants.js
index 9fa2000ef0..f2c11f4488 100644
--- a/packages/metro-file-map/src/constants.js
+++ b/packages/metro-file-map/src/constants.js
@@ -8,6 +8,8 @@
  * @noformat - Flow comment syntax
  */
 
+/* eslint-disable import/no-commonjs */
+
 /*
  * This file exports a set of constants that are used for Jest's haste map
  * serialization. On very large repositories, the haste map cache becomes very
diff --git a/packages/metro-file-map/src/crawlers/__tests__/node-test.js b/packages/metro-file-map/src/crawlers/__tests__/node-test.js
index 07f8ca6ac4..1bc720543b 100644
--- a/packages/metro-file-map/src/crawlers/__tests__/node-test.js
+++ b/packages/metro-file-map/src/crawlers/__tests__/node-test.js
@@ -146,7 +146,7 @@ describe('node crawler', () => {
 
   test('crawls for files based on patterns', async () => {
     childProcess = require('child_process');
-    nodeCrawl = require('../node');
+    nodeCrawl = require('../node').default;
 
     mockResponse = [
       '/project/fruits/pear.js',
@@ -195,7 +195,7 @@ describe('node crawler', () => {
   });
 
   test('updates only changed files', async () => {
-    nodeCrawl = require('../node');
+    nodeCrawl = require('../node').default;
 
     // In this test sample, strawberry is changed and tomato is unchanged
     const tomato = [33, 42, 1, '', null, 0, ''];
@@ -223,7 +223,7 @@ describe('node crawler', () => {
   });
 
   test('returns removed files', async () => {
-    nodeCrawl = require('../node');
+    nodeCrawl = require('../node').default;
 
     // In this test sample, previouslyExisted was present before and will not be
     // when crawling this directory.
@@ -255,7 +255,7 @@ describe('node crawler', () => {
     mockSpawnExit = 1;
     childProcess = require('child_process');
 
-    nodeCrawl = require('../node');
+    nodeCrawl = require('../node').default;
 
     const {changedFiles, removedFiles} = await nodeCrawl({
       previousState: {fileSystem: emptyFS},
@@ -284,7 +284,7 @@ describe('node crawler', () => {
     childProcess.spawn.mockImplementationOnce(() => {
       throw new Error();
     });
-    nodeCrawl = require('../node');
+    nodeCrawl = require('../node').default;
 
     const {changedFiles, removedFiles} = await nodeCrawl({
       console: global.console,
@@ -306,7 +306,7 @@ describe('node crawler', () => {
 
   test('uses node fs APIs if "forceNodeFilesystemAPI" is set to true, regardless of platform', async () => {
     childProcess = require('child_process');
-    nodeCrawl = require('../node');
+    nodeCrawl = require('../node').default;
 
     const {changedFiles, removedFiles} = await nodeCrawl({
       console: global.console,
@@ -329,7 +329,7 @@ describe('node crawler', () => {
   });
 
   test('completes with empty roots', async () => {
-    nodeCrawl = require('../node');
+    nodeCrawl = require('../node').default;
 
     const {changedFiles, removedFiles} = await nodeCrawl({
       console: global.console,
@@ -346,7 +346,7 @@ describe('node crawler', () => {
   });
 
   test('completes with fs.readdir throwing an error', async () => {
-    nodeCrawl = require('../node');
+    nodeCrawl = require('../node').default;
 
     const mockConsole = {
       ...global.console,
@@ -371,7 +371,7 @@ describe('node crawler', () => {
   });
 
   test('uses the withFileTypes option with readdir', async () => {
-    nodeCrawl = require('../node');
+    nodeCrawl = require('../node').default;
     const fs = require('graceful-fs');
 
     const {changedFiles, removedFiles} = await nodeCrawl({
@@ -398,7 +398,7 @@ describe('node crawler', () => {
   });
 
   test('aborts the crawl on pre-aborted signal', async () => {
-    nodeCrawl = require('../node');
+    nodeCrawl = require('../node').default;
     const err = new Error('aborted for test');
     await expect(
       nodeCrawl({
@@ -430,7 +430,7 @@ describe('node crawler', () => {
       },
     };
 
-    nodeCrawl = require('../node');
+    nodeCrawl = require('../node').default;
     await expect(
       nodeCrawl({
         console: global.console,
diff --git a/packages/metro-file-map/src/crawlers/__tests__/watchman-test.js b/packages/metro-file-map/src/crawlers/__tests__/watchman-test.js
index 2c8b5faed8..2d971458cd 100644
--- a/packages/metro-file-map/src/crawlers/__tests__/watchman-test.js
+++ b/packages/metro-file-map/src/crawlers/__tests__/watchman-test.js
@@ -76,7 +76,7 @@ const createMap = obj => new Map(Object.keys(obj).map(key => [key, obj[key]]));
 
 describe('watchman watch', () => {
   beforeEach(() => {
-    watchmanCrawl = require('../watchman');
+    watchmanCrawl = require('../watchman').default;
 
     watchman = require('fb-watchman');
 
diff --git a/packages/metro-file-map/src/crawlers/node/index.js b/packages/metro-file-map/src/crawlers/node/index.js
index 31ecf1c5ed..a21fb02b1e 100644
--- a/packages/metro-file-map/src/crawlers/node/index.js
+++ b/packages/metro-file-map/src/crawlers/node/index.js
@@ -24,6 +24,7 @@ import * as fs from 'graceful-fs';
 import {platform} from 'os';
 import * as path from 'path';
 
+// eslint-disable-next-line import/no-commonjs
 const debug = require('debug')('Metro:NodeCrawler');
 
 type Callback = (result: FileData) => void;
@@ -171,7 +172,7 @@ function findNative(
   });
 }
 
-module.exports = async function nodeCrawl(options: CrawlerOptions): Promise<{
+export default async function nodeCrawl(options: CrawlerOptions): Promise<{
   removedFiles: Set<CanonicalPath>,
   changedFiles: FileData,
 }> {
@@ -235,4 +236,4 @@ module.exports = async function nodeCrawl(options: CrawlerOptions): Promise<{
       );
     }
   });
-};
+}
diff --git a/packages/metro-file-map/src/crawlers/watchman/index.js b/packages/metro-file-map/src/crawlers/watchman/index.js
index 858f6f97f0..319c2a4a3e 100644
--- a/packages/metro-file-map/src/crawlers/watchman/index.js
+++ b/packages/metro-file-map/src/crawlers/watchman/index.js
@@ -24,12 +24,11 @@ import normalizePathSeparatorsToPosix from '../../lib/normalizePathSeparatorsToP
 import normalizePathSeparatorsToSystem from '../../lib/normalizePathSeparatorsToSystem';
 import {RootPathUtils} from '../../lib/RootPathUtils';
 import {planQuery} from './planQuery';
+import watchman from 'fb-watchman';
 import invariant from 'invariant';
 import * as path from 'path';
 import {performance} from 'perf_hooks';
 
-const watchman = require('fb-watchman');
-
 type WatchmanRoots = Map<
   string, // Posix-separated absolute path
   $ReadOnly<{directoryFilters: Array<string>, watcher: string}>,
@@ -47,7 +46,7 @@ function makeWatchmanError(error: Error): Error {
   return error;
 }
 
-module.exports = async function watchmanCrawl({
+export default async function watchmanCrawl({
   abortSignal,
   computeSha1,
   extensions,
@@ -367,4 +366,4 @@ module.exports = async function watchmanCrawl({
     removedFiles,
     clocks: newClocks,
   };
-};
+}
diff --git a/packages/metro-file-map/src/flow-types.js b/packages/metro-file-map/src/flow-types.js
index 7123edd571..228b43de79 100644
--- a/packages/metro-file-map/src/flow-types.js
+++ b/packages/metro-file-map/src/flow-types.js
@@ -9,8 +9,6 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {PerfLogger, PerfLoggerFactory, RootPerfLogger} from 'metro-config';
 
 export type {PerfLoggerFactory, PerfLogger};
diff --git a/packages/metro-file-map/src/index.js b/packages/metro-file-map/src/index.js
index 7aa335ad5c..0dbaebaf34 100644
--- a/packages/metro-file-map/src/index.js
+++ b/packages/metro-file-map/src/index.js
@@ -57,6 +57,7 @@ import nullthrows from 'nullthrows';
 import * as path from 'path';
 import {performance} from 'perf_hooks';
 
+// eslint-disable-next-line import/no-commonjs
 const debug = require('debug')('Metro:FileMap');
 
 export type {
diff --git a/packages/metro-file-map/src/lib/FileProcessor.js b/packages/metro-file-map/src/lib/FileProcessor.js
index d1e0994e8a..d22d4e9cd5 100644
--- a/packages/metro-file-map/src/lib/FileProcessor.js
+++ b/packages/metro-file-map/src/lib/FileProcessor.js
@@ -22,6 +22,7 @@ import {Worker} from '../worker';
 import {Worker as JestWorker} from 'jest-worker';
 import {sep} from 'path';
 
+// eslint-disable-next-line import/no-commonjs
 const debug = require('debug')('Metro:FileMap');
 
 type ProcessFileRequest = $ReadOnly<{
diff --git a/packages/metro-file-map/src/lib/dependencyExtractor.js b/packages/metro-file-map/src/lib/dependencyExtractor.js
index 53395e5d10..4791cf21f8 100644
--- a/packages/metro-file-map/src/lib/dependencyExtractor.js
+++ b/packages/metro-file-map/src/lib/dependencyExtractor.js
@@ -8,6 +8,9 @@
  * @flow strict
  */
 
+// Required by worker, must be commonjs
+/* eslint-disable import/no-commonjs */
+
 'use strict';
 
 const NOT_A_DOT = '(?<!\\.\\s*)';
diff --git a/packages/metro-file-map/src/watchers/FallbackWatcher.js b/packages/metro-file-map/src/watchers/FallbackWatcher.js
index 194a708f56..895bd7f83a 100644
--- a/packages/metro-file-map/src/watchers/FallbackWatcher.js
+++ b/packages/metro-file-map/src/watchers/FallbackWatcher.js
@@ -13,21 +13,21 @@
  * Originally vendored from https://github.com/amasad/sane/blob/64ff3a870c42e84f744086884bf55a4f9c22d376/src/node_watcher.js
  */
 
-'use strict';
-
 import type {
   ChangeEventMetadata,
   WatcherBackendChangeEvent,
 } from '../flow-types';
 import type {FSWatcher, Stats} from 'fs';
 
-const {AbstractWatcher} = require('./AbstractWatcher');
-const common = require('./common');
-const fs = require('fs');
-const platform = require('os').platform();
-const path = require('path');
+import {AbstractWatcher} from './AbstractWatcher';
+import * as common from './common';
+import fs from 'fs';
+import os from 'os';
+import path from 'path';
 // $FlowFixMe[untyped-import] - Write libdefs for `walker`
-const walker = require('walker');
+import walker from 'walker';
+
+const platform = os.platform();
 
 const fsPromises = fs.promises;
 
@@ -41,7 +41,7 @@ const DELETE_EVENT = common.DELETE_EVENT;
  */
 const DEBOUNCE_MS = 100;
 
-module.exports = class FallbackWatcher extends AbstractWatcher {
+export default class FallbackWatcher extends AbstractWatcher {
   +_changeTimers: Map<string, TimeoutID> = new Map();
   +_dirRegistry: {
     [directory: string]: {[file: string]: true, __proto__: null},
@@ -384,7 +384,7 @@ module.exports = class FallbackWatcher extends AbstractWatcher {
   getPauseReason(): ?string {
     return null;
   }
-};
+}
 /**
  * Determine if a given FS error can be ignored
  */
diff --git a/packages/metro-file-map/src/watchers/NativeWatcher.js b/packages/metro-file-map/src/watchers/NativeWatcher.js
index f7ffdded96..4717093648 100644
--- a/packages/metro-file-map/src/watchers/NativeWatcher.js
+++ b/packages/metro-file-map/src/watchers/NativeWatcher.js
@@ -16,6 +16,7 @@ import {promises as fsPromises, watch} from 'fs';
 import {platform} from 'os';
 import * as path from 'path';
 
+// eslint-disable-next-line import/no-commonjs
 const debug = require('debug')('Metro:NativeWatcher');
 
 const TOUCH_EVENT = 'touch';
diff --git a/packages/metro-file-map/src/watchers/RecrawlWarning.js b/packages/metro-file-map/src/watchers/RecrawlWarning.js
index 4feba11875..168d696129 100644
--- a/packages/metro-file-map/src/watchers/RecrawlWarning.js
+++ b/packages/metro-file-map/src/watchers/RecrawlWarning.js
@@ -14,8 +14,6 @@
  * https://github.com/amasad/sane/blob/64ff3a870c42e84f744086884bf55a4f9c22d376/src/utils/recrawl-warning-dedupe.js
  */
 
-'use strict';
-
 export default class RecrawlWarning {
   static RECRAWL_WARNINGS: Array<RecrawlWarning> = [];
   static REGEXP: RegExp =
diff --git a/packages/metro-file-map/src/watchers/WatchmanWatcher.js b/packages/metro-file-map/src/watchers/WatchmanWatcher.js
index 2af21236c4..4b042b987b 100644
--- a/packages/metro-file-map/src/watchers/WatchmanWatcher.js
+++ b/packages/metro-file-map/src/watchers/WatchmanWatcher.js
@@ -29,6 +29,7 @@ import {createHash} from 'crypto';
 import watchman from 'fb-watchman';
 import invariant from 'invariant';
 
+// eslint-disable-next-line import/no-commonjs
 const debug = require('debug')('Metro:WatchmanWatcher');
 
 const DELETE_EVENT = common.DELETE_EVENT;
diff --git a/packages/metro-file-map/src/watchers/common.js b/packages/metro-file-map/src/watchers/common.js
index bbf12a9f0a..4ce1070221 100644
--- a/packages/metro-file-map/src/watchers/common.js
+++ b/packages/metro-file-map/src/watchers/common.js
@@ -14,14 +14,12 @@
  * https://github.com/amasad/sane/blob/64ff3a870c42e84f744086884bf55a4f9c22d376/src/common.js
  */
 
-'use strict';
-
 import type {ChangeEventMetadata} from '../flow-types';
 import type {Stats} from 'fs';
 
 // $FlowFixMe[untyped-import] - Write libdefs for `micromatch`
-const micromatch = require('micromatch');
-const path = require('path');
+import micromatch from 'micromatch';
+import path from 'path';
 
 /**
  * Constants
diff --git a/packages/metro-file-map/src/worker.js b/packages/metro-file-map/src/worker.js
index ce43fbab28..5c135dd397 100644
--- a/packages/metro-file-map/src/worker.js
+++ b/packages/metro-file-map/src/worker.js
@@ -8,6 +8,8 @@
  * @format
  */
 
+/* eslint-disable import/no-commonjs */
+
 /*::
 import type {
   DependencyExtractor,
diff --git a/packages/metro-file-map/src/workerExclusionList.js b/packages/metro-file-map/src/workerExclusionList.js
index 050a44a39b..b136787ff8 100644
--- a/packages/metro-file-map/src/workerExclusionList.js
+++ b/packages/metro-file-map/src/workerExclusionList.js
@@ -8,6 +8,9 @@
  * @flow strict
  */
 
+// Imported directly in CJS workers - must be CommonJS
+/* eslint-disable import/no-commonjs */
+
 // This list is compiled after the MDN list of the most common MIME types (see
 // https://developer.mozilla.org/en-US/docs/Web/HTTP/Basics_of_HTTP/MIME_types/
 // Complete_list_of_MIME_types).
diff --git a/packages/metro-minify-terser/src/index.js b/packages/metro-minify-terser/src/index.js
index 0080f3c840..499994e457 100644
--- a/packages/metro-minify-terser/src/index.js
+++ b/packages/metro-minify-terser/src/index.js
@@ -9,8 +9,8 @@
  * @oncall react_native
  */
 
-'use strict';
-
-const minifier = require('./minifier');
+import minifier from './minifier';
 
+// CommonJS export for backwards compatibility
+// eslint-disable-next-line import/no-commonjs
 module.exports = minifier;
diff --git a/packages/metro-minify-terser/src/minifier.js b/packages/metro-minify-terser/src/minifier.js
index e81e4c017d..4a876358ef 100644
--- a/packages/metro-minify-terser/src/minifier.js
+++ b/packages/metro-minify-terser/src/minifier.js
@@ -9,14 +9,14 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {BasicSourceMap} from 'metro-source-map';
 import type {MinifierOptions, MinifierResult} from 'metro-transform-worker';
 
-const terser = require('terser');
+import terser from 'terser';
 
-async function minifier(options: MinifierOptions): Promise<MinifierResult> {
+export default async function minifier(
+  options: MinifierOptions,
+): Promise<MinifierResult> {
   const result = await minify(options);
 
   if (!options.map || result.map == null) {
@@ -68,5 +68,3 @@ async function minify({
     map: result.map,
   };
 }
-
-module.exports = minifier;
diff --git a/packages/metro-resolver/src/__tests__/assets-test.js b/packages/metro-resolver/src/__tests__/assets-test.js
index 6b9ff340ee..e8c37d9402 100644
--- a/packages/metro-resolver/src/__tests__/assets-test.js
+++ b/packages/metro-resolver/src/__tests__/assets-test.js
@@ -9,9 +9,7 @@
  * @oncall react_native
  */
 
-'use strict';
-
-import Resolver from '../index';
+import * as Resolver from '../index';
 import {createResolutionContext} from './utils';
 import path from 'path';
 
diff --git a/packages/metro-resolver/src/__tests__/browser-spec-test.js b/packages/metro-resolver/src/__tests__/browser-spec-test.js
index 20a4bc3377..c3122002ee 100644
--- a/packages/metro-resolver/src/__tests__/browser-spec-test.js
+++ b/packages/metro-resolver/src/__tests__/browser-spec-test.js
@@ -9,7 +9,7 @@
  * @oncall react_native
  */
 
-import Resolver from '../index';
+import * as Resolver from '../index';
 import {createPackageAccessors, createResolutionContext} from './utils';
 
 describe('browser field spec', () => {
diff --git a/packages/metro-resolver/src/__tests__/package-exports-test.js b/packages/metro-resolver/src/__tests__/package-exports-test.js
index d9fb67b30e..a3df8b864f 100644
--- a/packages/metro-resolver/src/__tests__/package-exports-test.js
+++ b/packages/metro-resolver/src/__tests__/package-exports-test.js
@@ -9,7 +9,7 @@
  * @oncall react_native
  */
 
-import Resolver from '../index';
+import * as Resolver from '../index';
 import {createPackageAccessors, createResolutionContext} from './utils';
 import path from 'path';
 
diff --git a/packages/metro-resolver/src/__tests__/package-imports-test.js b/packages/metro-resolver/src/__tests__/package-imports-test.js
index 44c34fd50a..e0befee1de 100644
--- a/packages/metro-resolver/src/__tests__/package-imports-test.js
+++ b/packages/metro-resolver/src/__tests__/package-imports-test.js
@@ -9,7 +9,7 @@
  * @oncall react_native
  */
 
-import Resolver from '../index';
+import * as Resolver from '../index';
 import {
   createPackageAccessors,
   createResolutionContext,
diff --git a/packages/metro-resolver/src/__tests__/platform-extensions-test.js b/packages/metro-resolver/src/__tests__/platform-extensions-test.js
index d3d2ee219d..72d17862df 100644
--- a/packages/metro-resolver/src/__tests__/platform-extensions-test.js
+++ b/packages/metro-resolver/src/__tests__/platform-extensions-test.js
@@ -12,7 +12,7 @@
 import type {ResolutionContext} from '../index';
 
 import FailedToResolvePathError from '../errors/FailedToResolvePathError';
-import Resolver from '../index';
+import * as Resolver from '../index';
 import {createResolutionContext} from './utils';
 
 const fileMap = {
diff --git a/packages/metro-resolver/src/__tests__/symlinks-test.js b/packages/metro-resolver/src/__tests__/symlinks-test.js
index 362ff39504..2f5f9b6361 100644
--- a/packages/metro-resolver/src/__tests__/symlinks-test.js
+++ b/packages/metro-resolver/src/__tests__/symlinks-test.js
@@ -9,15 +9,12 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {ResolutionContext} from '../index';
 
+import FailedToResolvePathError from '../errors/FailedToResolvePathError';
+import * as Resolver from '../index';
 import {createResolutionContext} from './utils';
 
-const FailedToResolvePathError = require('../errors/FailedToResolvePathError');
-const Resolver = require('../index');
-
 const fileMap = {
   '/root/project/foo.js': '',
   '/root/project/baz/index.js': '',
diff --git a/packages/metro-resolver/src/createDefaultContext.js b/packages/metro-resolver/src/createDefaultContext.js
index 69a732800b..583eb60603 100644
--- a/packages/metro-resolver/src/createDefaultContext.js
+++ b/packages/metro-resolver/src/createDefaultContext.js
@@ -24,7 +24,7 @@ type PartialContext = $ReadOnly<{
  * As context values can be overridden by callers, this occurs externally to
  * `resolve.js`.
  */
-function createDefaultContext(
+export default function createDefaultContext(
   context: PartialContext,
   dependency: TransformResultDependency,
 ): ResolutionContext {
@@ -35,5 +35,3 @@ function createDefaultContext(
     ...context,
   };
 }
-
-module.exports = createDefaultContext;
diff --git a/packages/metro-resolver/src/errors/FailedToResolveNameError.js b/packages/metro-resolver/src/errors/FailedToResolveNameError.js
index ec08c3055b..fa98c4e9cd 100644
--- a/packages/metro-resolver/src/errors/FailedToResolveNameError.js
+++ b/packages/metro-resolver/src/errors/FailedToResolveNameError.js
@@ -9,9 +9,7 @@
  * @oncall react_native
  */
 
-'use strict';
-
-class FailedToResolveNameError extends Error {
+export default class FailedToResolveNameError extends Error {
   dirPaths: $ReadOnlyArray<string>;
   extraPaths: $ReadOnlyArray<string>;
 
@@ -31,5 +29,3 @@ class FailedToResolveNameError extends Error {
     this.extraPaths = extraPaths;
   }
 }
-
-module.exports = FailedToResolveNameError;
diff --git a/packages/metro-resolver/src/errors/FailedToResolvePathError.js b/packages/metro-resolver/src/errors/FailedToResolvePathError.js
index b726c4e943..df57c950f3 100644
--- a/packages/metro-resolver/src/errors/FailedToResolvePathError.js
+++ b/packages/metro-resolver/src/errors/FailedToResolvePathError.js
@@ -9,13 +9,11 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {FileAndDirCandidates} from '../types';
 
-const formatFileCandidates = require('./formatFileCandidates');
+import formatFileCandidates from './formatFileCandidates';
 
-class FailedToResolvePathError extends Error {
+export default class FailedToResolvePathError extends Error {
   candidates: FileAndDirCandidates;
 
   constructor(candidates: FileAndDirCandidates) {
@@ -29,5 +27,3 @@ class FailedToResolvePathError extends Error {
     this.candidates = candidates;
   }
 }
-
-module.exports = FailedToResolvePathError;
diff --git a/packages/metro-resolver/src/errors/FailedToResolveUnsupportedError.js b/packages/metro-resolver/src/errors/FailedToResolveUnsupportedError.js
index bfb268f644..c12f6b096e 100644
--- a/packages/metro-resolver/src/errors/FailedToResolveUnsupportedError.js
+++ b/packages/metro-resolver/src/errors/FailedToResolveUnsupportedError.js
@@ -9,12 +9,8 @@
  * @oncall react_native
  */
 
-'use strict';
-
-class FailedToResolveUnsupportedError extends Error {
+export default class FailedToResolveUnsupportedError extends Error {
   constructor(message: string) {
     super(message);
   }
 }
-
-module.exports = FailedToResolveUnsupportedError;
diff --git a/packages/metro-resolver/src/errors/InvalidPackageError.js b/packages/metro-resolver/src/errors/InvalidPackageError.js
index f1e993d729..96281a7182 100644
--- a/packages/metro-resolver/src/errors/InvalidPackageError.js
+++ b/packages/metro-resolver/src/errors/InvalidPackageError.js
@@ -9,13 +9,11 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {FileCandidates} from '../types';
 
-const formatFileCandidates = require('./formatFileCandidates');
+import formatFileCandidates from './formatFileCandidates';
 
-class InvalidPackageError extends Error {
+export default class InvalidPackageError extends Error {
   /**
    * The file candidates we tried to find to resolve the `main` field of the
    * package. Ex. `/js/foo/beep(.js|.json)?` if `main` is specifying `./beep`
@@ -55,5 +53,3 @@ class InvalidPackageError extends Error {
     Object.assign(this, opts);
   }
 }
-
-module.exports = InvalidPackageError;
diff --git a/packages/metro-resolver/src/errors/formatFileCandidates.js b/packages/metro-resolver/src/errors/formatFileCandidates.js
index f4ecfcf80a..d64c149bba 100644
--- a/packages/metro-resolver/src/errors/formatFileCandidates.js
+++ b/packages/metro-resolver/src/errors/formatFileCandidates.js
@@ -9,11 +9,11 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {FileCandidates} from '../types';
 
-function formatFileCandidates(candidates: FileCandidates): string {
+export default function formatFileCandidates(
+  candidates: FileCandidates,
+): string {
   if (candidates.type === 'asset') {
     return candidates.name;
   }
@@ -23,5 +23,3 @@ function formatFileCandidates(candidates: FileCandidates): string {
   }
   return formatted;
 }
-
-module.exports = formatFileCandidates;
diff --git a/packages/metro-resolver/src/index.js b/packages/metro-resolver/src/index.js
index 0ab3406c12..f17cbbf4fa 100644
--- a/packages/metro-resolver/src/index.js
+++ b/packages/metro-resolver/src/index.js
@@ -9,8 +9,6 @@
  * @oncall react_native
  */
 
-'use strict';
-
 export type {
   AssetFileResolution,
   CustomResolutionContext,
@@ -27,13 +25,18 @@ export type {
   Result,
 } from './types';
 
-const Resolver = {
-  FailedToResolveNameError: require('./errors/FailedToResolveNameError'),
-  FailedToResolvePathError: require('./errors/FailedToResolvePathError'),
-  FailedToResolveUnsupportedError: require('./errors/FailedToResolveUnsupportedError'),
-  formatFileCandidates: require('./errors/formatFileCandidates'),
-  InvalidPackageError: require('./errors/InvalidPackageError'),
-  resolve: require('./resolve'),
-};
+import FailedToResolveNameError from './errors/FailedToResolveNameError';
+import FailedToResolvePathError from './errors/FailedToResolvePathError';
+import FailedToResolveUnsupportedError from './errors/FailedToResolveUnsupportedError';
+import formatFileCandidates from './errors/formatFileCandidates';
+import InvalidPackageError from './errors/InvalidPackageError';
+import resolve from './resolve';
 
-module.exports = Resolver;
+export {
+  FailedToResolveNameError,
+  FailedToResolvePathError,
+  FailedToResolveUnsupportedError,
+  formatFileCandidates,
+  InvalidPackageError,
+  resolve,
+};
diff --git a/packages/metro-resolver/src/resolve.js b/packages/metro-resolver/src/resolve.js
index 7a865db3e4..be669c3a81 100644
--- a/packages/metro-resolver/src/resolve.js
+++ b/packages/metro-resolver/src/resolve.js
@@ -9,8 +9,6 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {
   FileAndDirCandidates,
   FileCandidates,
@@ -42,7 +40,7 @@ type ParsedBareSpecifier = $ReadOnly<{
   posixSubpath: string,
 }>;
 
-function resolve(
+export default function resolve(
   context: ResolutionContext,
   moduleName: string,
   platform: string | null,
@@ -654,5 +652,3 @@ function failedFor<TResolution, TCandidates>(
 ): Result<TResolution, TCandidates> {
   return {type: 'failed', candidates};
 }
-
-module.exports = resolve;
diff --git a/packages/metro-resolver/src/types.js b/packages/metro-resolver/src/types.js
index 1ec995a627..6467580682 100644
--- a/packages/metro-resolver/src/types.js
+++ b/packages/metro-resolver/src/types.js
@@ -9,8 +9,6 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {TransformResultDependency} from 'metro/private/DeltaBundler/types';
 
 export type Result<+TResolution, +TCandidates> =
diff --git a/packages/metro-runtime/src/modules/types.js b/packages/metro-runtime/src/modules/types.js
index 91e961e16d..13a2891370 100644
--- a/packages/metro-runtime/src/modules/types.js
+++ b/packages/metro-runtime/src/modules/types.js
@@ -9,8 +9,6 @@
  * @oncall react_native
  */
 
-'use strict';
-
 export type ModuleMap = $ReadOnlyArray<[number, string]>;
 
 export type Bundle = {
diff --git a/packages/metro-source-map/src/B64Builder.js b/packages/metro-source-map/src/B64Builder.js
index 0ab5ea8172..72e6f93406 100644
--- a/packages/metro-source-map/src/B64Builder.js
+++ b/packages/metro-source-map/src/B64Builder.js
@@ -9,9 +9,7 @@
  * @oncall react_native
  */
 
-'use strict';
-
-const encode = require('./encode');
+import encode from './encode';
 
 const MAX_SEGMENT_LENGTH = 7;
 const ONE_MEG = 1024 * 1024;
@@ -30,7 +28,7 @@ const SEMICOLON = 0x3b;
  * For details about source map terminology and specification, check
  * https://docs.google.com/document/d/1U1RGAehQwRypUTovF1KRlpiOFze0b-_2gc6fAH0KY0k/edit
  */
-class B64Builder {
+export default class B64Builder {
   buffer: Buffer;
   pos: number;
   hasSegment: boolean;
@@ -104,5 +102,3 @@ class B64Builder {
     buffer.copy(this.buffer);
   }
 }
-
-module.exports = B64Builder;
diff --git a/packages/metro-source-map/src/BundleBuilder.js b/packages/metro-source-map/src/BundleBuilder.js
index 58fc649537..ad1d38570b 100644
--- a/packages/metro-source-map/src/BundleBuilder.js
+++ b/packages/metro-source-map/src/BundleBuilder.js
@@ -9,8 +9,6 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {IndexMap, IndexMapSection, MixedSourceMap} from './source-map';
 
 const EMPTY_MAP = {
@@ -34,7 +32,7 @@ const EMPTY_MAP = {
  * const code = builder.getCode();
  * const map = builder.getMap();
  */
-class BundleBuilder {
+export class BundleBuilder {
   _file: string;
   _sections: Array<IndexMapSection>;
   _line: number;
@@ -114,7 +112,7 @@ function measureString(str: string): {
   return {lineBreaks, lastLineColumns};
 }
 
-function createIndexMap(
+export function createIndexMap(
   file: string,
   sections: Array<IndexMapSection>,
 ): IndexMap {
@@ -124,5 +122,3 @@ function createIndexMap(
     sections,
   };
 }
-
-module.exports = {BundleBuilder, createIndexMap};
diff --git a/packages/metro-source-map/src/Consumer/AbstractConsumer.js b/packages/metro-source-map/src/Consumer/AbstractConsumer.js
index bb75938d10..13ecaf5f02 100644
--- a/packages/metro-source-map/src/Consumer/AbstractConsumer.js
+++ b/packages/metro-source-map/src/Consumer/AbstractConsumer.js
@@ -9,8 +9,6 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {
   GeneratedPositionLookup,
   IConsumer,
@@ -19,11 +17,11 @@ import type {
   SourcePosition,
 } from './types';
 
-const {GENERATED_ORDER, iterationOrderToString} = require('./constants');
-const invariant = require('invariant');
+import {GENERATED_ORDER, iterationOrderToString} from './constants';
+import invariant from 'invariant';
 
 // Implementation details shared between MappingsConsumer and SectionsConsumer
-class AbstractConsumer implements IConsumer {
+export default class AbstractConsumer implements IConsumer {
   _sourceMap: {+file?: string, ...};
 
   constructor(sourceMap: {+file?: string, ...}) {
@@ -63,5 +61,3 @@ class AbstractConsumer implements IConsumer {
     invariant(false, 'Not implemented');
   }
 }
-
-module.exports = AbstractConsumer;
diff --git a/packages/metro-source-map/src/Consumer/DelegatingConsumer.js b/packages/metro-source-map/src/Consumer/DelegatingConsumer.js
index d2528ba823..b8500edb71 100644
--- a/packages/metro-source-map/src/Consumer/DelegatingConsumer.js
+++ b/packages/metro-source-map/src/Consumer/DelegatingConsumer.js
@@ -9,7 +9,6 @@
  * @oncall react_native
  */
 
-'use strict';
 import type {MixedSourceMap} from '../source-map';
 import type {LookupBias} from './constants.js';
 import type {
@@ -20,20 +19,20 @@ import type {
   SourcePosition,
 } from './types';
 
-const {
+import {
   GENERATED_ORDER,
   GREATEST_LOWER_BOUND,
   LEAST_UPPER_BOUND,
   ORIGINAL_ORDER,
-} = require('./constants');
-const createConsumer = require('./createConsumer');
+} from './constants';
+import createConsumer from './createConsumer';
 
 /**
  * A source map consumer that supports both "basic" and "indexed" source maps.
  * Uses `MappingsConsumer` and `SectionsConsumer` under the hood (via
  * `createConsumer`).
  */
-class DelegatingConsumer implements IConsumer {
+export default class DelegatingConsumer implements IConsumer {
   static +GENERATED_ORDER: IterationOrder = GENERATED_ORDER;
   static +ORIGINAL_ORDER: IterationOrder = ORIGINAL_ORDER;
   static +GREATEST_LOWER_BOUND: LookupBias = GREATEST_LOWER_BOUND;
@@ -74,5 +73,3 @@ class DelegatingConsumer implements IConsumer {
     return this._rootConsumer.sourceContentFor(source, nullOnMissing);
   }
 }
-
-module.exports = DelegatingConsumer;
diff --git a/packages/metro-source-map/src/Consumer/MappingsConsumer.js b/packages/metro-source-map/src/Consumer/MappingsConsumer.js
index c20c2ec012..9768ebb625 100644
--- a/packages/metro-source-map/src/Consumer/MappingsConsumer.js
+++ b/packages/metro-source-map/src/Consumer/MappingsConsumer.js
@@ -9,8 +9,6 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {BasicSourceMap} from '../source-map';
 import type {
   GeneratedPositionLookup,
@@ -20,25 +18,28 @@ import type {
 } from './types';
 import type {Number0} from 'ob1';
 
-const AbstractConsumer = require('./AbstractConsumer');
-const {
+import AbstractConsumer from './AbstractConsumer';
+import {
   EMPTY_POSITION,
   FIRST_COLUMN,
   FIRST_LINE,
   GREATEST_LOWER_BOUND,
   lookupBiasToString,
-} = require('./constants');
-const normalizeSourcePath = require('./normalizeSourcePath');
-const {greatestLowerBound} = require('./search');
-const invariant = require('invariant');
-const {add, add0, get0, inc, sub} = require('ob1');
-const {decode: decodeVlq} = require('vlq');
+} from './constants';
+import normalizeSourcePath from './normalizeSourcePath';
+import {greatestLowerBound} from './search';
+import invariant from 'invariant';
+import {add, add0, get0, inc, sub} from 'ob1';
+import {decode as decodeVlq} from 'vlq';
 
 /**
  * A source map consumer that supports "basic" source maps (that have a
  * `mappings` field and no sections).
  */
-class MappingsConsumer extends AbstractConsumer implements IConsumer {
+export default class MappingsConsumer
+  extends AbstractConsumer
+  implements IConsumer
+{
   _sourceMap: BasicSourceMap;
   _decodedMappings: ?$ReadOnlyArray<Mapping>;
   _normalizedSources: ?$ReadOnlyArray<string>;
@@ -216,5 +217,3 @@ class MappingsConsumer extends AbstractConsumer implements IConsumer {
     return sourcesContent[get0(idx)] ?? null;
   }
 }
-
-module.exports = MappingsConsumer;
diff --git a/packages/metro-source-map/src/Consumer/SectionsConsumer.js b/packages/metro-source-map/src/Consumer/SectionsConsumer.js
index 9c64a5b114..c9faa2dee5 100644
--- a/packages/metro-source-map/src/Consumer/SectionsConsumer.js
+++ b/packages/metro-source-map/src/Consumer/SectionsConsumer.js
@@ -9,8 +9,6 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {IndexMap} from '../source-map';
 import type {
   GeneratedOffset,
@@ -20,18 +18,21 @@ import type {
   SourcePosition,
 } from './types';
 
-const AbstractConsumer = require('./AbstractConsumer');
-const {EMPTY_POSITION, FIRST_COLUMN, FIRST_LINE} = require('./constants');
-const createConsumer = require('./createConsumer');
-const {subtractOffsetFromPosition} = require('./positionMath');
-const {greatestLowerBound} = require('./search');
-const {add, add0, get0, get1, sub, sub1} = require('ob1');
+import AbstractConsumer from './AbstractConsumer';
+import {EMPTY_POSITION, FIRST_COLUMN, FIRST_LINE} from './constants';
+import createConsumer from './createConsumer';
+import {subtractOffsetFromPosition} from './positionMath';
+import {greatestLowerBound} from './search';
+import {add, add0, get0, get1, sub, sub1} from 'ob1';
 
 /**
  * A source map consumer that supports "indexed" source maps (that have a
  * `sections` field and no top-level mappings).
  */
-class SectionsConsumer extends AbstractConsumer implements IConsumer {
+export default class SectionsConsumer
+  extends AbstractConsumer
+  implements IConsumer
+{
   _consumers: $ReadOnlyArray<[GeneratedOffset, IConsumer]>;
 
   constructor(sourceMap: IndexMap) {
@@ -121,5 +122,3 @@ class SectionsConsumer extends AbstractConsumer implements IConsumer {
     return null;
   }
 }
-
-module.exports = SectionsConsumer;
diff --git a/packages/metro-source-map/src/Consumer/constants.js b/packages/metro-source-map/src/Consumer/constants.js
index d7638e2b37..57277a730c 100644
--- a/packages/metro-source-map/src/Consumer/constants.js
+++ b/packages/metro-source-map/src/Consumer/constants.js
@@ -9,11 +9,9 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {Number0, Number1} from 'ob1';
 
-const {add0, add1} = require('ob1');
+import {add0, add1} from 'ob1';
 
 const FIRST_COLUMN: Number0 = add0(0);
 const FIRST_LINE: Number1 = add1(0);
@@ -41,7 +39,7 @@ function lookupBiasToString(x: LookupBias): string {
   return x;
 }
 
-module.exports = {
+export {
   FIRST_COLUMN,
   FIRST_LINE,
   GENERATED_ORDER,
diff --git a/packages/metro-source-map/src/Consumer/createConsumer.js b/packages/metro-source-map/src/Consumer/createConsumer.js
index f1859b3270..62f15f4805 100644
--- a/packages/metro-source-map/src/Consumer/createConsumer.js
+++ b/packages/metro-source-map/src/Consumer/createConsumer.js
@@ -9,20 +9,18 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {MixedSourceMap} from '../source-map';
 import type {IConsumer} from './types';
 
-const invariant = require('invariant');
+import MappingsConsumer from './MappingsConsumer';
+import SectionsConsumer from './SectionsConsumer';
+import invariant from 'invariant';
 
-function createConsumer(sourceMap: MixedSourceMap): IConsumer {
+export default function createConsumer(sourceMap: MixedSourceMap): IConsumer {
   invariant(
     (sourceMap.version: mixed) === '3' || sourceMap.version === 3,
     `Unrecognized source map format version: ${sourceMap.version}`,
   );
-  const MappingsConsumer = require('./MappingsConsumer');
-  const SectionsConsumer = require('./SectionsConsumer');
 
   // eslint-disable-next-line lint/strictly-null
   if (sourceMap.mappings === undefined) {
@@ -30,5 +28,3 @@ function createConsumer(sourceMap: MixedSourceMap): IConsumer {
   }
   return new MappingsConsumer(sourceMap);
 }
-
-module.exports = createConsumer;
diff --git a/packages/metro-source-map/src/Consumer/index.js b/packages/metro-source-map/src/Consumer/index.js
index a5c248a5da..cf3192b65d 100644
--- a/packages/metro-source-map/src/Consumer/index.js
+++ b/packages/metro-source-map/src/Consumer/index.js
@@ -9,9 +9,7 @@
  * @oncall react_native
  */
 
-'use strict';
-
 // Implements an API-compatible subset of source-map's `SourceMapConsumer`.
-const DelegatingConsumer = require('./DelegatingConsumer');
+import DelegatingConsumer from './DelegatingConsumer';
 
-module.exports = DelegatingConsumer;
+export default DelegatingConsumer;
diff --git a/packages/metro-source-map/src/Consumer/normalizeSourcePath.js b/packages/metro-source-map/src/Consumer/normalizeSourcePath.js
index 0f205aa5ca..e3b17262cd 100644
--- a/packages/metro-source-map/src/Consumer/normalizeSourcePath.js
+++ b/packages/metro-source-map/src/Consumer/normalizeSourcePath.js
@@ -9,13 +9,11 @@
  * @oncall react_native
  */
 
-'use strict';
-
 // flowlint-next-line untyped-import:off
-const util = require('source-map/lib/util');
+import util from 'source-map/lib/util';
 
 // Extracted from source-map@0.5.6's SourceMapConsumer
-function normalizeSourcePath(
+export default function normalizeSourcePath(
   sourceInput: string,
   map: {+sourceRoot?: ?string, ...},
 ): string {
@@ -38,5 +36,3 @@ function normalizeSourcePath(
 
   return source;
 }
-
-module.exports = normalizeSourcePath;
diff --git a/packages/metro-source-map/src/Consumer/positionMath.js b/packages/metro-source-map/src/Consumer/positionMath.js
index 653d1c4dee..51dfe19f68 100644
--- a/packages/metro-source-map/src/Consumer/positionMath.js
+++ b/packages/metro-source-map/src/Consumer/positionMath.js
@@ -9,14 +9,12 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {GeneratedOffset} from './types';
 import type {Number0, Number1} from 'ob1';
 
-const {add, add0, add1, neg} = require('ob1');
+import {add, add0, add1, neg} from 'ob1';
 
-function shiftPositionByOffset<
+export function shiftPositionByOffset<
   T: {
     +line: ?Number1,
     +column: ?Number0,
@@ -30,7 +28,7 @@ function shiftPositionByOffset<
   };
 }
 
-function subtractOffsetFromPosition<
+export function subtractOffsetFromPosition<
   T: {
     +line: ?Number1,
     +column: ?Number0,
@@ -48,5 +46,3 @@ function subtractOffsetFromPosition<
     columns: add0(0),
   });
 }
-
-module.exports = {shiftPositionByOffset, subtractOffsetFromPosition};
diff --git a/packages/metro-source-map/src/Consumer/search.js b/packages/metro-source-map/src/Consumer/search.js
index 3d29348d36..28e6af7c9d 100644
--- a/packages/metro-source-map/src/Consumer/search.js
+++ b/packages/metro-source-map/src/Consumer/search.js
@@ -9,9 +9,7 @@
  * @oncall react_native
  */
 
-'use strict';
-
-function greatestLowerBound<T, U>(
+export function greatestLowerBound<T, U>(
   elements: $ReadOnlyArray<T>,
   target: U,
   comparator: (U, T) => number,
@@ -33,5 +31,3 @@ function greatestLowerBound<T, U>(
   }
   return first ? first - 1 : null;
 }
-
-module.exports = {greatestLowerBound};
diff --git a/packages/metro-source-map/src/Consumer/types.js b/packages/metro-source-map/src/Consumer/types.js
index 171ae6ccb6..549f567c14 100644
--- a/packages/metro-source-map/src/Consumer/types.js
+++ b/packages/metro-source-map/src/Consumer/types.js
@@ -9,8 +9,6 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {IterationOrder, LookupBias} from './constants';
 import type {Number0, Number1} from 'ob1';
 
diff --git a/packages/metro-source-map/src/Generator.js b/packages/metro-source-map/src/Generator.js
index d6fc48f3c8..58fee4eef7 100644
--- a/packages/metro-source-map/src/Generator.js
+++ b/packages/metro-source-map/src/Generator.js
@@ -9,15 +9,13 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {
   BasicSourceMap,
   FBSourceFunctionMap,
   FBSourceMetadata,
 } from './source-map';
 
-const B64Builder = require('./B64Builder');
+import B64Builder from './B64Builder';
 
 type FileFlags = $ReadOnly<{
   addToIgnoreList?: boolean,
@@ -34,7 +32,7 @@ type FileFlags = $ReadOnly<{
  *
  * Mappings have to be passed in the order appearance in the generated source.
  */
-class Generator {
+export default class Generator {
   builder: B64Builder;
   last: {
     generatedColumn: number,
@@ -291,5 +289,3 @@ class IndexedSet {
     return Array.from(this.map.keys());
   }
 }
-
-module.exports = Generator;
diff --git a/packages/metro-source-map/src/__tests__/B64Builder-test.js b/packages/metro-source-map/src/__tests__/B64Builder-test.js
index 8ecabd9869..57a93d7709 100644
--- a/packages/metro-source-map/src/__tests__/B64Builder-test.js
+++ b/packages/metro-source-map/src/__tests__/B64Builder-test.js
@@ -9,9 +9,7 @@
  * @oncall react_native
  */
 
-'use strict';
-
-const B64Builder = require('../B64Builder');
+import B64Builder from '../B64Builder';
 
 let builder;
 beforeEach(() => {
diff --git a/packages/metro-source-map/src/__tests__/Consumer-test.js b/packages/metro-source-map/src/__tests__/Consumer-test.js
index 93d163e4cc..b2ab99e8f7 100644
--- a/packages/metro-source-map/src/__tests__/Consumer-test.js
+++ b/packages/metro-source-map/src/__tests__/Consumer-test.js
@@ -13,8 +13,8 @@
 
 import type {MixedSourceMap} from '../source-map';
 
-const Consumer = require('../Consumer');
-const {add0, add1} = require('ob1');
+import Consumer from '../Consumer';
+import {add0, add1} from 'ob1';
 
 const {objectContaining} = expect;
 
diff --git a/packages/metro-source-map/src/__tests__/Generator-test.js b/packages/metro-source-map/src/__tests__/Generator-test.js
index 5f853b9788..73fb990c80 100644
--- a/packages/metro-source-map/src/__tests__/Generator-test.js
+++ b/packages/metro-source-map/src/__tests__/Generator-test.js
@@ -9,9 +9,7 @@
  * @oncall react_native
  */
 
-'use strict';
-
-const Generator = require('../Generator');
+import Generator from '../Generator';
 
 const {objectContaining} = expect;
 
diff --git a/packages/metro-source-map/src/__tests__/composeSourceMaps-test.js b/packages/metro-source-map/src/__tests__/composeSourceMaps-test.js
index ffcc468746..f8bfe8d134 100644
--- a/packages/metro-source-map/src/__tests__/composeSourceMaps-test.js
+++ b/packages/metro-source-map/src/__tests__/composeSourceMaps-test.js
@@ -9,14 +9,14 @@
  * @oncall react_native
  */
 
-'use strict';
 import type {BasicSourceMap, IndexMap, MixedSourceMap} from '../source-map';
 
-const composeSourceMaps = require('../composeSourceMaps');
-const Consumer = require('../Consumer');
+import composeSourceMaps from '../composeSourceMaps';
+import Consumer from '../Consumer';
+import {add0, add1} from 'ob1';
+
 const fs = require('fs');
 const invariant = require('invariant');
-const {add0, add1} = require('ob1');
 const path = require('path');
 const terser = require('terser');
 
diff --git a/packages/metro-source-map/src/__tests__/source-map-test.js b/packages/metro-source-map/src/__tests__/source-map-test.js
index 59dc83afce..664163966c 100644
--- a/packages/metro-source-map/src/__tests__/source-map-test.js
+++ b/packages/metro-source-map/src/__tests__/source-map-test.js
@@ -9,14 +9,8 @@
  * @oncall react_native
  */
 
-'use strict';
-
-const Generator = require('../Generator');
-const {
-  fromRawMappings,
-  toBabelSegments,
-  toSegmentTuple,
-} = require('../source-map');
+import Generator from '../Generator';
+import {fromRawMappings, toBabelSegments, toSegmentTuple} from '../source-map';
 
 describe('flattening mappings / compacting', () => {
   test('flattens simple mappings', () => {
diff --git a/packages/metro-source-map/src/composeSourceMaps.js b/packages/metro-source-map/src/composeSourceMaps.js
index 84935f4492..6a481db8df 100644
--- a/packages/metro-source-map/src/composeSourceMaps.js
+++ b/packages/metro-source-map/src/composeSourceMaps.js
@@ -9,25 +9,27 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {SourcePosition} from './Consumer/types';
 import type {IConsumer, MixedSourceMap} from './source-map';
 import type {Number0, Number1} from 'ob1';
 
-const Consumer = require('./Consumer');
-const {SourceMapGenerator} = require('source-map');
+import Consumer from './Consumer';
+import {SourceMapGenerator} from 'source-map';
 
 // TODO(t67648443): Bypass the `sort-requires` rule for this file because of a dependency cycle.
 Consumer;
 
 // Originally based on https://github.com/jakobwesthoff/source-map-merger
-function composeSourceMaps(
+export default function composeSourceMaps(
   maps: $ReadOnlyArray<MixedSourceMap>,
 ): MixedSourceMap {
   // NOTE: require() here to break dependency cycle
-  const SourceMetadataMapConsumer = require('metro-symbolicate/private/SourceMetadataMapConsumer');
-  const GoogleIgnoreListConsumer = require('metro-symbolicate/private/GoogleIgnoreListConsumer');
+  const SourceMetadataMapConsumer =
+    // eslint-disable-next-line import/no-commonjs
+    require('metro-symbolicate/private/SourceMetadataMapConsumer').default;
+  const GoogleIgnoreListConsumer =
+    // eslint-disable-next-line import/no-commonjs
+    require('metro-symbolicate/private/GoogleIgnoreListConsumer').default;
   if (maps.length < 1) {
     throw new Error('composeSourceMaps: Expected at least one map');
   }
@@ -134,5 +136,3 @@ function findOriginalPosition(
   // $FlowFixMe[incompatible-return] `Number0`, `Number1` is incompatible with number
   return original;
 }
-
-module.exports = composeSourceMaps;
diff --git a/packages/metro-source-map/src/encode.js b/packages/metro-source-map/src/encode.js
index 9720b7400a..3b0f415e54 100644
--- a/packages/metro-source-map/src/encode.js
+++ b/packages/metro-source-map/src/encode.js
@@ -49,8 +49,6 @@
 
 /* eslint-disable no-bitwise */
 
-'use strict';
-
 // A map of values to characters for the b64 encoding
 const CHAR_MAP = [
   0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d,
@@ -119,4 +117,4 @@ function encode(value: number, buffer: Buffer, position: number): number {
   return position;
 }
 
-module.exports = encode;
+export default encode;
diff --git a/packages/metro-source-map/src/generateFunctionMap.js b/packages/metro-source-map/src/generateFunctionMap.js
index ba40550e1c..97ba5036cb 100644
--- a/packages/metro-source-map/src/generateFunctionMap.js
+++ b/packages/metro-source-map/src/generateFunctionMap.js
@@ -9,16 +9,16 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {FBSourceFunctionMap} from './source-map';
 import type {PluginObj} from '@babel/core';
 import type {NodePath} from '@babel/traverse';
 import type {Node} from '@babel/types';
 import type {MetroBabelFileMetadata} from 'metro-babel-transformer';
 
+import B64Builder from './B64Builder';
 // $FlowFixMe[cannot-resolve-module] - resolves to @babel/traverse
 import traverseForGenerateFunctionMap from '@babel/traverse--for-generate-function-map';
+import * as t from '@babel/types';
 import {
   isAssignmentExpression,
   isClassBody,
@@ -42,12 +42,9 @@ import {
   isTypeCastExpression,
   isVariableDeclarator,
 } from '@babel/types';
-
-const B64Builder = require('./B64Builder');
-const t = require('@babel/types');
-const invariant = require('invariant');
-const nullthrows = require('nullthrows');
-const fsPath = require('path');
+import invariant from 'invariant';
+import nullthrows from 'nullthrows';
+import fsPath from 'path';
 
 type Position = {
   line: number,
@@ -590,7 +587,7 @@ function positionGreater(x: Position, y: Position) {
   return x.line > y.line || (x.line === y.line && x.column > y.column);
 }
 
-module.exports = {
+export {
   functionMapBabelPlugin,
   generateFunctionMap,
   generateFunctionMappingsArray,
diff --git a/packages/metro-source-map/src/source-map.js b/packages/metro-source-map/src/source-map.js
index 2f547b8668..6b669dedb1 100644
--- a/packages/metro-source-map/src/source-map.js
+++ b/packages/metro-source-map/src/source-map.js
@@ -9,23 +9,21 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {IConsumer} from './Consumer/types';
 import type {BabelSourceMapSegment} from '@babel/generator';
 
-const {BundleBuilder, createIndexMap} = require('./BundleBuilder');
-const composeSourceMaps = require('./composeSourceMaps');
-const Consumer = require('./Consumer');
+import {BundleBuilder, createIndexMap} from './BundleBuilder';
+import composeSourceMaps from './composeSourceMaps';
+import Consumer from './Consumer';
 // We need to export this for `metro-symbolicate`
-const normalizeSourcePath = require('./Consumer/normalizeSourcePath');
-const {
+import normalizeSourcePath from './Consumer/normalizeSourcePath';
+import {
   functionMapBabelPlugin,
   generateFunctionMap,
-} = require('./generateFunctionMap');
-const Generator = require('./Generator');
+} from './generateFunctionMap';
+import Generator from './Generator';
 // $FlowFixMe[untyped-import] - source-map
-const SourceMap = require('source-map');
+import SourceMap from 'source-map';
 
 export type {IConsumer};
 
@@ -332,7 +330,7 @@ const newline = /\r\n?|\n|\u2028|\u2029/g;
 const countLines = (string: string): number =>
   (string.match(newline) || []).length + 1;
 
-module.exports = {
+export {
   BundleBuilder,
   composeSourceMaps,
   Consumer,
diff --git a/packages/metro-symbolicate/src/ChromeHeapSnapshot.js b/packages/metro-symbolicate/src/ChromeHeapSnapshot.js
index 7ce1029a09..5d1723f640 100644
--- a/packages/metro-symbolicate/src/ChromeHeapSnapshot.js
+++ b/packages/metro-symbolicate/src/ChromeHeapSnapshot.js
@@ -9,9 +9,7 @@
  * @oncall react_native
  */
 
-'use strict';
-
-const invariant = require('invariant');
+import invariant from 'invariant';
 
 type RawBuffer = Array<number | RawBuffer>;
 
@@ -49,7 +47,7 @@ const CHILDREN_FIELD_TYPE = '__CHILDREN__';
 // Care is taken to adhere to the self-describing heap snapshot schema, but
 // we make some additional assumptions based on what Chrome hardcodes (where
 // the format leaves us no other choice).
-class ChromeHeapSnapshotProcessor {
+export class ChromeHeapSnapshotProcessor {
   // The raw snapshot data provided to this processor. Mutable.
   +_snapshotData: ChromeHeapSnapshot;
 
@@ -613,5 +611,3 @@ class ChromeHeapSnapshotRecordIterator
     return this;
   }
 }
-
-module.exports = {ChromeHeapSnapshotProcessor};
diff --git a/packages/metro-symbolicate/src/GoogleIgnoreListConsumer.js b/packages/metro-symbolicate/src/GoogleIgnoreListConsumer.js
index 9133b91483..2ec1794e91 100644
--- a/packages/metro-symbolicate/src/GoogleIgnoreListConsumer.js
+++ b/packages/metro-symbolicate/src/GoogleIgnoreListConsumer.js
@@ -9,11 +9,9 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {BasicSourceMap, IndexMap, MixedSourceMap} from 'metro-source-map';
 
-const {normalizeSourcePath} = require('metro-source-map');
+import {normalizeSourcePath} from 'metro-source-map';
 
 type SourceNameNormalizer = (string, {+sourceRoot?: ?string, ...}) => string;
 
@@ -31,7 +29,7 @@ type SourceNameNormalizer = (string, {+sourceRoot?: ?string, ...}) => string;
   *
   *     new GoogleIgnoreListConsumer(map, source => source) // Don't normalize
   */
-class GoogleIgnoreListConsumer {
+export default class GoogleIgnoreListConsumer {
   constructor(
     map: MixedSourceMap,
     normalizeSourceFn: SourceNameNormalizer = normalizeSourcePath,
@@ -130,5 +128,3 @@ class GoogleIgnoreListConsumer {
     }
   }
 }
-
-module.exports = GoogleIgnoreListConsumer;
diff --git a/packages/metro-symbolicate/src/SourceMetadataMapConsumer.js b/packages/metro-symbolicate/src/SourceMetadataMapConsumer.js
index b9ee3f6ba7..883b36289c 100644
--- a/packages/metro-symbolicate/src/SourceMetadataMapConsumer.js
+++ b/packages/metro-symbolicate/src/SourceMetadataMapConsumer.js
@@ -9,8 +9,6 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {
   BasicSourceMap,
   FBSourceFunctionMap,
@@ -20,8 +18,8 @@ import type {
   MixedSourceMap,
 } from 'metro-source-map';
 
-const {normalizeSourcePath} = require('metro-source-map');
-const vlq = require('vlq');
+import {normalizeSourcePath} from 'metro-source-map';
+import * as vlq from 'vlq';
 
 const METADATA_FIELD_FUNCTIONS = 0;
 
@@ -53,7 +51,7 @@ type MetadataMap = {[source: string]: ?FBSourceMetadata, ...};
  *
  *     new SourceMetadataMapConsumer(map, source => source) // Don't normalize
  */
-class SourceMetadataMapConsumer {
+export default class SourceMetadataMapConsumer {
   constructor(
     map: MixedSourceMap,
     normalizeSourceFn: SourceNameNormalizer = normalizeSourcePath,
@@ -230,5 +228,3 @@ function comparePositions(a: Position, b: Position): number {
   }
   return a.line - b.line;
 }
-
-module.exports = SourceMetadataMapConsumer;
diff --git a/packages/metro-symbolicate/src/Symbolication.js b/packages/metro-symbolicate/src/Symbolication.js
index 7829295f6f..18ab0d1f37 100644
--- a/packages/metro-symbolicate/src/Symbolication.js
+++ b/packages/metro-symbolicate/src/Symbolication.js
@@ -12,17 +12,16 @@
 import type {ChromeHeapSnapshot} from './ChromeHeapSnapshot';
 import type {HermesFunctionOffsets, MixedSourceMap} from 'metro-source-map';
 
+import {ChromeHeapSnapshotProcessor} from './ChromeHeapSnapshot';
+import GoogleIgnoreListConsumer from './GoogleIgnoreListConsumer';
+import SourceMetadataMapConsumer from './SourceMetadataMapConsumer';
+import fs from 'fs';
+import invariant from 'invariant';
+import nullthrows from 'nullthrows';
+import path from 'path';
 // flowlint-next-line untyped-type-import:off
 import {typeof SourceMapConsumer} from 'source-map';
 
-const {ChromeHeapSnapshotProcessor} = require('./ChromeHeapSnapshot');
-const GoogleIgnoreListConsumer = require('./GoogleIgnoreListConsumer');
-const SourceMetadataMapConsumer = require('./SourceMetadataMapConsumer');
-const fs = require('fs');
-const invariant = require('invariant');
-const nullthrows = require('nullthrows');
-const path = require('path');
-
 type SingleMapModuleIds = {
   segmentId: number,
   localId: ?number,
@@ -915,11 +914,11 @@ function symbolicateChromeTrace<ModuleIdsT>(
   return context.symbolicateChromeTrace(traceFile, {stdout, stderr});
 }
 
-module.exports = {
+export {
   createContext,
   unstable_createDirectoryContext,
   getOriginalPositionFor,
-  parseFileName: parseSingleMapFileName,
+  parseSingleMapFileName as parseFileName,
   symbolicate,
   symbolicateProfilerMap,
   symbolicateAttribution,
diff --git a/packages/metro-symbolicate/src/__tests__/ChromeHeapSnapshotProcessor-test.js b/packages/metro-symbolicate/src/__tests__/ChromeHeapSnapshotProcessor-test.js
index ff060f180f..e89bf2e509 100644
--- a/packages/metro-symbolicate/src/__tests__/ChromeHeapSnapshotProcessor-test.js
+++ b/packages/metro-symbolicate/src/__tests__/ChromeHeapSnapshotProcessor-test.js
@@ -13,7 +13,7 @@
 
 import type {ChromeHeapSnapshot} from '../ChromeHeapSnapshot';
 
-const {ChromeHeapSnapshotProcessor} = require('../ChromeHeapSnapshot');
+import {ChromeHeapSnapshotProcessor} from '../ChromeHeapSnapshot';
 
 const SNAPSHOT_COMMON = {
   snapshot: {
diff --git a/packages/metro-symbolicate/src/__tests__/GoogleIgnoreListConsumer-test.js b/packages/metro-symbolicate/src/__tests__/GoogleIgnoreListConsumer-test.js
index 67f3ee230d..d9621a1145 100644
--- a/packages/metro-symbolicate/src/__tests__/GoogleIgnoreListConsumer-test.js
+++ b/packages/metro-symbolicate/src/__tests__/GoogleIgnoreListConsumer-test.js
@@ -9,9 +9,7 @@
  * @oncall react_native
  */
 
-'use strict';
-
-const GoogleIgnoreListConsumer = require('../GoogleIgnoreListConsumer.js');
+import GoogleIgnoreListConsumer from '../GoogleIgnoreListConsumer';
 
 describe('GoogleIgnoreListConsumer', () => {
   test('discards indices beyond the range of the sources array', () => {
diff --git a/packages/metro-symbolicate/src/__tests__/SourceMetadataMapConsumer-test.js b/packages/metro-symbolicate/src/__tests__/SourceMetadataMapConsumer-test.js
index 06409be035..257539a8f2 100644
--- a/packages/metro-symbolicate/src/__tests__/SourceMetadataMapConsumer-test.js
+++ b/packages/metro-symbolicate/src/__tests__/SourceMetadataMapConsumer-test.js
@@ -10,7 +10,7 @@
 
 'use strict';
 
-const SourceMetadataMapConsumer = require('../SourceMetadataMapConsumer.js');
+import SourceMetadataMapConsumer from '../SourceMetadataMapConsumer';
 
 describe('SourceMetadataMapConsumer', () => {
   test('ignores metadata beyond the range of the sources array', () => {
diff --git a/packages/metro-symbolicate/src/__tests__/symbolicate-heap-snapshot-test.js b/packages/metro-symbolicate/src/__tests__/symbolicate-heap-snapshot-test.js
index c9435fafd4..0b7a850a00 100644
--- a/packages/metro-symbolicate/src/__tests__/symbolicate-heap-snapshot-test.js
+++ b/packages/metro-symbolicate/src/__tests__/symbolicate-heap-snapshot-test.js
@@ -9,10 +9,9 @@
  * @oncall react_native
  */
 
-'use strict';
+import symbolicate from '../symbolicate';
 
 const {ChromeHeapSnapshotProcessor} = require('../ChromeHeapSnapshot');
-const symbolicate = require('../symbolicate');
 const fs = require('fs');
 const path = require('path');
 const {PassThrough} = require('stream');
diff --git a/packages/metro-symbolicate/src/__tests__/symbolicate-test.js b/packages/metro-symbolicate/src/__tests__/symbolicate-test.js
index 43521a4ae5..6512b4e731 100644
--- a/packages/metro-symbolicate/src/__tests__/symbolicate-test.js
+++ b/packages/metro-symbolicate/src/__tests__/symbolicate-test.js
@@ -9,9 +9,8 @@
  * @oncall react_native
  */
 
-'use strict';
+import symbolicate from '../symbolicate';
 
-const symbolicate = require('../symbolicate');
 const fs = require('fs');
 const os = require('os');
 const path = require('path');
diff --git a/packages/metro-symbolicate/src/index.js b/packages/metro-symbolicate/src/index.js
index c6ca100843..0035852661 100755
--- a/packages/metro-symbolicate/src/index.js
+++ b/packages/metro-symbolicate/src/index.js
@@ -10,7 +10,7 @@
  * @oncall react_native
  */
 
-'use strict';
+import symbolicate from './symbolicate';
 
 // $FlowFixMe[unused-promise]
-require('./symbolicate.js')().then(code => process.exit(code));
+symbolicate().then(code => process.exit(code));
diff --git a/packages/metro-symbolicate/src/symbolicate.js b/packages/metro-symbolicate/src/symbolicate.js
index f99764e2c5..6792d1c4af 100644
--- a/packages/metro-symbolicate/src/symbolicate.js
+++ b/packages/metro-symbolicate/src/symbolicate.js
@@ -17,13 +17,11 @@
 // In our third form, we symbolicate using a module ID, a line number, and
 // optionally a column.
 
-'use strict';
-
-const Symbolication = require('./Symbolication.js');
-const fs = require('fs');
-// flowlint-next-line untyped-import:off
-const SourceMapConsumer = require('source-map').SourceMapConsumer;
-const {Transform} = require('stream');
+import * as Symbolication from './Symbolication';
+import fs from 'fs';
+// $FlowFixMe[untyped-import] source-map
+import {SourceMapConsumer} from 'source-map';
+import {Transform} from 'stream';
 
 function printHelp() {
   const usages = [
@@ -47,7 +45,7 @@ function printHelp() {
   console.error(usages.join('\n'));
 }
 
-async function main(
+export default async function main(
   argvInput: Array<string> = process.argv.slice(2),
   {
     stdin,
@@ -259,5 +257,3 @@ function waitForStream(stream: $FlowFixMe) {
     stream.on('finish', resolve);
   });
 }
-
-module.exports = main;
diff --git a/packages/metro-transform-plugins/src/__tests__/addParamsToDefineCall-test.js b/packages/metro-transform-plugins/src/__tests__/addParamsToDefineCall-test.js
index 7525b941b4..d5f0ad9d6f 100644
--- a/packages/metro-transform-plugins/src/__tests__/addParamsToDefineCall-test.js
+++ b/packages/metro-transform-plugins/src/__tests__/addParamsToDefineCall-test.js
@@ -9,9 +9,7 @@
  * @oncall react_native
  */
 
-'use strict';
-
-const addParamsToDefineCall = require('../addParamsToDefineCall');
+import addParamsToDefineCall from '../addParamsToDefineCall';
 
 describe('addParamsToDefineCall', () => {
   const input = '__d(function() {}); // SourceMapUrl=something';
diff --git a/packages/metro-transform-plugins/src/__tests__/import-export-plugin-test.js b/packages/metro-transform-plugins/src/__tests__/import-export-plugin-test.js
index bb1da3c56b..7af590b6f3 100644
--- a/packages/metro-transform-plugins/src/__tests__/import-export-plugin-test.js
+++ b/packages/metro-transform-plugins/src/__tests__/import-export-plugin-test.js
@@ -9,15 +9,14 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {Dependency} from 'metro/private/ModuleGraph/worker/collectDependencies';
 
+import collectDependencies from 'metro/private/ModuleGraph/worker/collectDependencies';
+
 const {compare, transformToAst} = require('../__mocks__/test-helpers');
 const importExportPlugin = require('../import-export-plugin');
 // $FlowFixMe[untyped-import] @babel/code-frame
 const {codeFrameColumns} = require('@babel/code-frame');
-const collectDependencies = require('metro/private/ModuleGraph/worker/collectDependencies');
 
 const opts = {
   importAll: '_$$_IMPORT_ALL',
diff --git a/packages/metro-transform-plugins/src/__tests__/inline-requires-plugin-test.js b/packages/metro-transform-plugins/src/__tests__/inline-requires-plugin-test.js
index be6b7c014a..d4771e0283 100644
--- a/packages/metro-transform-plugins/src/__tests__/inline-requires-plugin-test.js
+++ b/packages/metro-transform-plugins/src/__tests__/inline-requires-plugin-test.js
@@ -14,11 +14,11 @@ import type {PluginOptions, State} from '../inline-requires-plugin';
 import type {Plugins} from '@babel/core';
 import type {PluginTesterOptions} from 'babel-plugin-tester';
 
-const inlineRequiresPlugin = require('../inline-requires-plugin');
-const validateOutputAst = require('./validateOutputAst');
-const babel = require('@babel/core');
-const pluginTester = require('babel-plugin-tester');
-const nullthrows = require('nullthrows');
+import inlineRequiresPlugin from '../inline-requires-plugin';
+import validateOutputAst from './validateOutputAst';
+import * as babel from '@babel/core';
+import pluginTester from 'babel-plugin-tester';
+import nullthrows from 'nullthrows';
 
 type TestCases = PluginTesterOptions<PluginOptions, State>['tests'];
 
diff --git a/packages/metro-transform-plugins/src/__tests__/normalizePseudoGlobals-test.js b/packages/metro-transform-plugins/src/__tests__/normalizePseudoGlobals-test.js
index 90bbd860e3..4fb995a166 100644
--- a/packages/metro-transform-plugins/src/__tests__/normalizePseudoGlobals-test.js
+++ b/packages/metro-transform-plugins/src/__tests__/normalizePseudoGlobals-test.js
@@ -9,11 +9,10 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {Options} from '../normalizePseudoGlobals';
 
-const normalizePseudoglobals = require('../normalizePseudoGlobals');
+import normalizePseudoglobals from '../normalizePseudoGlobals';
+
 const {transformFromAstSync, transformSync} = require('@babel/core');
 const nullthrows = require('nullthrows');
 
diff --git a/packages/metro-transform-plugins/src/addParamsToDefineCall.js b/packages/metro-transform-plugins/src/addParamsToDefineCall.js
index 4f6b396762..edbea1677a 100644
--- a/packages/metro-transform-plugins/src/addParamsToDefineCall.js
+++ b/packages/metro-transform-plugins/src/addParamsToDefineCall.js
@@ -9,15 +9,13 @@
  * @oncall react_native
  */
 
-'use strict';
-
 /**
  * Simple way of adding additional parameters to the end of the define calls.
  *
  * This is used to add extra information to the generaic compiled modules (like
  * the dependencyMap object or the list of inverse dependencies).
  */
-function addParamsToDefineCall(
+export default function addParamsToDefineCall(
   code: string,
   ...paramsToAdd: Array<mixed>
 ): string {
@@ -30,5 +28,3 @@ function addParamsToDefineCall(
 
   return code.slice(0, index) + ',' + params.join(',') + code.slice(index);
 }
-
-module.exports = addParamsToDefineCall;
diff --git a/packages/metro-transform-plugins/src/constant-folding-plugin.js b/packages/metro-transform-plugins/src/constant-folding-plugin.js
index 4a6b5679be..fe49f0cea8 100644
--- a/packages/metro-transform-plugins/src/constant-folding-plugin.js
+++ b/packages/metro-transform-plugins/src/constant-folding-plugin.js
@@ -9,8 +9,6 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {PluginObj} from '@babel/core';
 import type {NodePath, VisitNode, Visitor} from '@babel/traverse';
 import typeof Traverse from '@babel/traverse';
@@ -20,7 +18,7 @@ import typeof * as Types from '@babel/types';
 
 type State = {stripped: boolean};
 
-function constantFoldingPlugin(context: {
+export default function constantFoldingPlugin(context: {
   types: Types,
   traverse: Traverse,
   ...
@@ -221,5 +219,3 @@ function constantFoldingPlugin(context: {
 
   return {visitor};
 }
-
-module.exports = constantFoldingPlugin;
diff --git a/packages/metro-transform-plugins/src/import-export-plugin.js b/packages/metro-transform-plugins/src/import-export-plugin.js
index 33d3c44123..635bb8392b 100644
--- a/packages/metro-transform-plugins/src/import-export-plugin.js
+++ b/packages/metro-transform-plugins/src/import-export-plugin.js
@@ -9,8 +9,6 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {PluginObj} from '@babel/core';
 import type {NodePath} from '@babel/traverse';
 import type {
@@ -24,8 +22,8 @@ import type {
 // eslint-disable-next-line import/no-extraneous-dependencies
 import typeof * as Types from '@babel/types';
 
-const template = require('@babel/template').default;
-const nullthrows = require('nullthrows');
+import template from '@babel/template';
+import nullthrows from 'nullthrows';
 
 export type Options = $ReadOnly<{
   importDefault: string,
@@ -151,7 +149,12 @@ function withLocation(
   return node;
 }
 
-function importExportPlugin({types: t}: {types: Types, ...}): PluginObj<State> {
+export default function importExportPlugin({
+  types: t,
+}: {
+  types: Types,
+  ...
+}): PluginObj<State> {
   const {isDeclaration, isVariableDeclaration} = t;
 
   return {
@@ -586,5 +589,3 @@ function importExportPlugin({types: t}: {types: Types, ...}): PluginObj<State> {
     },
   };
 }
-
-module.exports = importExportPlugin;
diff --git a/packages/metro-transform-plugins/src/index.js b/packages/metro-transform-plugins/src/index.js
index 53cccd88a3..5c81425462 100644
--- a/packages/metro-transform-plugins/src/index.js
+++ b/packages/metro-transform-plugins/src/index.js
@@ -9,6 +9,8 @@
  * @oncall react_native
  */
 
+/* eslint-disable import/no-commonjs */
+
 'use strict';
 
 import typeof ConstantFoldingPlugin from './constant-folding-plugin';
@@ -34,27 +36,27 @@ type TransformPlugins = {
 module.exports = ({
   // $FlowFixMe[unsafe-getters-setters]
   get addParamsToDefineCall() {
-    return require('./addParamsToDefineCall');
+    return require('./addParamsToDefineCall').default;
   },
   // $FlowFixMe[unsafe-getters-setters]
   get constantFoldingPlugin() {
-    return require('./constant-folding-plugin');
+    return require('./constant-folding-plugin').default;
   },
   // $FlowFixMe[unsafe-getters-setters]
   get importExportPlugin() {
-    return require('./import-export-plugin');
+    return require('./import-export-plugin').default;
   },
   // $FlowFixMe[unsafe-getters-setters]
   get inlinePlugin() {
-    return require('./inline-plugin');
+    return require('./inline-plugin').default;
   },
   // $FlowFixMe[unsafe-getters-setters]
   get inlineRequiresPlugin() {
-    return require('./inline-requires-plugin');
+    return require('./inline-requires-plugin').default;
   },
   // $FlowFixMe[unsafe-getters-setters]
   get normalizePseudoGlobals() {
-    return require('./normalizePseudoGlobals');
+    return require('./normalizePseudoGlobals').default;
   },
   getTransformPluginCacheKeyFiles: () => [
     require.resolve(__filename),
diff --git a/packages/metro-transform-plugins/src/inline-plugin.js b/packages/metro-transform-plugins/src/inline-plugin.js
index 48603b46c2..1410778e2d 100644
--- a/packages/metro-transform-plugins/src/inline-plugin.js
+++ b/packages/metro-transform-plugins/src/inline-plugin.js
@@ -9,8 +9,6 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {PluginObj} from '@babel/core';
 import type {Binding, NodePath, Scope} from '@babel/traverse';
 import type {
@@ -23,7 +21,7 @@ import type {
 // eslint-disable-next-line import/no-extraneous-dependencies
 import typeof * as Types from '@babel/types';
 
-const createInlinePlatformChecks = require('./utils/createInlinePlatformChecks');
+import createInlinePlatformChecks from './utils/createInlinePlatformChecks';
 
 export type Options = $ReadOnly<{
   dev: boolean,
@@ -41,7 +39,7 @@ const processId = {name: 'process'};
 
 const dev = {name: '__DEV__'};
 
-function inlinePlugin(
+export default function inlinePlugin(
   {types: t}: {types: Types},
   options: Options,
 ): PluginObj<State> {
@@ -177,5 +175,3 @@ function inlinePlugin(
     },
   };
 }
-
-module.exports = inlinePlugin;
diff --git a/packages/metro-transform-plugins/src/inline-requires-plugin.js b/packages/metro-transform-plugins/src/inline-requires-plugin.js
index cba26fd35d..508425e547 100644
--- a/packages/metro-transform-plugins/src/inline-requires-plugin.js
+++ b/packages/metro-transform-plugins/src/inline-requires-plugin.js
@@ -8,8 +8,6 @@
  * @flow strict
  */
 
-'use strict';
-
 import type {PluginObj} from '@babel/core';
 import typeof * as Babel from '@babel/core';
 import type {NodePath, Scope} from '@babel/traverse';
@@ -59,7 +57,7 @@ export type State = {
  * Is also successfully inlined into:
  *     g(require('foo').Baz);
  */
-module.exports = ({types: t, traverse}: Babel): PluginObj<State> => ({
+export default ({types: t, traverse}: Babel): PluginObj<State> => ({
   name: 'inline-requires',
   visitor: {
     Program: {
diff --git a/packages/metro-transform-plugins/src/normalizePseudoGlobals.js b/packages/metro-transform-plugins/src/normalizePseudoGlobals.js
index b37262ec51..333f4cace2 100644
--- a/packages/metro-transform-plugins/src/normalizePseudoGlobals.js
+++ b/packages/metro-transform-plugins/src/normalizePseudoGlobals.js
@@ -9,19 +9,17 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {NodePath, Scope} from '@babel/traverse';
 import type {Program} from '@babel/types';
 
-const traverse = require('@babel/traverse').default;
-const nullthrows = require('nullthrows');
+import traverse from '@babel/traverse';
+import nullthrows from 'nullthrows';
 
 export type Options = {
   reservedNames: $ReadOnlyArray<string>,
 };
 
-function normalizePseudoglobals(
+export default function normalizePseudoglobals(
   ast: BabelNode,
   options?: Options,
 ): $ReadOnlyArray<string> {
@@ -126,5 +124,3 @@ function rename(fullName: string, shortName: string, scope: Scope): string {
 
   return unusedName;
 }
-
-module.exports = normalizePseudoglobals;
diff --git a/packages/metro-transform-plugins/src/utils/createInlinePlatformChecks.js b/packages/metro-transform-plugins/src/utils/createInlinePlatformChecks.js
index ccedf1eb62..933aec166d 100644
--- a/packages/metro-transform-plugins/src/utils/createInlinePlatformChecks.js
+++ b/packages/metro-transform-plugins/src/utils/createInlinePlatformChecks.js
@@ -9,8 +9,6 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {Scope} from '@babel/traverse';
 import type {CallExpression, MemberExpression} from '@babel/types';
 // Type only import. No runtime dependency
@@ -32,7 +30,7 @@ type PlatformChecks = {
   ) => boolean,
 };
 
-function createInlinePlatformChecks(
+export default function createInlinePlatformChecks(
   t: Types,
   requireName: string = 'require',
 ): PlatformChecks {
@@ -184,5 +182,3 @@ function createInlinePlatformChecks(
     isPlatformSelectNode,
   };
 }
-
-module.exports = createInlinePlatformChecks;
diff --git a/packages/metro-transform-worker/src/__tests__/index-test.js b/packages/metro-transform-worker/src/__tests__/index-test.js
index 0b5e97038c..b9a540c65e 100644
--- a/packages/metro-transform-worker/src/__tests__/index-test.js
+++ b/packages/metro-transform-worker/src/__tests__/index-test.js
@@ -29,7 +29,7 @@ jest
   .mock('metro-minify-terser');
 
 import type {JsTransformerConfig, JsTransformOptions} from '../index';
-import typeof TransformerType from '../index';
+import typeof * as TransformerType from '../index';
 import typeof FSType from 'fs';
 
 const {Buffer} = require('buffer');
diff --git a/packages/metro-transform-worker/src/index.js b/packages/metro-transform-worker/src/index.js
index 48eb40ca54..615eacc16c 100644
--- a/packages/metro-transform-worker/src/index.js
+++ b/packages/metro-transform-worker/src/index.js
@@ -9,8 +9,6 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {PluginEntry, Plugins} from '@babel/core';
 import type {
   BabelTransformer,
@@ -35,31 +33,32 @@ import type {
   DynamicRequiresBehavior,
 } from 'metro/private/ModuleGraph/worker/collectDependencies';
 
-const getMinifier = require('./utils/getMinifier');
-const {transformFromAstSync} = require('@babel/core');
-const generate = require('@babel/generator').default;
-const babylon = require('@babel/parser');
-const types = require('@babel/types');
-const {stableHash} = require('metro-cache');
-const {getCacheKey} = require('metro-cache-key');
-const {
+import * as assetTransformer from './utils/assetTransformer';
+import getMinifier from './utils/getMinifier';
+import {transformFromAstSync} from '@babel/core';
+import generate from '@babel/generator';
+import * as babylon from '@babel/parser';
+import * as types from '@babel/types';
+import {stableHash} from 'metro-cache';
+import {getCacheKey as metroGetCacheKey} from 'metro-cache-key';
+import {
   fromRawMappings,
   functionMapBabelPlugin,
   toBabelSegments,
   toSegmentTuple,
-} = require('metro-source-map');
-const metroTransformPlugins = require('metro-transform-plugins');
-const collectDependencies = require('metro/private/ModuleGraph/worker/collectDependencies');
-const {
-  InvalidRequireCallError: InternalInvalidRequireCallError,
-} = require('metro/private/ModuleGraph/worker/collectDependencies');
-const generateImportNames = require('metro/private/ModuleGraph/worker/generateImportNames');
-const {
+} from 'metro-source-map';
+import metroTransformPlugins from 'metro-transform-plugins';
+import collectDependencies from 'metro/private/ModuleGraph/worker/collectDependencies';
+import generateImportNames from 'metro/private/ModuleGraph/worker/generateImportNames';
+import {
   importLocationsPlugin,
   locToKey,
-} = require('metro/private/ModuleGraph/worker/importLocationsPlugin');
-const JsFileWrapping = require('metro/private/ModuleGraph/worker/JsFileWrapping');
-const nullthrows = require('nullthrows');
+} from 'metro/private/ModuleGraph/worker/importLocationsPlugin';
+import * as JsFileWrapping from 'metro/private/ModuleGraph/worker/JsFileWrapping';
+import nullthrows from 'nullthrows';
+
+const InternalInvalidRequireCallError =
+  collectDependencies.InvalidRequireCallError;
 
 type MinifierConfig = $ReadOnly<{[string]: mixed, ...}>;
 
@@ -517,7 +516,6 @@ async function transformAsset(
   file: AssetFile,
   context: TransformationContext,
 ): Promise<TransformResponse> {
-  const assetTransformer = require('./utils/assetTransformer');
   const {assetRegistryPath, assetPlugins} = context.config;
 
   const result = await assetTransformer.transform(
@@ -653,98 +651,96 @@ function getBabelTransformArgs(
   };
 }
 
-module.exports = {
-  transform: async (
-    config: JsTransformerConfig,
-    projectRoot: string,
-    filename: string,
-    data: Buffer,
-    options: JsTransformOptions,
-  ): Promise<TransformResponse> => {
-    const context: TransformationContext = {
-      config,
-      projectRoot,
-      options,
-    };
-    const sourceCode = data.toString('utf8');
-
-    const reservedStrings = [];
-    if (
-      options.customTransformOptions?.unstable_staticHermesOptimizedRequire ==
-      true
-    ) {
-      reservedStrings.push('_$$_METRO_MODULE_ID');
-    }
-    if (config.unstable_dependencyMapReservedName != null) {
-      reservedStrings.push(config.unstable_dependencyMapReservedName);
-    }
-    for (const reservedString of reservedStrings) {
-      const position = sourceCode.indexOf(reservedString);
-      if (position > -1) {
-        throw new SyntaxError(
-          'Source code contains the reserved string `' +
-            reservedString +
-            '` at character offset ' +
-            position,
-        );
-      }
-    }
-
-    if (filename.endsWith('.json')) {
-      const jsonFile: JSONFile = {
-        filename,
-        inputFileSize: data.length,
-        code: sourceCode,
-        type: options.type,
-      };
+export const transform = async (
+  config: JsTransformerConfig,
+  projectRoot: string,
+  filename: string,
+  data: Buffer,
+  options: JsTransformOptions,
+): Promise<TransformResponse> => {
+  const context: TransformationContext = {
+    config,
+    projectRoot,
+    options,
+  };
+  const sourceCode = data.toString('utf8');
 
-      return await transformJSON(jsonFile, context);
+  const reservedStrings = [];
+  if (
+    options.customTransformOptions?.unstable_staticHermesOptimizedRequire ==
+    true
+  ) {
+    reservedStrings.push('_$$_METRO_MODULE_ID');
+  }
+  if (config.unstable_dependencyMapReservedName != null) {
+    reservedStrings.push(config.unstable_dependencyMapReservedName);
+  }
+  for (const reservedString of reservedStrings) {
+    const position = sourceCode.indexOf(reservedString);
+    if (position > -1) {
+      throw new SyntaxError(
+        'Source code contains the reserved string `' +
+          reservedString +
+          '` at character offset ' +
+          position,
+      );
     }
+  }
 
-    if (options.type === 'asset') {
-      const file: AssetFile = {
-        filename,
-        inputFileSize: data.length,
-        code: sourceCode,
-        type: options.type,
-      };
+  if (filename.endsWith('.json')) {
+    const jsonFile: JSONFile = {
+      filename,
+      inputFileSize: data.length,
+      code: sourceCode,
+      type: options.type,
+    };
 
-      return await transformAsset(file, context);
-    }
+    return await transformJSON(jsonFile, context);
+  }
 
-    const file: JSFile = {
+  if (options.type === 'asset') {
+    const file: AssetFile = {
       filename,
       inputFileSize: data.length,
       code: sourceCode,
-      type: options.type === 'script' ? 'js/script' : 'js/module',
-      functionMap: null,
+      type: options.type,
     };
 
-    return await transformJSWithBabel(file, context);
-  },
-
-  getCacheKey: (config: JsTransformerConfig): string => {
-    const {babelTransformerPath, minifierPath, ...remainingConfig} = config;
-
-    const filesKey = getCacheKey([
-      __filename,
-      require.resolve(babelTransformerPath),
-      require.resolve(minifierPath),
-      require.resolve('./utils/getMinifier'),
-      require.resolve('./utils/assetTransformer'),
-      require.resolve('metro/private/ModuleGraph/worker/generateImportNames'),
-      require.resolve('metro/private/ModuleGraph/worker/JsFileWrapping'),
-      ...metroTransformPlugins.getTransformPluginCacheKeyFiles(),
-    ]);
+    return await transformAsset(file, context);
+  }
+
+  const file: JSFile = {
+    filename,
+    inputFileSize: data.length,
+    code: sourceCode,
+    type: options.type === 'script' ? 'js/script' : 'js/module',
+    functionMap: null,
+  };
+
+  return await transformJSWithBabel(file, context);
+};
+
+export const getCacheKey = (config: JsTransformerConfig): string => {
+  const {babelTransformerPath, minifierPath, ...remainingConfig} = config;
+
+  const filesKey = metroGetCacheKey([
+    __filename,
+    require.resolve(babelTransformerPath),
+    require.resolve(minifierPath),
+    require.resolve('./utils/getMinifier'),
+    require.resolve('./utils/assetTransformer'),
+    require.resolve('metro/private/ModuleGraph/worker/generateImportNames'),
+    require.resolve('metro/private/ModuleGraph/worker/JsFileWrapping'),
+    ...metroTransformPlugins.getTransformPluginCacheKeyFiles(),
+  ]);
 
-    // $FlowFixMe[unsupported-syntax]
-    const babelTransformer = require(babelTransformerPath);
-    return [
-      filesKey,
-      stableHash(remainingConfig).toString('hex'),
-      babelTransformer.getCacheKey ? babelTransformer.getCacheKey() : '',
-    ].join('$');
-  },
+  // $FlowFixMe[unsupported-syntax]
+  const babelTransformer = require(babelTransformerPath);
+  return [
+    filesKey,
+    stableHash(remainingConfig).toString('hex'),
+    babelTransformer.getCacheKey ? babelTransformer.getCacheKey() : '',
+  ].join('$');
 };
 
 function countLinesAndTerminateMap(
diff --git a/packages/metro-transform-worker/src/utils/assetTransformer.js b/packages/metro-transform-worker/src/utils/assetTransformer.js
index 5d0d8386b4..9312a518d3 100644
--- a/packages/metro-transform-worker/src/utils/assetTransformer.js
+++ b/packages/metro-transform-worker/src/utils/assetTransformer.js
@@ -9,16 +9,14 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {File} from '@babel/types';
 import type {BabelTransformerArgs} from 'metro-babel-transformer';
 
-const {getAssetData} = require('metro/private/Assets');
-const {generateAssetCodeFileAst} = require('metro/private/Bundler/util');
-const path = require('path');
+import {getAssetData} from 'metro/private/Assets';
+import {generateAssetCodeFileAst} from 'metro/private/Bundler/util';
+import path from 'path';
 
-async function transform(
+export async function transform(
   {filename, options, src}: BabelTransformerArgs,
   assetRegistryPath: string,
   assetDataPlugins: $ReadOnlyArray<string>,
@@ -44,7 +42,3 @@ async function transform(
     ast: generateAssetCodeFileAst(assetRegistryPath, data),
   };
 }
-
-module.exports = {
-  transform,
-};
diff --git a/packages/metro-transform-worker/src/utils/getMinifier.js b/packages/metro-transform-worker/src/utils/getMinifier.js
index 0ab856bc56..61fb8915b1 100644
--- a/packages/metro-transform-worker/src/utils/getMinifier.js
+++ b/packages/metro-transform-worker/src/utils/getMinifier.js
@@ -9,11 +9,9 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {Minifier} from '../index.js';
 
-function getMinifier(minifierPath: string): Minifier {
+export default function getMinifier(minifierPath: string): Minifier {
   // Note: minifierPath should be an absolute path OR a module name here!
   // The options allow relative paths but they HAVE to be normalized at
   // any entry point that accepts them...
@@ -29,5 +27,3 @@ function getMinifier(minifierPath: string): Minifier {
     );
   }
 }
-
-module.exports = getMinifier;
diff --git a/packages/metro/src/Assets.js b/packages/metro/src/Assets.js
index bef30fd5c4..a2b21c2bdf 100644
--- a/packages/metro/src/Assets.js
+++ b/packages/metro/src/Assets.js
@@ -9,15 +9,13 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {AssetPath} from './node-haste/lib/AssetPaths';
 
-const AssetPaths = require('./node-haste/lib/AssetPaths');
-const crypto = require('crypto');
-const fs = require('fs');
-const getImageSize = require('image-size');
-const path = require('path');
+import * as AssetPaths from './node-haste/lib/AssetPaths';
+import crypto from 'crypto';
+import fs from 'fs';
+import getImageSize from 'image-size';
+import path from 'path';
 
 export type AssetInfo = {
   +files: Array<string>,
@@ -53,7 +51,7 @@ export type AssetDataFiltered = {
 
 // Test extension against all types supported by image-size module.
 // If it's not one of these, we won't treat it as an image.
-function isAssetTypeAnImage(type: string): boolean {
+export function isAssetTypeAnImage(type: string): boolean {
   return (
     [
       'png',
@@ -70,7 +68,7 @@ function isAssetTypeAnImage(type: string): boolean {
   );
 }
 
-function getAssetSize(
+export function getAssetSize(
   type: string,
   content: Buffer,
   filePath: string,
@@ -198,7 +196,7 @@ async function getAbsoluteAssetInfo(
   return {files, hash: hasher.digest('hex'), name, scales, type};
 }
 
-async function getAssetData(
+export async function getAssetData(
   assetPath: string,
   localPath: string,
   assetDataPlugins: $ReadOnlyArray<string>,
@@ -259,7 +257,7 @@ async function applyAssetDataPlugins(
 /**
  * Returns all the associated files (for different resolutions) of an asset.
  **/
-async function getAssetFiles(
+export async function getAssetFiles(
   assetPath: string,
   platform: ?string = null,
 ): Promise<Array<string>> {
@@ -279,7 +277,7 @@ async function getAssetFiles(
  * 3. Then try to pick platform-specific asset records
  * 4. Then pick the closest resolution (rounding up) to the requested one
  */
-async function getAsset(
+export async function getAsset(
   relativePath: string,
   projectRoot: string,
   watchFolders: $ReadOnlyArray<string>,
@@ -328,11 +326,3 @@ function pathBelongsToRoots(
 
   return false;
 }
-
-module.exports = {
-  getAsset,
-  getAssetSize,
-  getAssetData,
-  getAssetFiles,
-  isAssetTypeAnImage,
-};
diff --git a/packages/metro/src/Bundler.js b/packages/metro/src/Bundler.js
index ee387749f8..b70ef7cd64 100644
--- a/packages/metro/src/Bundler.js
+++ b/packages/metro/src/Bundler.js
@@ -9,22 +9,20 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {TransformResultWithSource} from './DeltaBundler';
 import type {TransformOptions} from './DeltaBundler/Worker';
 import type EventEmitter from 'events';
 import type {ConfigT} from 'metro-config';
 
-const Transformer = require('./DeltaBundler/Transformer');
-const DependencyGraph = require('./node-haste/DependencyGraph');
+import Transformer from './DeltaBundler/Transformer';
+import DependencyGraph from './node-haste/DependencyGraph';
 
 export type BundlerOptions = $ReadOnly<{
   hasReducedPerformance?: boolean,
   watch?: boolean,
 }>;
 
-class Bundler {
+export default class Bundler {
   _depGraph: DependencyGraph;
   _initializedPromise: Promise<void>;
   _transformer: Transformer;
@@ -90,5 +88,3 @@ class Bundler {
     await this._initializedPromise;
   }
 }
-
-module.exports = Bundler;
diff --git a/packages/metro/src/Bundler/util.js b/packages/metro/src/Bundler/util.js
index d7a70b2e9e..7883f871d0 100644
--- a/packages/metro/src/Bundler/util.js
+++ b/packages/metro/src/Bundler/util.js
@@ -9,15 +9,13 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {AssetDataFiltered, AssetDataWithoutFiles} from '../Assets';
 import type {ModuleTransportLike} from '../shared/types';
 import type {File} from '@babel/types';
 
-const babylon = require('@babel/parser');
-const template = require('@babel/template').default;
-const babelTypes = require('@babel/types');
+import * as babylon from '@babel/parser';
+import template from '@babel/template';
+import * as babelTypes from '@babel/types';
 
 type SubTree<T: ModuleTransportLike> = (
   moduleTransport: T,
@@ -26,7 +24,7 @@ type SubTree<T: ModuleTransportLike> = (
 
 const assetPropertyBlockList = new Set(['files', 'fileSystemLocation', 'path']);
 
-function generateAssetCodeFileAst(
+export function generateAssetCodeFileAst(
   assetRegistryPath: string,
   assetDescriptor: AssetDataWithoutFiles,
 ): File {
@@ -68,7 +66,7 @@ function filterObject(
   return copied;
 }
 
-function createRamBundleGroups<T: ModuleTransportLike>(
+export function createRamBundleGroups<T: ModuleTransportLike>(
   ramGroups: $ReadOnlyArray<string>,
   groupableModules: $ReadOnlyArray<T>,
   subtree: SubTree<T>,
@@ -146,8 +144,3 @@ class ArrayMap<K, V> extends Map<K, Array<V>> {
     return array;
   }
 }
-
-module.exports = {
-  createRamBundleGroups,
-  generateAssetCodeFileAst,
-};
diff --git a/packages/metro/src/DeltaBundler.js b/packages/metro/src/DeltaBundler.js
index 5c8b723977..cec7500757 100644
--- a/packages/metro/src/DeltaBundler.js
+++ b/packages/metro/src/DeltaBundler.js
@@ -9,8 +9,6 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {
   DeltaResult,
   Graph,
@@ -21,7 +19,7 @@ import type {
 } from './DeltaBundler/types';
 import type EventEmitter from 'events';
 
-const DeltaCalculator = require('./DeltaBundler/DeltaCalculator');
+import DeltaCalculator from './DeltaBundler/DeltaCalculator';
 
 export type {
   DeltaResult,
@@ -42,7 +40,7 @@ export type {
  * concurrent clients requesting their own deltas. This is done through the
  * `clientId` param (which maps a client to a specific delta transformer).
  */
-class DeltaBundler<T = MixedOutput> {
+export default class DeltaBundler<T = MixedOutput> {
   _changeEventSource: EventEmitter;
   _deltaCalculators: Map<Graph<T>, DeltaCalculator<T>> = new Map();
 
@@ -140,5 +138,3 @@ class DeltaBundler<T = MixedOutput> {
     this._deltaCalculators.delete(graph);
   }
 }
-
-module.exports = DeltaBundler;
diff --git a/packages/metro/src/DeltaBundler/DeltaCalculator.js b/packages/metro/src/DeltaBundler/DeltaCalculator.js
index 2afa231ef0..f7a6551231 100644
--- a/packages/metro/src/DeltaBundler/DeltaCalculator.js
+++ b/packages/metro/src/DeltaBundler/DeltaCalculator.js
@@ -9,17 +9,16 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {DeltaResult, Options} from './types';
 import type {RootPerfLogger} from 'metro-config';
 import type {ChangeEvent} from 'metro-file-map';
 
 import {Graph} from './Graph';
+import EventEmitter from 'events';
 import path from 'path';
 
+// eslint-disable-next-line import/no-commonjs
 const debug = require('debug')('Metro:DeltaCalculator');
-const {EventEmitter} = require('events');
 
 /**
  * This class is in charge of calculating the delta of changed modules that
@@ -27,7 +26,7 @@ const {EventEmitter} = require('events');
  * traverse the files that have been changed between calls and avoid having to
  * traverse the whole dependency tree for trivial small changes.
  */
-class DeltaCalculator<T> extends EventEmitter {
+export default class DeltaCalculator<T> extends EventEmitter {
   _changeEventSource: EventEmitter;
   _options: Options<T>;
 
@@ -324,5 +323,3 @@ class DeltaCalculator<T> extends EventEmitter {
     };
   }
 }
-
-module.exports = DeltaCalculator;
diff --git a/packages/metro/src/DeltaBundler/Graph.js b/packages/metro/src/DeltaBundler/Graph.js
index cee5307173..c28a31c91a 100644
--- a/packages/metro/src/DeltaBundler/Graph.js
+++ b/packages/metro/src/DeltaBundler/Graph.js
@@ -47,9 +47,8 @@ import {fileMatchesContext} from '../lib/contextModule';
 import CountingSet from '../lib/CountingSet';
 import {isResolvedDependency} from '../lib/isResolvedDependency';
 import {buildSubgraph} from './buildSubgraph';
-
-const invariant = require('invariant');
-const nullthrows = require('nullthrows');
+import invariant from 'invariant';
+import nullthrows from 'nullthrows';
 
 // TODO: Convert to a Flow enum
 type NodeColor =
diff --git a/packages/metro/src/DeltaBundler/Serializers/__tests__/baseJSBundle-test.js b/packages/metro/src/DeltaBundler/Serializers/__tests__/baseJSBundle-test.js
index 8692551378..c9dbd8ca0e 100644
--- a/packages/metro/src/DeltaBundler/Serializers/__tests__/baseJSBundle-test.js
+++ b/packages/metro/src/DeltaBundler/Serializers/__tests__/baseJSBundle-test.js
@@ -9,14 +9,12 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {Module, TransformInputOptions} from '../../types';
 
 import CountingSet from '../../../lib/CountingSet';
+import createModuleIdFactory from '../../../lib/createModuleIdFactory';
+import baseJSBundle from '../baseJSBundle';
 
-const createModuleIdFactory = require('../../../lib/createModuleIdFactory');
-const baseJSBundle = require('../baseJSBundle');
 const path = require('path');
 
 const {objectContaining} = expect;
diff --git a/packages/metro/src/DeltaBundler/Serializers/__tests__/getAllFiles-test.js b/packages/metro/src/DeltaBundler/Serializers/__tests__/getAllFiles-test.js
index 33ef463b4f..1c1989a6e0 100644
--- a/packages/metro/src/DeltaBundler/Serializers/__tests__/getAllFiles-test.js
+++ b/packages/metro/src/DeltaBundler/Serializers/__tests__/getAllFiles-test.js
@@ -8,12 +8,10 @@
  * @oncall react_native
  */
 
-'use strict';
-
 jest.mock('../../../Assets');
 
-const {getAssetFiles} = require('../../../Assets');
-const getAllFiles = require('../getAllFiles');
+import {getAssetFiles} from '../../../Assets';
+import getAllFiles from '../getAllFiles';
 
 describe('getOrderedDependencyPaths', () => {
   beforeEach(() => {
diff --git a/packages/metro/src/DeltaBundler/Serializers/__tests__/getAssets-test.js b/packages/metro/src/DeltaBundler/Serializers/__tests__/getAssets-test.js
index f27ccd0b59..c13c148b66 100644
--- a/packages/metro/src/DeltaBundler/Serializers/__tests__/getAssets-test.js
+++ b/packages/metro/src/DeltaBundler/Serializers/__tests__/getAssets-test.js
@@ -8,12 +8,10 @@
  * @oncall react_native
  */
 
-'use strict';
-
 jest.mock('../../../Assets');
 
-const {getAssetData} = require('../../../Assets');
-const getAssets = require('../getAssets');
+import {getAssetData} from '../../../Assets';
+import getAssets from '../getAssets';
 
 beforeEach(() => {
   getAssetData.mockImplementation(async (path, localPath) => ({
diff --git a/packages/metro/src/DeltaBundler/Serializers/__tests__/getRamBundleInfo-test.js b/packages/metro/src/DeltaBundler/Serializers/__tests__/getRamBundleInfo-test.js
index 9cc2104342..1710a651c6 100644
--- a/packages/metro/src/DeltaBundler/Serializers/__tests__/getRamBundleInfo-test.js
+++ b/packages/metro/src/DeltaBundler/Serializers/__tests__/getRamBundleInfo-test.js
@@ -9,14 +9,11 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {Module, TransformInputOptions} from '../../types';
 import type {JsOutput} from 'metro-transform-worker';
 
 import CountingSet from '../../../lib/CountingSet';
-
-const getRamBundleInfo = require('../getRamBundleInfo');
+import getRamBundleInfo from '../getRamBundleInfo';
 
 function createModule(
   name: string,
diff --git a/packages/metro/src/DeltaBundler/Serializers/baseJSBundle.js b/packages/metro/src/DeltaBundler/Serializers/baseJSBundle.js
index a194380286..6dc3cd3ee2 100644
--- a/packages/metro/src/DeltaBundler/Serializers/baseJSBundle.js
+++ b/packages/metro/src/DeltaBundler/Serializers/baseJSBundle.js
@@ -9,8 +9,6 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {
   MixedOutput,
   Module,
@@ -19,10 +17,10 @@ import type {
 } from '../types';
 import type {Bundle} from 'metro-runtime/src/modules/types';
 
-const getAppendScripts = require('../../lib/getAppendScripts');
-const processModules = require('./helpers/processModules');
+import getAppendScripts from '../../lib/getAppendScripts';
+import processModules from './helpers/processModules';
 
-function baseJSBundle(
+export default function baseJSBundle(
   entryPoint: string,
   preModules: $ReadOnlyArray<Module<>>,
   graph: ReadOnlyGraph<>,
@@ -83,5 +81,3 @@ function baseJSBundle(
     ).map(([module, code]) => [options.createModuleId(module.path), code]),
   };
 }
-
-module.exports = baseJSBundle;
diff --git a/packages/metro/src/DeltaBundler/Serializers/getAllFiles.js b/packages/metro/src/DeltaBundler/Serializers/getAllFiles.js
index ea6f0b5cc6..cf6ef087ad 100644
--- a/packages/metro/src/DeltaBundler/Serializers/getAllFiles.js
+++ b/packages/metro/src/DeltaBundler/Serializers/getAllFiles.js
@@ -9,19 +9,17 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {Module, ReadOnlyGraph} from '../types';
 
-const {getAssetFiles} = require('../../Assets');
-const {getJsOutput, isJsModule} = require('./helpers/js');
+import {getAssetFiles} from '../../Assets';
+import {getJsOutput, isJsModule} from './helpers/js';
 
 type Options = {
   platform: ?string,
   +processModuleFilter: (module: Module<>) => boolean,
 };
 
-async function getAllFiles(
+export default async function getAllFiles(
   pre: $ReadOnlyArray<Module<>>,
   graph: ReadOnlyGraph<>,
   options: Options,
@@ -58,5 +56,3 @@ async function getAllFiles(
 
   return output;
 }
-
-module.exports = getAllFiles;
diff --git a/packages/metro/src/DeltaBundler/Serializers/getAssets.js b/packages/metro/src/DeltaBundler/Serializers/getAssets.js
index 6fff55042e..ef33b1b9bd 100644
--- a/packages/metro/src/DeltaBundler/Serializers/getAssets.js
+++ b/packages/metro/src/DeltaBundler/Serializers/getAssets.js
@@ -9,14 +9,12 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {AssetData} from '../../Assets';
 import type {Module, ReadOnlyDependencies} from '../types';
 
-const {getAssetData} = require('../../Assets');
-const {getJsOutput, isJsModule} = require('./helpers/js');
-const path = require('path');
+import {getAssetData} from '../../Assets';
+import {getJsOutput, isJsModule} from './helpers/js';
+import path from 'path';
 
 type Options = {
   +processModuleFilter: (module: Module<>) => boolean,
@@ -26,7 +24,7 @@ type Options = {
   publicPath: string,
 };
 
-async function getAssets(
+export default async function getAssets(
   dependencies: ReadOnlyDependencies<>,
   options: Options,
 ): Promise<$ReadOnlyArray<AssetData>> {
@@ -54,5 +52,3 @@ async function getAssets(
 
   return await Promise.all(promises);
 }
-
-module.exports = getAssets;
diff --git a/packages/metro/src/DeltaBundler/Serializers/getExplodedSourceMap.js b/packages/metro/src/DeltaBundler/Serializers/getExplodedSourceMap.js
index e106ac3fa3..f92e3759fb 100644
--- a/packages/metro/src/DeltaBundler/Serializers/getExplodedSourceMap.js
+++ b/packages/metro/src/DeltaBundler/Serializers/getExplodedSourceMap.js
@@ -9,15 +9,13 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {Module} from '../types';
 import type {
   FBSourceFunctionMap,
   MetroSourceMapSegmentTuple,
 } from 'metro-source-map';
 
-const {getJsOutput, isJsModule} = require('./helpers/js');
+import {getJsOutput, isJsModule} from './helpers/js';
 
 export type ExplodedSourceMap = $ReadOnlyArray<{
   +map: Array<MetroSourceMapSegmentTuple>,
@@ -26,7 +24,7 @@ export type ExplodedSourceMap = $ReadOnlyArray<{
   +path: string,
 }>;
 
-function getExplodedSourceMap(
+export function getExplodedSourceMap(
   modules: $ReadOnlyArray<Module<>>,
   options: {
     +processModuleFilter: (module: Module<>) => boolean,
@@ -47,7 +45,3 @@ function getExplodedSourceMap(
   }
   return result;
 }
-
-module.exports = {
-  getExplodedSourceMap,
-};
diff --git a/packages/metro/src/DeltaBundler/Serializers/getRamBundleInfo.js b/packages/metro/src/DeltaBundler/Serializers/getRamBundleInfo.js
index a36ae9366b..bf49e4aca5 100644
--- a/packages/metro/src/DeltaBundler/Serializers/getRamBundleInfo.js
+++ b/packages/metro/src/DeltaBundler/Serializers/getRamBundleInfo.js
@@ -9,20 +9,18 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {ModuleTransportLike, RamModuleTransport} from '../../shared/types';
 import type {Module, ReadOnlyGraph, SerializerOptions} from '../types';
 import type {SourceMapGeneratorOptions} from './sourceMapGenerator';
 import type {GetTransformOptions} from 'metro-config';
 
-const {createRamBundleGroups} = require('../../Bundler/util');
-const getAppendScripts = require('../../lib/getAppendScripts');
-const getTransitiveDependencies = require('./helpers/getTransitiveDependencies');
-const {isJsModule, wrapModule} = require('./helpers/js');
-const {sourceMapObject} = require('./sourceMapObject');
-const nullthrows = require('nullthrows');
-const path = require('path');
+import {createRamBundleGroups} from '../../Bundler/util';
+import getAppendScripts from '../../lib/getAppendScripts';
+import getTransitiveDependencies from './helpers/getTransitiveDependencies';
+import {isJsModule, wrapModule} from './helpers/js';
+import {sourceMapObject} from './sourceMapObject';
+import nullthrows from 'nullthrows';
+import path from 'path';
 
 type Options = $ReadOnly<{
   ...SerializerOptions,
@@ -38,7 +36,7 @@ export type RamBundleInfo = {
   groups: Map<number, Set<number>>,
 };
 
-async function getRamBundleInfo(
+export default async function getRamBundleInfo(
   entryPoint: string,
   pre: $ReadOnlyArray<Module<>>,
   graph: ReadOnlyGraph<>,
@@ -171,5 +169,3 @@ async function _getRamOptions(
     ramGroups: ramGroups || [],
   };
 }
-
-module.exports = getRamBundleInfo;
diff --git a/packages/metro/src/DeltaBundler/Serializers/helpers/__tests__/getTransitiveDependencies-test.js b/packages/metro/src/DeltaBundler/Serializers/helpers/__tests__/getTransitiveDependencies-test.js
index 9e04725960..36a58620ee 100644
--- a/packages/metro/src/DeltaBundler/Serializers/helpers/__tests__/getTransitiveDependencies-test.js
+++ b/packages/metro/src/DeltaBundler/Serializers/helpers/__tests__/getTransitiveDependencies-test.js
@@ -10,7 +10,7 @@
 
 'use strict';
 
-const getTransitiveDependencies = require('../getTransitiveDependencies');
+import getTransitiveDependencies from '../getTransitiveDependencies';
 
 function createModule(name, dependencies, type = 'module') {
   return [
diff --git a/packages/metro/src/DeltaBundler/Serializers/helpers/getInlineSourceMappingURL.js b/packages/metro/src/DeltaBundler/Serializers/helpers/getInlineSourceMappingURL.js
index 411c252e7c..b79f293d31 100644
--- a/packages/metro/src/DeltaBundler/Serializers/helpers/getInlineSourceMappingURL.js
+++ b/packages/metro/src/DeltaBundler/Serializers/helpers/getInlineSourceMappingURL.js
@@ -9,11 +9,7 @@
  * @oncall react_native
  */
 
-'use strict';
-
-function getInlineSourceMappingURL(sourceMap: string): string {
+export default function getInlineSourceMappingURL(sourceMap: string): string {
   const base64 = Buffer.from(sourceMap).toString('base64');
   return `data:application/json;charset=utf-8;base64,${base64}`;
 }
-
-module.exports = getInlineSourceMappingURL;
diff --git a/packages/metro/src/DeltaBundler/Serializers/helpers/getSourceMapInfo.js b/packages/metro/src/DeltaBundler/Serializers/helpers/getSourceMapInfo.js
index cfee382f42..54069121d2 100644
--- a/packages/metro/src/DeltaBundler/Serializers/helpers/getSourceMapInfo.js
+++ b/packages/metro/src/DeltaBundler/Serializers/helpers/getSourceMapInfo.js
@@ -9,17 +9,15 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {Module} from '../../types';
 import type {
   FBSourceFunctionMap,
   MetroSourceMapSegmentTuple,
 } from 'metro-source-map';
 
-const {getJsOutput} = require('./js');
+import {getJsOutput} from './js';
 
-function getSourceMapInfo(
+export default function getSourceMapInfo(
   module: Module<>,
   options: {
     +excludeSource: boolean,
@@ -50,5 +48,3 @@ function getModuleSource(module: Module<>): string {
 
   return module.getSource().toString();
 }
-
-module.exports = getSourceMapInfo;
diff --git a/packages/metro/src/DeltaBundler/Serializers/helpers/getTransitiveDependencies.js b/packages/metro/src/DeltaBundler/Serializers/helpers/getTransitiveDependencies.js
index a3d756a1e8..dcea05ddfa 100644
--- a/packages/metro/src/DeltaBundler/Serializers/helpers/getTransitiveDependencies.js
+++ b/packages/metro/src/DeltaBundler/Serializers/helpers/getTransitiveDependencies.js
@@ -9,13 +9,11 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {ReadOnlyGraph} from '../../types';
 
 import {isResolvedDependency} from '../../../lib/isResolvedDependency';
 
-function getTransitiveDependencies<T>(
+export default function getTransitiveDependencies<T>(
   path: string,
   graph: ReadOnlyGraph<T>,
 ): Set<string> {
@@ -53,5 +51,3 @@ function _getDeps<T>(
 
   return deps;
 }
-
-module.exports = getTransitiveDependencies;
diff --git a/packages/metro/src/DeltaBundler/Serializers/helpers/js.js b/packages/metro/src/DeltaBundler/Serializers/helpers/js.js
index 83a6654adb..c2b564e814 100644
--- a/packages/metro/src/DeltaBundler/Serializers/helpers/js.js
+++ b/packages/metro/src/DeltaBundler/Serializers/helpers/js.js
@@ -9,16 +9,14 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {MixedOutput, Module} from '../../types';
 import type {JsOutput} from 'metro-transform-worker';
 
-const {isResolvedDependency} = require('../../../lib/isResolvedDependency');
-const invariant = require('invariant');
-const jscSafeUrl = require('jsc-safe-url');
-const {addParamsToDefineCall} = require('metro-transform-plugins');
-const path = require('path');
+import {isResolvedDependency} from '../../../lib/isResolvedDependency';
+import invariant from 'invariant';
+import * as jscSafeUrl from 'jsc-safe-url';
+import {addParamsToDefineCall} from 'metro-transform-plugins';
+import path from 'path';
 
 export type Options = $ReadOnly<{
   createModuleId: string => number | string,
@@ -30,7 +28,7 @@ export type Options = $ReadOnly<{
   ...
 }>;
 
-function wrapModule(module: Module<>, options: Options): string {
+export function wrapModule(module: Module<>, options: Options): string {
   const output = getJsOutput(module);
 
   if (output.type.startsWith('js/script')) {
@@ -41,7 +39,10 @@ function wrapModule(module: Module<>, options: Options): string {
   return addParamsToDefineCall(output.data.code, ...params);
 }
 
-function getModuleParams(module: Module<>, options: Options): Array<mixed> {
+export function getModuleParams(
+  module: Module<>,
+  options: Options,
+): Array<mixed> {
   const moduleId = options.createModuleId(module.path);
 
   const paths: {[moduleID: number | string]: mixed} = {};
@@ -110,7 +111,7 @@ function getModuleParams(module: Module<>, options: Options): Array<mixed> {
   return params;
 }
 
-function getJsOutput(
+export function getJsOutput(
   module: $ReadOnly<{
     output: $ReadOnlyArray<MixedOutput>,
     path?: string,
@@ -138,17 +139,10 @@ function getJsOutput(
   return jsOutput;
 }
 
-function isJsModule(module: Module<>): boolean {
+export function isJsModule(module: Module<>): boolean {
   return module.output.filter(isJsOutput).length > 0;
 }
 
 function isJsOutput(output: MixedOutput): boolean {
   return output.type.startsWith('js/');
 }
-
-module.exports = {
-  getJsOutput,
-  getModuleParams,
-  isJsModule,
-  wrapModule,
-};
diff --git a/packages/metro/src/DeltaBundler/Serializers/helpers/processModules.js b/packages/metro/src/DeltaBundler/Serializers/helpers/processModules.js
index ce4e19966b..2abab37b73 100644
--- a/packages/metro/src/DeltaBundler/Serializers/helpers/processModules.js
+++ b/packages/metro/src/DeltaBundler/Serializers/helpers/processModules.js
@@ -9,13 +9,11 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {Module} from '../../types';
 
-const {isJsModule, wrapModule} = require('./js');
+import {isJsModule, wrapModule} from './js';
 
-function processModules(
+export default function processModules(
   modules: $ReadOnlyArray<Module<>>,
   {
     filter = () => true,
@@ -50,5 +48,3 @@ function processModules(
       }),
     ]);
 }
-
-module.exports = processModules;
diff --git a/packages/metro/src/DeltaBundler/Serializers/hmrJSBundle.js b/packages/metro/src/DeltaBundler/Serializers/hmrJSBundle.js
index 90bbd18490..b5db0ebf91 100644
--- a/packages/metro/src/DeltaBundler/Serializers/hmrJSBundle.js
+++ b/packages/metro/src/DeltaBundler/Serializers/hmrJSBundle.js
@@ -9,17 +9,15 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {EntryPointURL} from '../../HmrServer';
 import type {DeltaResult, Module, ReadOnlyGraph} from '../types';
 import type {HmrModule} from 'metro-runtime/src/modules/types';
 
-const {isJsModule, wrapModule} = require('./helpers/js');
-const jscSafeUrl = require('jsc-safe-url');
-const {addParamsToDefineCall} = require('metro-transform-plugins');
-const path = require('path');
-const url = require('url');
+import {isJsModule, wrapModule} from './helpers/js';
+import * as jscSafeUrl from 'jsc-safe-url';
+import {addParamsToDefineCall} from 'metro-transform-plugins';
+import path from 'path';
+import url from 'url';
 
 type Options = $ReadOnly<{
   clientUrl: EntryPointURL,
@@ -131,7 +129,7 @@ function getInverseDependencies(
   return inverseDependencies;
 }
 
-function hmrJSBundle(
+export default function hmrJSBundle(
   delta: DeltaResult<>,
   graph: ReadOnlyGraph<>,
   options: Options,
@@ -148,5 +146,3 @@ function hmrJSBundle(
     ),
   };
 }
-
-module.exports = hmrJSBundle;
diff --git a/packages/metro/src/DeltaBundler/Serializers/sourceMapGenerator.js b/packages/metro/src/DeltaBundler/Serializers/sourceMapGenerator.js
index bfdf811988..f1c40c4ec3 100644
--- a/packages/metro/src/DeltaBundler/Serializers/sourceMapGenerator.js
+++ b/packages/metro/src/DeltaBundler/Serializers/sourceMapGenerator.js
@@ -9,16 +9,11 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {Module} from '../types';
 
-const getSourceMapInfo = require('./helpers/getSourceMapInfo');
-const {isJsModule} = require('./helpers/js');
-const {
-  fromRawMappings,
-  fromRawMappingsNonBlocking,
-} = require('metro-source-map');
+import getSourceMapInfo from './helpers/getSourceMapInfo';
+import {isJsModule} from './helpers/js';
+import {fromRawMappings, fromRawMappingsNonBlocking} from 'metro-source-map';
 
 export type SourceMapGeneratorOptions = $ReadOnly<{
   excludeSource: boolean,
@@ -113,7 +108,4 @@ async function sourceMapGeneratorNonBlocking(
   return fromRawMappingsNonBlocking(sourceMapInfos);
 }
 
-module.exports = {
-  sourceMapGenerator,
-  sourceMapGeneratorNonBlocking,
-};
+export {sourceMapGenerator, sourceMapGeneratorNonBlocking};
diff --git a/packages/metro/src/DeltaBundler/Serializers/sourceMapObject.js b/packages/metro/src/DeltaBundler/Serializers/sourceMapObject.js
index 3be66657d4..822ef30d02 100644
--- a/packages/metro/src/DeltaBundler/Serializers/sourceMapObject.js
+++ b/packages/metro/src/DeltaBundler/Serializers/sourceMapObject.js
@@ -9,16 +9,14 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {Module} from '../types';
 import type {SourceMapGeneratorOptions} from './sourceMapGenerator';
 import type {MixedSourceMap} from 'metro-source-map';
 
-const {
+import {
   sourceMapGenerator,
   sourceMapGeneratorNonBlocking,
-} = require('./sourceMapGenerator');
+} from './sourceMapGenerator';
 
 function sourceMapObject(
   modules: $ReadOnlyArray<Module<>>,
@@ -40,7 +38,4 @@ async function sourceMapObjectNonBlocking(
   });
 }
 
-module.exports = {
-  sourceMapObject,
-  sourceMapObjectNonBlocking,
-};
+export {sourceMapObject, sourceMapObjectNonBlocking};
diff --git a/packages/metro/src/DeltaBundler/Serializers/sourceMapString.js b/packages/metro/src/DeltaBundler/Serializers/sourceMapString.js
index 4202e7ac1e..0baf6b1cf8 100644
--- a/packages/metro/src/DeltaBundler/Serializers/sourceMapString.js
+++ b/packages/metro/src/DeltaBundler/Serializers/sourceMapString.js
@@ -9,15 +9,13 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {Module} from '../types';
 import type {SourceMapGeneratorOptions} from './sourceMapGenerator';
 
-const {
+import {
   sourceMapGenerator,
   sourceMapGeneratorNonBlocking,
-} = require('./sourceMapGenerator');
+} from './sourceMapGenerator';
 
 function sourceMapString(
   modules: $ReadOnlyArray<Module<>>,
@@ -38,7 +36,4 @@ async function sourceMapStringNonBlocking(
   });
 }
 
-module.exports = {
-  sourceMapString,
-  sourceMapStringNonBlocking,
-};
+export {sourceMapString, sourceMapStringNonBlocking};
diff --git a/packages/metro/src/DeltaBundler/Transformer.js b/packages/metro/src/DeltaBundler/Transformer.js
index dc4c73b49a..00d9e87d1c 100644
--- a/packages/metro/src/DeltaBundler/Transformer.js
+++ b/packages/metro/src/DeltaBundler/Transformer.js
@@ -9,27 +9,26 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {TransformResult, TransformResultWithSource} from '../DeltaBundler';
 import type {TransformerConfig, TransformOptions} from './Worker';
 import type {ConfigT} from 'metro-config';
 
+import getTransformCacheKey from './getTransformCacheKey';
+import WorkerFarm from './WorkerFarm';
+import assert from 'assert';
 import crypto from 'crypto';
+import fs from 'fs';
+import {Cache, stableHash} from 'metro-cache';
+import path from 'path';
 
-const getTransformCacheKey = require('./getTransformCacheKey');
-const WorkerFarm = require('./WorkerFarm');
-const assert = require('assert');
+// eslint-disable-next-line import/no-commonjs
 const debug = require('debug')('Metro:Transformer');
-const fs = require('fs');
-const {Cache, stableHash} = require('metro-cache');
-const path = require('path');
 
 type GetOrComputeSha1Fn = string => Promise<
   $ReadOnly<{content?: Buffer, sha1: string}>,
 >;
 
-class Transformer {
+export default class Transformer {
   _config: ConfigT;
   _cache: Cache<TransformResult<>>;
   _baseHash: string;
@@ -212,5 +211,3 @@ function verifyRootExists(root: string): void {
   // Verify that the root exists.
   assert(fs.statSync(root).isDirectory(), 'Root has to be a valid directory');
 }
-
-module.exports = Transformer;
diff --git a/packages/metro/src/DeltaBundler/Worker.flow.js b/packages/metro/src/DeltaBundler/Worker.flow.js
index 8fc0541cc1..0bcb528c32 100644
--- a/packages/metro/src/DeltaBundler/Worker.flow.js
+++ b/packages/metro/src/DeltaBundler/Worker.flow.js
@@ -9,8 +9,6 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {TransformResult} from './types';
 import type {LogEntry} from 'metro-core/private/Logger';
 import type {
@@ -18,17 +16,13 @@ import type {
   JsTransformOptions,
 } from 'metro-transform-worker';
 
-const traverse = require('@babel/traverse').default;
-const crypto = require('crypto');
-const fs = require('fs');
-const path = require('path');
+import traverse from '@babel/traverse';
+import crypto from 'crypto';
+import fs from 'fs';
+import path from 'path';
 
 export type {JsTransformOptions as TransformOptions} from 'metro-transform-worker';
 
-export type Worker = {
-  +transform: typeof transform,
-};
-
 type TransformerInterface = {
   transform(
     JsTransformerConfig,
@@ -72,13 +66,13 @@ function asDeserializedBuffer(value: any): Buffer | null {
   return null;
 }
 
-async function transform(
+export const transform = (
   filename: string,
   transformOptions: JsTransformOptions,
   projectRoot: string,
   transformerConfig: TransformerConfig,
   fileBuffer?: Buffer,
-): Promise<Data> {
+): Promise<Data> => {
   let data;
 
   const fileBufferObject = asDeserializedBuffer(fileBuffer);
@@ -94,7 +88,11 @@ async function transform(
     projectRoot,
     transformerConfig,
   );
-}
+};
+
+export type Worker = {
+  +transform: typeof transform,
+};
 
 async function transformFile(
   filename: string,
@@ -160,7 +158,3 @@ function getEndLogEntry(startLogEntry: LogEntry, filename: string): LogEntry {
     log_entry_label: 'Transforming file',
   };
 }
-
-module.exports = ({
-  transform,
-}: Worker);
diff --git a/packages/metro/src/DeltaBundler/Worker.js b/packages/metro/src/DeltaBundler/Worker.js
index 3b5718dbc8..bf5c1b00ea 100644
--- a/packages/metro/src/DeltaBundler/Worker.js
+++ b/packages/metro/src/DeltaBundler/Worker.js
@@ -9,6 +9,8 @@
  * @oncall react_native
  */
 
+/* eslint-disable import/no-commonjs */
+
 'use strict';
 
 /*::
diff --git a/packages/metro/src/DeltaBundler/WorkerFarm.js b/packages/metro/src/DeltaBundler/WorkerFarm.js
index e0869df637..29da1f2665 100644
--- a/packages/metro/src/DeltaBundler/WorkerFarm.js
+++ b/packages/metro/src/DeltaBundler/WorkerFarm.js
@@ -9,15 +9,13 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {TransformResult} from '../DeltaBundler';
 import type {TransformerConfig, TransformOptions, Worker} from './Worker';
 import type {ConfigT} from 'metro-config';
 import type {Readable} from 'stream';
 
-const {Worker: JestWorker} = require('jest-worker');
-const {Logger} = require('metro-core');
+import {Worker as JestWorker} from 'jest-worker';
+import {Logger} from 'metro-core';
 
 type WorkerInterface = {
   getStdout(): Readable,
@@ -31,7 +29,7 @@ type TransformerResult = $ReadOnly<{
   sha1: string,
 }>;
 
-class WorkerFarm {
+export default class WorkerFarm {
   _config: ConfigT;
   _transformerConfig: TransformerConfig;
   _worker: WorkerInterface | Worker;
@@ -63,6 +61,7 @@ class WorkerFarm {
 
       this._worker = worker;
     } else {
+      // eslint-disable-next-line import/no-commonjs
       this._worker = (require('./Worker'): Worker);
     }
   }
@@ -180,5 +179,3 @@ class TransformError extends SyntaxError {
     Error.captureStackTrace && Error.captureStackTrace(this, TransformError);
   }
 }
-
-module.exports = WorkerFarm;
diff --git a/packages/metro/src/DeltaBundler/__tests__/DeltaBundler-test.js b/packages/metro/src/DeltaBundler/__tests__/DeltaBundler-test.js
index bd033451f0..780ae3cc29 100644
--- a/packages/metro/src/DeltaBundler/__tests__/DeltaBundler-test.js
+++ b/packages/metro/src/DeltaBundler/__tests__/DeltaBundler-test.js
@@ -9,12 +9,11 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {MixedOutput, Options, TransformResultDependency} from '../types';
 
-const DeltaBundler = require('../../DeltaBundler');
-const DeltaCalculator = require('../DeltaCalculator');
+import DeltaBundler from '../../DeltaBundler';
+import DeltaCalculator from '../DeltaCalculator';
+
 const {EventEmitter} = require('events');
 
 jest.mock('../DeltaCalculator');
diff --git a/packages/metro/src/DeltaBundler/__tests__/DeltaCalculator-context-test.js b/packages/metro/src/DeltaBundler/__tests__/DeltaCalculator-context-test.js
index 34132c9a5d..7181bea140 100644
--- a/packages/metro/src/DeltaBundler/__tests__/DeltaCalculator-context-test.js
+++ b/packages/metro/src/DeltaBundler/__tests__/DeltaCalculator-context-test.js
@@ -15,9 +15,9 @@ import type {Result} from '../Graph';
 import type {Options, TransformResultDependency} from '../types';
 
 import CountingSet from '../../lib/CountingSet';
+import DeltaCalculator from '../DeltaCalculator';
 import {Graph} from '../Graph';
 
-const DeltaCalculator = require('../DeltaCalculator');
 const {EventEmitter} = require('events');
 
 const traverseDependencies = jest.spyOn(
diff --git a/packages/metro/src/DeltaBundler/__tests__/DeltaCalculator-test.js b/packages/metro/src/DeltaBundler/__tests__/DeltaCalculator-test.js
index b296d826ac..3fef3e9c5d 100644
--- a/packages/metro/src/DeltaBundler/__tests__/DeltaCalculator-test.js
+++ b/packages/metro/src/DeltaBundler/__tests__/DeltaCalculator-test.js
@@ -203,7 +203,7 @@ describe.each(['linux', 'win32'])('DeltaCalculator (%s)', osPlatform => {
       };
     });
 
-    const DeltaCalculator = require('../DeltaCalculator');
+    const DeltaCalculator = require('../DeltaCalculator').default;
 
     // $FlowFixMe[underconstrained-implicit-instantiation]
     deltaCalculator = new DeltaCalculator(
diff --git a/packages/metro/src/DeltaBundler/__tests__/Transformer-test.js b/packages/metro/src/DeltaBundler/__tests__/Transformer-test.js
index 3eb024fccf..1a59581ac8 100644
--- a/packages/metro/src/DeltaBundler/__tests__/Transformer-test.js
+++ b/packages/metro/src/DeltaBundler/__tests__/Transformer-test.js
@@ -18,10 +18,11 @@ jest
   .mock('../WorkerFarm')
   .mock('/path/to/transformer.js', () => ({}), {virtual: true});
 
-var Transformer = require('../Transformer');
-var fs = require('fs');
-var {getDefaultValues} = require('metro-config').getDefaultConfig;
-var {mergeConfig} = require('metro-config/private/loadConfig');
+// Must be required after mocks above
+const Transformer = require('../Transformer').default;
+const fs = require('fs');
+const {getDefaultValues} = require('metro-config').getDefaultConfig;
+const {mergeConfig} = require('metro-config/private/loadConfig');
 
 describe('Transformer', function () {
   let watchFolders;
@@ -74,7 +75,7 @@ describe('Transformer', function () {
       {getOrComputeSha1},
     );
 
-    require('../WorkerFarm').prototype.transform.mockReturnValue({
+    require('../WorkerFarm').default.prototype.transform.mockReturnValue({
       sha1: 'abcdefabcdefabcdefabcdefabcdefabcdefabcd',
       result: {},
     });
@@ -123,7 +124,7 @@ describe('Transformer', function () {
       {getOrComputeSha1},
     );
 
-    require('../WorkerFarm').prototype.transform.mockReturnValue({
+    require('../WorkerFarm').default.prototype.transform.mockReturnValue({
       sha1: 'abcdefabcdefabcdefabcdefabcdefabcdefabcd',
       result: {},
     });
@@ -163,7 +164,7 @@ describe('Transformer', function () {
       {getOrComputeSha1},
     );
 
-    require('../WorkerFarm').prototype.transform.mockReturnValue({
+    require('../WorkerFarm').default.prototype.transform.mockReturnValue({
       sha1: 'abcdefabcdefabcdefabcdefabcdefabcdefabcd',
       result: {},
     });
@@ -204,7 +205,7 @@ describe('Transformer', function () {
       {getOrComputeSha1},
     );
 
-    require('../WorkerFarm').prototype.transform.mockReturnValue({
+    require('../WorkerFarm').default.prototype.transform.mockReturnValue({
       sha1: 'abcdefabcdefabcdefabcdefabcdefabcdefabcd',
       result: {},
     });
diff --git a/packages/metro/src/DeltaBundler/__tests__/WorkerFarm-test.js b/packages/metro/src/DeltaBundler/__tests__/WorkerFarm-test.js
index 5104075098..c35c84d576 100644
--- a/packages/metro/src/DeltaBundler/__tests__/WorkerFarm-test.js
+++ b/packages/metro/src/DeltaBundler/__tests__/WorkerFarm-test.js
@@ -55,7 +55,7 @@ describe('Worker Farm', function () {
       return api;
     });
 
-    WorkerFarm = require('../WorkerFarm');
+    WorkerFarm = require('../WorkerFarm').default;
   });
 
   test('passes transform data to the worker farm when transforming', async () => {
diff --git a/packages/metro/src/DeltaBundler/__tests__/mergeDeltas-test.js b/packages/metro/src/DeltaBundler/__tests__/mergeDeltas-test.js
index 931ac09c32..9cefc9e6bc 100644
--- a/packages/metro/src/DeltaBundler/__tests__/mergeDeltas-test.js
+++ b/packages/metro/src/DeltaBundler/__tests__/mergeDeltas-test.js
@@ -9,9 +9,7 @@
  * @oncall react_native
  */
 
-'use strict';
-
-const mergeDeltas = require('../mergeDeltas');
+import mergeDeltas from '../mergeDeltas';
 
 function sortById<T>([id1]: [number, T], [id2]: [number, T]): number {
   return id1 - id2;
diff --git a/packages/metro/src/DeltaBundler/__tests__/resolver-test.js b/packages/metro/src/DeltaBundler/__tests__/resolver-test.js
index 597ae29f01..44c770c161 100644
--- a/packages/metro/src/DeltaBundler/__tests__/resolver-test.js
+++ b/packages/metro/src/DeltaBundler/__tests__/resolver-test.js
@@ -115,7 +115,7 @@ function dep(name: string): TransformResultDependency {
   };
 
   async function createResolver(config: InputConfigT = {}, platform?: string) {
-    const DependencyGraph = require('../../node-haste/DependencyGraph');
+    const DependencyGraph = require('../../node-haste/DependencyGraph').default;
     const dependencyGraph = new DependencyGraph(
       mergeConfig(await getDefaultConfig(p('/root')), defaultConfig, config),
     );
diff --git a/packages/metro/src/DeltaBundler/getTransformCacheKey.js b/packages/metro/src/DeltaBundler/getTransformCacheKey.js
index 9574efab87..cc1ef90eac 100644
--- a/packages/metro/src/DeltaBundler/getTransformCacheKey.js
+++ b/packages/metro/src/DeltaBundler/getTransformCacheKey.js
@@ -9,20 +9,20 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {TransformerConfig} from './Worker';
 import type {JsTransformerConfig} from 'metro-transform-worker';
 
+import crypto from 'crypto';
+import {getCacheKey} from 'metro-cache-key';
+
+// eslint-disable-next-line import/no-commonjs
 const VERSION = require('../../package.json').version;
-const crypto = require('crypto');
-const {getCacheKey} = require('metro-cache-key');
 
 type CacheKeyProvider = {
   getCacheKey?: JsTransformerConfig => string,
 };
 
-function getTransformCacheKey(opts: {
+export default function getTransformCacheKey(opts: {
   +cacheVersion: string,
   +projectRoot: string,
   +transformerConfig: TransformerConfig,
@@ -49,5 +49,3 @@ function getTransformCacheKey(opts: {
     )
     .digest('hex');
 }
-
-module.exports = getTransformCacheKey;
diff --git a/packages/metro/src/DeltaBundler/mergeDeltas.js b/packages/metro/src/DeltaBundler/mergeDeltas.js
index dc3f952eda..cc71e9654f 100644
--- a/packages/metro/src/DeltaBundler/mergeDeltas.js
+++ b/packages/metro/src/DeltaBundler/mergeDeltas.js
@@ -9,11 +9,12 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {DeltaBundle} from 'metro-runtime/src/modules/types';
 
-function mergeDeltas(delta1: DeltaBundle, delta2: DeltaBundle): DeltaBundle {
+export default function mergeDeltas(
+  delta1: DeltaBundle,
+  delta2: DeltaBundle,
+): DeltaBundle {
   const added1 = new Map(delta1.added);
   const modified1 = new Map(delta1.modified);
   const deleted1 = new Set(delta1.deleted);
@@ -70,5 +71,3 @@ function mergeDeltas(delta1: DeltaBundle, delta2: DeltaBundle): DeltaBundle {
     deleted: [...deleted],
   };
 }
-
-module.exports = mergeDeltas;
diff --git a/packages/metro/src/DeltaBundler/types.js b/packages/metro/src/DeltaBundler/types.js
index ce06388cc5..b39a5ad162 100644
--- a/packages/metro/src/DeltaBundler/types.js
+++ b/packages/metro/src/DeltaBundler/types.js
@@ -9,8 +9,6 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {RequireContext} from '../lib/contextModule';
 import type {RequireContextParams} from '../ModuleGraph/worker/collectDependencies';
 import type {Graph} from './Graph';
diff --git a/packages/metro/src/HmrServer.js b/packages/metro/src/HmrServer.js
index 526aa2aca9..285906bfd9 100644
--- a/packages/metro/src/HmrServer.js
+++ b/packages/metro/src/HmrServer.js
@@ -8,8 +8,6 @@
  * @flow
  */
 
-'use strict';
-
 import type IncrementalBundler, {RevisionId} from './IncrementalBundler';
 import type {GraphOptions} from './shared/types';
 import type {ConfigT, RootPerfLogger} from 'metro-config';
@@ -21,20 +19,20 @@ import type {
 } from 'metro-runtime/src/modules/types';
 import type {UrlWithParsedQuery} from 'url';
 
-const hmrJSBundle = require('./DeltaBundler/Serializers/hmrJSBundle');
-const GraphNotFoundError = require('./IncrementalBundler/GraphNotFoundError');
-const RevisionNotFoundError = require('./IncrementalBundler/RevisionNotFoundError');
-const debounceAsyncQueue = require('./lib/debounceAsyncQueue');
-const formatBundlingError = require('./lib/formatBundlingError');
-const getGraphId = require('./lib/getGraphId');
-const parseOptionsFromUrl = require('./lib/parseOptionsFromUrl');
-const splitBundleOptions = require('./lib/splitBundleOptions');
-const transformHelpers = require('./lib/transformHelpers');
-const {
-  Logger: {createActionStartEntry, createActionEndEntry, log},
-} = require('metro-core');
-const nullthrows = require('nullthrows');
-const url = require('url');
+import hmrJSBundle from './DeltaBundler/Serializers/hmrJSBundle';
+import GraphNotFoundError from './IncrementalBundler/GraphNotFoundError';
+import RevisionNotFoundError from './IncrementalBundler/RevisionNotFoundError';
+import debounceAsyncQueue from './lib/debounceAsyncQueue';
+import formatBundlingError from './lib/formatBundlingError';
+import getGraphId from './lib/getGraphId';
+import parseOptionsFromUrl from './lib/parseOptionsFromUrl';
+import splitBundleOptions from './lib/splitBundleOptions';
+import * as transformHelpers from './lib/transformHelpers';
+import {Logger} from 'metro-core';
+import nullthrows from 'nullthrows';
+import url from 'url';
+
+const {createActionStartEntry, createActionEndEntry, log} = Logger;
 
 export type EntryPointURL = UrlWithParsedQuery;
 
@@ -66,7 +64,7 @@ function send(sendFns: Array<(string) => void>, message: HmrMessage): void {
  * getting connected, disconnected or having errors (through the
  * `onClientConnect`, `onClientDisconnect` and `onClientError` methods).
  */
-class HmrServer<TClient: Client> {
+export default class HmrServer<TClient: Client> {
   _config: ConfigT;
   _bundler: IncrementalBundler;
   _createModuleId: (path: string) => number;
@@ -396,5 +394,3 @@ class HmrServer<TClient: Client> {
     }
   }
 }
-
-module.exports = HmrServer;
diff --git a/packages/metro/src/IncrementalBundler.js b/packages/metro/src/IncrementalBundler.js
index afb23fc838..10521fed2e 100644
--- a/packages/metro/src/IncrementalBundler.js
+++ b/packages/metro/src/IncrementalBundler.js
@@ -9,8 +9,6 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {DeltaResult, Graph, MixedOutput, Module} from './DeltaBundler';
 import type {
   Options as DeltaBundlerOptions,
@@ -21,15 +19,15 @@ import type {GraphId} from './lib/getGraphId';
 import type {ResolverInputOptions} from './shared/types';
 import type {ConfigT} from 'metro-config';
 
-const Bundler = require('./Bundler');
-const DeltaBundler = require('./DeltaBundler');
-const ResourceNotFoundError = require('./IncrementalBundler/ResourceNotFoundError');
-const getGraphId = require('./lib/getGraphId');
-const getPrependedScripts = require('./lib/getPrependedScripts');
-const transformHelpers = require('./lib/transformHelpers');
-const crypto = require('crypto');
-const fs = require('fs');
-const path = require('path');
+import Bundler from './Bundler';
+import DeltaBundler from './DeltaBundler';
+import ResourceNotFoundError from './IncrementalBundler/ResourceNotFoundError';
+import getGraphId from './lib/getGraphId';
+import getPrependedScripts from './lib/getPrependedScripts';
+import * as transformHelpers from './lib/transformHelpers';
+import crypto from 'crypto';
+import fs from 'fs';
+import path from 'path';
 
 export opaque type RevisionId: string = string;
 
@@ -63,7 +61,7 @@ function revisionIdFromString(str: string): RevisionId {
   return str;
 }
 
-class IncrementalBundler {
+export default class IncrementalBundler {
   _config: ConfigT;
   _bundler: Bundler;
   _deltaBundler: DeltaBundler<>;
@@ -366,5 +364,3 @@ class IncrementalBundler {
     await this._bundler.ready();
   }
 }
-
-module.exports = IncrementalBundler;
diff --git a/packages/metro/src/IncrementalBundler/GraphNotFoundError.js b/packages/metro/src/IncrementalBundler/GraphNotFoundError.js
index bb31560232..ac53d83f87 100644
--- a/packages/metro/src/IncrementalBundler/GraphNotFoundError.js
+++ b/packages/metro/src/IncrementalBundler/GraphNotFoundError.js
@@ -9,11 +9,9 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {GraphId} from '../lib/getGraphId';
 
-class GraphNotFoundError extends Error {
+export default class GraphNotFoundError extends Error {
   graphId: GraphId;
 
   constructor(graphId: GraphId) {
@@ -21,5 +19,3 @@ class GraphNotFoundError extends Error {
     this.graphId = graphId;
   }
 }
-
-module.exports = GraphNotFoundError;
diff --git a/packages/metro/src/IncrementalBundler/ResourceNotFoundError.js b/packages/metro/src/IncrementalBundler/ResourceNotFoundError.js
index c55b8c3d9c..19e765488b 100644
--- a/packages/metro/src/IncrementalBundler/ResourceNotFoundError.js
+++ b/packages/metro/src/IncrementalBundler/ResourceNotFoundError.js
@@ -9,9 +9,7 @@
  * @oncall react_native
  */
 
-'use strict';
-
-class ResourceNotFoundError extends Error {
+export default class ResourceNotFoundError extends Error {
   resourcePath: string;
 
   constructor(resourcePath: string) {
@@ -19,5 +17,3 @@ class ResourceNotFoundError extends Error {
     this.resourcePath = resourcePath;
   }
 }
-
-module.exports = ResourceNotFoundError;
diff --git a/packages/metro/src/IncrementalBundler/RevisionNotFoundError.js b/packages/metro/src/IncrementalBundler/RevisionNotFoundError.js
index 04f48ef0b7..0c2e007066 100644
--- a/packages/metro/src/IncrementalBundler/RevisionNotFoundError.js
+++ b/packages/metro/src/IncrementalBundler/RevisionNotFoundError.js
@@ -9,11 +9,9 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {RevisionId} from '../IncrementalBundler';
 
-class RevisionNotFoundError extends Error {
+export default class RevisionNotFoundError extends Error {
   revisionId: RevisionId;
 
   constructor(revisionId: RevisionId) {
@@ -21,5 +19,3 @@ class RevisionNotFoundError extends Error {
     this.revisionId = revisionId;
   }
 }
-
-module.exports = RevisionNotFoundError;
diff --git a/packages/metro/src/ModuleGraph/test-helpers.js b/packages/metro/src/ModuleGraph/test-helpers.js
index f131c2264a..90147960d6 100644
--- a/packages/metro/src/ModuleGraph/test-helpers.js
+++ b/packages/metro/src/ModuleGraph/test-helpers.js
@@ -8,10 +8,8 @@
  * @oncall react_native
  */
 
-'use strict';
-
-const generate = require('@babel/generator').default;
-const {toMatchSnapshot} = require('jest-snapshot');
+import generate from '@babel/generator';
+import {toMatchSnapshot} from 'jest-snapshot';
 
 const generateOptions = {concise: true, sourceType: 'module'};
 const codeFromAst = ast => generate(ast, generateOptions).code;
@@ -80,7 +78,7 @@ function toMatchCodeFrameSnapshot(received) {
   );
 }
 
-module.exports = {
+export {
   codeFromAst,
   comparableCode,
   toEqualComparableCode,
diff --git a/packages/metro/src/ModuleGraph/worker/JsFileWrapping.js b/packages/metro/src/ModuleGraph/worker/JsFileWrapping.js
index 798e6eddad..f54790d49b 100644
--- a/packages/metro/src/ModuleGraph/worker/JsFileWrapping.js
+++ b/packages/metro/src/ModuleGraph/worker/JsFileWrapping.js
@@ -8,8 +8,6 @@
  * @flow strict-local
  */
 
-'use strict';
-
 import type {FunctionExpression, Identifier, Program} from '@babel/types';
 
 import template from '@babel/template';
@@ -162,11 +160,4 @@ function renameRequires(ast: BabelNodeFile): string {
   return newRequireName;
 }
 
-module.exports = {
-  WRAP_NAME,
-
-  wrapJson,
-  jsonToCommonJS,
-  wrapModule,
-  wrapPolyfill,
-};
+export {WRAP_NAME, wrapJson, jsonToCommonJS, wrapModule, wrapPolyfill};
diff --git a/packages/metro/src/ModuleGraph/worker/__tests__/collectDependencies-test.js b/packages/metro/src/ModuleGraph/worker/__tests__/collectDependencies-test.js
index 154a17a04e..17920a6610 100644
--- a/packages/metro/src/ModuleGraph/worker/__tests__/collectDependencies-test.js
+++ b/packages/metro/src/ModuleGraph/worker/__tests__/collectDependencies-test.js
@@ -21,8 +21,9 @@ import type {
 import type {NodePath} from '@babel/traverse';
 import type {MetroBabelFileMetadata} from 'metro-babel-transformer';
 
+import collectDependencies from '../collectDependencies';
+
 const {codeFromAst, comparableCode} = require('../../test-helpers');
-const collectDependencies = require('../collectDependencies');
 const {importLocationsPlugin, locToKey} = require('../importLocationsPlugin');
 const {codeFrameColumns} = require('@babel/code-frame');
 const {transformFromAstSync} = require('@babel/core');
diff --git a/packages/metro/src/ModuleGraph/worker/collectDependencies.js b/packages/metro/src/ModuleGraph/worker/collectDependencies.js
index 948f6d3bbe..697f225f7e 100644
--- a/packages/metro/src/ModuleGraph/worker/collectDependencies.js
+++ b/packages/metro/src/ModuleGraph/worker/collectDependencies.js
@@ -8,8 +8,6 @@
  * @flow
  */
 
-'use strict';
-
 import type {NodePath} from '@babel/traverse';
 import type {CallExpression, Identifier, StringLiteral} from '@babel/types';
 import type {
@@ -17,17 +15,14 @@ import type {
   AsyncDependencyType,
 } from 'metro/private/DeltaBundler/types';
 
-import {isProgram} from '@babel/types';
-
-const generate = require('@babel/generator').default;
-const template = require('@babel/template').default;
-const traverse = require('@babel/traverse').default;
-const types = require('@babel/types');
-const crypto = require('crypto');
-const invariant = require('invariant');
-const nullthrows = require('nullthrows');
-
-const {isImport} = types;
+import generate from '@babel/generator';
+import template from '@babel/template';
+import traverse from '@babel/traverse';
+import * as types from '@babel/types';
+import {isImport, isProgram} from '@babel/types';
+import crypto from 'crypto';
+import invariant from 'invariant';
+import nullthrows from 'nullthrows';
 
 type ImportDependencyOptions = $ReadOnly<{
   asyncType: AsyncDependencyType,
@@ -147,7 +142,7 @@ export type DynamicRequiresBehavior = 'throwAtRuntime' | 'reject';
  *
  * The second argument is only provided for debugging purposes.
  */
-function collectDependencies(
+export default function collectDependencies(
   ast: BabelNodeFile,
   options: Options,
 ): CollectedDependencies {
@@ -932,5 +927,3 @@ class DependencyRegistry {
     return Array.from(this._dependencies.values());
   }
 }
-
-module.exports = collectDependencies;
diff --git a/packages/metro/src/ModuleGraph/worker/generateImportNames.js b/packages/metro/src/ModuleGraph/worker/generateImportNames.js
index b539084460..8c035a77d2 100644
--- a/packages/metro/src/ModuleGraph/worker/generateImportNames.js
+++ b/packages/metro/src/ModuleGraph/worker/generateImportNames.js
@@ -8,16 +8,14 @@
  * @flow strict-local
  */
 
-'use strict';
-
-const traverse = require('@babel/traverse').default;
-const nullthrows = require('nullthrows');
+import traverse from '@babel/traverse';
+import nullthrows from 'nullthrows';
 
 /**
  * Select unused names for "metroImportDefault" and "metroImportAll", by
  * calling "generateUid".
  */
-function generateImportNames(ast: BabelNode): {
+export default function generateImportNames(ast: BabelNode): {
   importAll: string,
   importDefault: string,
 } {
@@ -38,5 +36,3 @@ function generateImportNames(ast: BabelNode): {
     importDefault: nullthrows(importDefault),
   };
 }
-
-module.exports = generateImportNames;
diff --git a/packages/metro/src/ModuleGraph/worker/importLocationsPlugin.js b/packages/metro/src/ModuleGraph/worker/importLocationsPlugin.js
index 5730239e00..e4707e0ac5 100644
--- a/packages/metro/src/ModuleGraph/worker/importLocationsPlugin.js
+++ b/packages/metro/src/ModuleGraph/worker/importLocationsPlugin.js
@@ -9,8 +9,6 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {File, PluginObj} from '@babel/core';
 import typeof * as Types from '@babel/types';
 import type {MetroBabelFileMetadata} from 'metro-babel-transformer';
@@ -85,4 +83,4 @@ function locToKey(loc: BabelSourceLocation): string {
   return `${start.line},${start.column}:${end.line},${end.column}`;
 }
 
-module.exports = {importLocationsPlugin, locToKey};
+export {importLocationsPlugin, locToKey};
diff --git a/packages/metro/src/Server.js b/packages/metro/src/Server.js
index 1b0ad1b4e0..ad81b57a3e 100644
--- a/packages/metro/src/Server.js
+++ b/packages/metro/src/Server.js
@@ -9,8 +9,6 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {AssetData} from './Assets';
 import type {ExplodedSourceMap} from './DeltaBundler/Serializers/getExplodedSourceMap';
 import type {RamBundleInfo} from './DeltaBundler/Serializers/getRamBundleInfo';
@@ -44,49 +42,43 @@ import type {
 import type {CustomResolverOptions} from 'metro-resolver/private/types';
 import type {CustomTransformOptions} from 'metro-transform-worker';
 
+import {getAsset} from './Assets';
+import baseJSBundle from './DeltaBundler/Serializers/baseJSBundle';
+import getAllFiles from './DeltaBundler/Serializers/getAllFiles';
+import getAssets from './DeltaBundler/Serializers/getAssets';
+import {getExplodedSourceMap} from './DeltaBundler/Serializers/getExplodedSourceMap';
+import getRamBundleInfo from './DeltaBundler/Serializers/getRamBundleInfo';
+import {sourceMapStringNonBlocking} from './DeltaBundler/Serializers/sourceMapString';
+import IncrementalBundler from './IncrementalBundler';
+import ResourceNotFoundError from './IncrementalBundler/ResourceNotFoundError';
+import bundleToString from './lib/bundleToString';
+import formatBundlingError from './lib/formatBundlingError';
+import getGraphId from './lib/getGraphId';
+import parseJsonBody from './lib/parseJsonBody';
+import parseOptionsFromUrl from './lib/parseOptionsFromUrl';
+import splitBundleOptions from './lib/splitBundleOptions';
+import * as transformHelpers from './lib/transformHelpers';
+import {UnableToResolveError} from './node-haste/DependencyGraph/ModuleResolution';
+import parsePlatformFilePath from './node-haste/lib/parsePlatformFilePath';
+import MultipartResponse from './Server/MultipartResponse';
+import symbolicate from './Server/symbolicate';
 import {SourcePathsMode} from './shared/types';
-
-const {getAsset} = require('./Assets');
-const baseJSBundle = require('./DeltaBundler/Serializers/baseJSBundle');
-const getAllFiles = require('./DeltaBundler/Serializers/getAllFiles');
-const getAssets = require('./DeltaBundler/Serializers/getAssets');
-const {
-  getExplodedSourceMap,
-} = require('./DeltaBundler/Serializers/getExplodedSourceMap');
-const getRamBundleInfo = require('./DeltaBundler/Serializers/getRamBundleInfo');
-const {
-  sourceMapStringNonBlocking,
-} = require('./DeltaBundler/Serializers/sourceMapString');
-const IncrementalBundler = require('./IncrementalBundler');
-const ResourceNotFoundError = require('./IncrementalBundler/ResourceNotFoundError');
-const bundleToString = require('./lib/bundleToString');
-const formatBundlingError = require('./lib/formatBundlingError');
-const getGraphId = require('./lib/getGraphId');
-const parseJsonBody = require('./lib/parseJsonBody');
-const parseOptionsFromUrl = require('./lib/parseOptionsFromUrl');
-const splitBundleOptions = require('./lib/splitBundleOptions');
-const transformHelpers = require('./lib/transformHelpers');
-const {
-  UnableToResolveError,
-} = require('./node-haste/DependencyGraph/ModuleResolution');
-const parsePlatformFilePath = require('./node-haste/lib/parsePlatformFilePath');
-const MultipartResponse = require('./Server/MultipartResponse');
-const symbolicate = require('./Server/symbolicate');
-const {codeFrameColumns} = require('@babel/code-frame');
+import {codeFrameColumns} from '@babel/code-frame';
+import * as fs from 'graceful-fs';
+import invariant from 'invariant';
+import * as jscSafeUrl from 'jsc-safe-url';
+import {Logger} from 'metro-core';
+import mime from 'mime-types';
+import nullthrows from 'nullthrows';
+import path from 'path';
+import {performance} from 'perf_hooks';
+import querystring from 'querystring';
+import url from 'url';
+
+// eslint-disable-next-line import/no-commonjs
 const debug = require('debug')('Metro:Server');
-const fs = require('graceful-fs');
-const invariant = require('invariant');
-const jscSafeUrl = require('jsc-safe-url');
-const {
-  Logger,
-  Logger: {createActionStartEntry, createActionEndEntry, log},
-} = require('metro-core');
-const mime = require('mime-types');
-const nullthrows = require('nullthrows');
-const path = require('path');
-const {performance} = require('perf_hooks');
-const querystring = require('querystring');
-const url = require('url');
+
+const {createActionStartEntry, createActionEndEntry, log} = Logger;
 
 const noopLogger: RootPerfLogger = {
   start: () => {},
@@ -139,7 +131,7 @@ export type ServerOptions = $ReadOnly<{
 const DELTA_ID_HEADER = 'X-Metro-Delta-ID';
 const FILES_CHANGED_COUNT_HEADER = 'X-Metro-Files-Changed-Count';
 
-class Server {
+export default class Server {
   _bundler: IncrementalBundler;
   _config: ConfigT;
   _createModuleId: (path: string) => number;
@@ -1626,5 +1618,3 @@ function* zip<X, Y>(xs: Iterable<X>, ys: Iterable<Y>): Iterable<[X, Y]> {
 function getBuildID(buildNumber: number): string {
   return buildNumber.toString(36);
 }
-
-module.exports = Server;
diff --git a/packages/metro/src/Server/MultipartResponse.js b/packages/metro/src/Server/MultipartResponse.js
index 0fe85b581e..42148efa4e 100644
--- a/packages/metro/src/Server/MultipartResponse.js
+++ b/packages/metro/src/Server/MultipartResponse.js
@@ -9,17 +9,16 @@
  * @oncall react_native
  */
 
-'use strict';
 import type {IncomingMessage, ServerResponse} from 'http';
 
-const accepts = require('accepts');
+import accepts from 'accepts';
 
 const CRLF = '\r\n';
 const BOUNDARY = '3beqjf3apnqeu3h5jqorms4i';
 type Data = string | Buffer | Uint8Array;
 type Headers = {[string]: string | number};
 
-class MultipartResponse {
+export default class MultipartResponse {
   static wrapIfSupported(
     req: IncomingMessage,
     res: ServerResponse,
@@ -100,5 +99,3 @@ class MultipartResponse {
     return this;
   }
 }
-
-module.exports = MultipartResponse;
diff --git a/packages/metro/src/Server/__tests__/Server-test.js b/packages/metro/src/Server/__tests__/Server-test.js
index beb036ba23..0736f9d469 100644
--- a/packages/metro/src/Server/__tests__/Server-test.js
+++ b/packages/metro/src/Server/__tests__/Server-test.js
@@ -18,6 +18,7 @@ import type {
   TransformResultDependency,
 } from '../../DeltaBundler/types';
 
+import ResourceNotFoundError from '../../IncrementalBundler/ResourceNotFoundError';
 import CountingSet from '../../lib/CountingSet';
 import {mergeConfig} from 'metro-config';
 // $FlowFixMe[untyped-import]
@@ -25,7 +26,6 @@ import MockRequest from 'mock-req';
 // $FlowFixMe[untyped-import]
 import MockResponse from 'mock-res';
 
-const ResourceNotFoundError = require('../../IncrementalBundler/ResourceNotFoundError');
 const {
   getDefaultConfig: {getDefaultValues},
 } = require('metro-config');
@@ -96,7 +96,7 @@ describe('processRequest', () => {
       getResolveDependencyFn,
     }));
 
-    Bundler = require('../../Bundler');
+    Bundler = require('../../Bundler').default;
     jest
       .spyOn(Bundler.prototype, 'getDependencyGraph')
       .mockImplementation(getDependencyGraph);
@@ -104,13 +104,13 @@ describe('processRequest', () => {
     jest.mock('fs', () => new (require('metro-memory-fs'))());
     fs = require('fs');
 
-    DeltaBundler = require('../../DeltaBundler');
+    DeltaBundler = require('../../DeltaBundler').default;
     jest
       .spyOn(DeltaBundler.prototype, 'buildGraph')
       .mockImplementation(buildGraph);
     jest.spyOn(DeltaBundler.prototype, 'getDelta').mockImplementation(getDelta);
 
-    Server = require('../../Server');
+    Server = require('../../Server').default;
   });
 
   afterEach(() => {
@@ -487,7 +487,7 @@ describe('processRequest', () => {
   });
 
   test('should handle DELETE requests on *.bundle', async () => {
-    const IncrementalBundler = require('../../IncrementalBundler');
+    const IncrementalBundler = require('../../IncrementalBundler').default;
     const updateSpy = jest.spyOn(IncrementalBundler.prototype, 'updateGraph');
     const initSpy = jest.spyOn(IncrementalBundler.prototype, 'initializeGraph');
 
@@ -545,7 +545,7 @@ describe('processRequest', () => {
   });
 
   test('DELETE handles errors', async () => {
-    const IncrementalBundler = require('../../IncrementalBundler');
+    const IncrementalBundler = require('../../IncrementalBundler').default;
     jest
       .spyOn(IncrementalBundler.prototype, 'endGraph')
       .mockImplementationOnce(async () => {
@@ -1122,7 +1122,7 @@ describe('processRequest', () => {
           }),
         };
 
-        const IncrementalBundler = require('../../IncrementalBundler');
+        const IncrementalBundler = require('../../IncrementalBundler').default;
         const updateSpy = jest.spyOn(
           IncrementalBundler.prototype,
           'updateGraph',
diff --git a/packages/metro/src/Server/symbolicate.js b/packages/metro/src/Server/symbolicate.js
index 0cb55ec942..01dadb119c 100644
--- a/packages/metro/src/Server/symbolicate.js
+++ b/packages/metro/src/Server/symbolicate.js
@@ -9,7 +9,6 @@
  * @oncall react_native
  */
 
-'use strict';
 import type {
   FBSourceFunctionMap,
   MetroSourceMapSegmentTuple,
@@ -17,12 +16,8 @@ import type {
 import type {ExplodedSourceMap} from '../DeltaBundler/Serializers/getExplodedSourceMap';
 import type {ConfigT} from 'metro-config';
 
-const {
-  greatestLowerBound,
-} = require('metro-source-map/private/Consumer/search');
-const {
-  SourceMetadataMapConsumer,
-} = require('metro-symbolicate/private/Symbolication');
+import {greatestLowerBound} from 'metro-source-map/private/Consumer/search';
+import {SourceMetadataMapConsumer} from 'metro-symbolicate/private/Symbolication';
 
 export type StackFrameInput = {
   +file: ?string,
@@ -64,7 +59,7 @@ function createFunctionNameGetter(
     });
 }
 
-async function symbolicate(
+export default async function symbolicate(
   stack: $ReadOnlyArray<StackFrameInput>,
   maps: Iterable<[string, ExplodedSourceMap]>,
   config: ConfigT,
@@ -224,5 +219,3 @@ async function symbolicate(
     customizeStack,
   );
 }
-
-module.exports = symbolicate;
diff --git a/packages/metro/src/__tests__/HmrServer-test.js b/packages/metro/src/__tests__/HmrServer-test.js
index 8a0be0abc4..f9d9f6a516 100644
--- a/packages/metro/src/__tests__/HmrServer-test.js
+++ b/packages/metro/src/__tests__/HmrServer-test.js
@@ -14,12 +14,12 @@ import type {Client} from '../HmrServer';
 import type {HmrClientMessage} from 'metro-runtime/src/modules/types';
 
 import DeltaBundler from '../DeltaBundler';
+import HmrServer from '../HmrServer';
 import IncrementalBundler from '../IncrementalBundler';
+import getGraphId from '../lib/getGraphId';
 import EventEmitter from 'events';
 import {mergeConfig} from 'metro-config';
 
-const HmrServer = require('../HmrServer');
-const getGraphId = require('../lib/getGraphId');
 const {
   getDefaultConfig: {getDefaultValues},
 } = require('metro-config');
diff --git a/packages/metro/src/cli-utils.js b/packages/metro/src/cli-utils.js
index 146e203cf8..e80acf0118 100644
--- a/packages/metro/src/cli-utils.js
+++ b/packages/metro/src/cli-utils.js
@@ -9,11 +9,9 @@
  * @oncall react_native
  */
 
-'use strict';
+import fs from 'fs';
 
-const fs = require('fs');
-
-exports.watchFile = async function (
+export const watchFile = async function (
   filename: string,
   callback: () => any,
 ): Promise<void> {
@@ -24,7 +22,7 @@ exports.watchFile = async function (
   await callback();
 };
 
-exports.makeAsyncCommand =
+export const makeAsyncCommand =
   <T>(command: (argv: T) => Promise<void>): ((argv: T) => void) =>
   (argv: T) => {
     Promise.resolve(command(argv)).catch(error => {
diff --git a/packages/metro/src/cli.js b/packages/metro/src/cli.js
index 04a57659f2..8e451cae50 100755
--- a/packages/metro/src/cli.js
+++ b/packages/metro/src/cli.js
@@ -10,6 +10,8 @@
  * @oncall react_native
  */
 
+/* eslint-disable import/no-commonjs */
+
 'use strict';
 
 try {
diff --git a/packages/metro/src/commands/build.js b/packages/metro/src/commands/build.js
index da63296f30..3826da68f0 100644
--- a/packages/metro/src/commands/build.js
+++ b/packages/metro/src/commands/build.js
@@ -15,12 +15,11 @@ import type {CustomResolverOptions} from 'metro-resolver';
 import type {ModuleObject} from 'yargs';
 import typeof Yargs from 'yargs';
 
+import {makeAsyncCommand} from '../cli-utils';
 import parseKeyValueParamArray from '../cli/parseKeyValueParamArray';
-
-const {makeAsyncCommand} = require('../cli-utils');
-const TerminalReporter = require('../lib/TerminalReporter');
-const {loadConfig} = require('metro-config');
-const {Terminal} = require('metro-core');
+import TerminalReporter from '../lib/TerminalReporter';
+import {loadConfig} from 'metro-config';
+import {Terminal} from 'metro-core';
 
 const term = new Terminal(process.stdout);
 const updateReporter = new TerminalReporter(term);
@@ -43,7 +42,7 @@ type Args = $ReadOnly<{
   resolverOption: CustomResolverOptions,
 }>;
 
-module.exports = (): {
+export default (): {
   ...ModuleObject,
   handler: Function,
 } => ({
@@ -109,6 +108,7 @@ module.exports = (): {
     };
 
     // Inline require() to avoid circular dependency with ../index
+    // eslint-disable-next-line import/no-commonjs
     const MetroApi = require('../index');
 
     await MetroApi.runBuild(config, {
diff --git a/packages/metro/src/commands/dependencies.js b/packages/metro/src/commands/dependencies.js
index 05cf39b7ee..0c2615216d 100644
--- a/packages/metro/src/commands/dependencies.js
+++ b/packages/metro/src/commands/dependencies.js
@@ -9,18 +9,16 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {ConfigT} from 'metro-config';
 import type {ModuleObject} from 'yargs';
 import typeof Yargs from 'yargs';
 
-const {makeAsyncCommand} = require('../cli-utils');
-const Server = require('../Server');
-const fs = require('fs');
-const {loadConfig} = require('metro-config');
-const path = require('path');
-const {promisify} = require('util');
+import {makeAsyncCommand} from '../cli-utils';
+import Server from '../Server';
+import fs from 'fs';
+import {loadConfig} from 'metro-config';
+import path from 'path';
+import {promisify} from 'util';
 
 type Args = $ReadOnly<{
   entryFile: string,
@@ -84,7 +82,7 @@ async function dependencies(args: Args, config: ConfigT) {
     : Promise.resolve();
 }
 
-module.exports = (): {...ModuleObject, handler: Function} => ({
+export default (): {...ModuleObject, handler: Function} => ({
   command: 'get-dependencies [entryFile]',
   desc: 'List all dependencies that will be bundled for a given entry point',
   builder: (yargs: Yargs) => {
diff --git a/packages/metro/src/commands/serve.js b/packages/metro/src/commands/serve.js
index d802ec5394..c90ea9ad8a 100644
--- a/packages/metro/src/commands/serve.js
+++ b/packages/metro/src/commands/serve.js
@@ -9,14 +9,12 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {ModuleObject} from 'yargs';
 import typeof Yargs from 'yargs';
 
-const {makeAsyncCommand, watchFile} = require('../cli-utils');
-const {loadConfig, resolveConfig} = require('metro-config');
-const {promisify} = require('util');
+import {makeAsyncCommand, watchFile} from '../cli-utils';
+import {loadConfig, resolveConfig} from 'metro-config';
+import {promisify} from 'util';
 
 type Args = $ReadOnly<{
   projectRoots?: $ReadOnlyArray<string>,
@@ -32,7 +30,7 @@ type Args = $ReadOnly<{
   resetCache?: boolean,
 }>;
 
-module.exports = (): {
+export default (): {
   ...ModuleObject,
   handler: Function,
 } => ({
@@ -96,6 +94,7 @@ module.exports = (): {
       const config = await loadConfig(argv);
 
       // Inline require() to avoid circular dependency with ../index
+      // eslint-disable-next-line import/no-commonjs
       const MetroApi = require('../index');
 
       const {
diff --git a/packages/metro/src/index.flow.js b/packages/metro/src/index.flow.js
index 027e964db2..f333ad2a08 100644
--- a/packages/metro/src/index.flow.js
+++ b/packages/metro/src/index.flow.js
@@ -9,8 +9,6 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {AssetData} from './Assets';
 import type {ReadOnlyGraph} from './DeltaBundler';
 import type {ServerOptions} from './Server';
@@ -29,30 +27,30 @@ import type {CustomResolverOptions} from 'metro-resolver';
 import type {CustomTransformOptions} from 'metro-transform-worker';
 import typeof Yargs from 'yargs';
 
-const makeBuildCommand = require('./commands/build');
-const makeDependenciesCommand = require('./commands/dependencies');
-const makeServeCommand = require('./commands/serve');
-const MetroHmrServer = require('./HmrServer');
-const IncrementalBundler = require('./IncrementalBundler');
-const createWebsocketServer = require('./lib/createWebsocketServer');
-const JsonReporter = require('./lib/JsonReporter');
-const TerminalReporter = require('./lib/TerminalReporter');
-const MetroServer = require('./Server');
-const outputBundle = require('./shared/output/bundle');
-const chalk = require('chalk');
-const fs = require('fs');
-const http = require('http');
-const https = require('https');
-const {
+import makeBuildCommand from './commands/build';
+import makeDependenciesCommand from './commands/dependencies';
+import makeServeCommand from './commands/serve';
+import MetroHmrServer from './HmrServer';
+import IncrementalBundler from './IncrementalBundler';
+import createWebsocketServer from './lib/createWebsocketServer';
+import JsonReporter from './lib/JsonReporter';
+import TerminalReporter from './lib/TerminalReporter';
+import MetroServer from './Server';
+import * as outputBundle from './shared/output/bundle';
+import chalk from 'chalk';
+import fs from 'fs';
+import http from 'http';
+import https from 'https';
+import {
   getDefaultConfig,
   loadConfig,
   mergeConfig,
   resolveConfig,
-} = require('metro-config');
-const {Terminal} = require('metro-core');
-const net = require('net');
-const nullthrows = require('nullthrows');
-const {parse} = require('url');
+} from 'metro-config';
+import {Terminal} from 'metro-core';
+import net from 'net';
+import nullthrows from 'nullthrows';
+import {parse} from 'url';
 
 type MetroMiddleWare = {
   attachHmrServer: (httpServer: HttpServer | HttpsServer) => void,
@@ -149,9 +147,7 @@ export type RunBuildResult = {
 type BuildCommandOptions = {} | null;
 type ServeCommandOptions = {} | null;
 
-exports.Terminal = Terminal;
-exports.JsonReporter = JsonReporter;
-exports.TerminalReporter = TerminalReporter;
+export {Terminal, JsonReporter, TerminalReporter};
 
 export type {AssetData} from './Assets';
 export type {Reporter, ReportableEvent} from './lib/reporting';
@@ -163,7 +159,7 @@ async function getConfig(config: InputConfigT): Promise<ConfigT> {
   return mergeConfig(defaultConfig, config);
 }
 
-async function runMetro(
+export async function runMetro(
   config: InputConfigT,
   options?: RunMetroOptions,
 ): Promise<MetroServer> {
@@ -206,12 +202,9 @@ async function runMetro(
   return server;
 }
 
-exports.runMetro = runMetro;
-exports.loadConfig = loadConfig;
-exports.mergeConfig = mergeConfig;
-exports.resolveConfig = resolveConfig;
+export {loadConfig, mergeConfig, resolveConfig};
 
-const createConnectMiddleware = async function (
+export const createConnectMiddleware = async function (
   config: ConfigT,
   options?: RunMetroOptions,
 ): Promise<MetroMiddleWare> {
@@ -254,9 +247,8 @@ const createConnectMiddleware = async function (
     },
   };
 };
-exports.createConnectMiddleware = createConnectMiddleware;
 
-exports.runServer = async (
+export const runServer = async (
   config: ConfigT,
   {
     hasReducedPerformance = false,
@@ -286,6 +278,7 @@ exports.runServer = async (
     );
   }
   // Lazy require
+  // eslint-disable-next-line import/no-commonjs
   const connect = require('connect');
 
   const serverApp = connect();
@@ -386,7 +379,7 @@ exports.runServer = async (
   });
 };
 
-exports.runBuild = async (
+export const runBuild = async (
   config: ConfigT,
   {
     assets = false,
@@ -477,7 +470,7 @@ exports.runBuild = async (
   }
 };
 
-exports.buildGraph = async function (
+export const buildGraph = async function (
   config: InputConfigT,
   {
     customTransformOptions = Object.create(null),
@@ -520,7 +513,7 @@ type AttachMetroCLIOptions = {
   ...
 };
 
-exports.attachMetroCli = function (
+export const attachMetroCli = function (
   yargs: Yargs,
   options?: AttachMetroCLIOptions = {},
 ): Yargs {
diff --git a/packages/metro/src/index.js b/packages/metro/src/index.js
index 47a8753481..ad754a8d16 100644
--- a/packages/metro/src/index.js
+++ b/packages/metro/src/index.js
@@ -9,6 +9,8 @@
  * @oncall react_native
  */
 
+/* eslint-disable import/no-commonjs */
+
 'use strict';
 
 /*::
diff --git a/packages/metro/src/integration_tests/__tests__/rambundle-test.js b/packages/metro/src/integration_tests/__tests__/rambundle-test.js
index 476083480c..6d15b98674 100644
--- a/packages/metro/src/integration_tests/__tests__/rambundle-test.js
+++ b/packages/metro/src/integration_tests/__tests__/rambundle-test.js
@@ -8,11 +8,10 @@
  * @oncall react_native
  */
 
-'use strict';
+import * as Metro from '../../..';
+import RamBundleParser from '../../lib/RamBundleParser';
+import * as ramBundleOutput from '../../shared/output/unbundle';
 
-const Metro = require('../../..');
-const RamBundleParser = require('../../lib/RamBundleParser');
-const ramBundleOutput = require('../../shared/output/unbundle');
 const fs = require('fs');
 const os = require('os');
 const path = require('path');
diff --git a/packages/metro/src/integration_tests/execBundle.js b/packages/metro/src/integration_tests/execBundle.js
index f040dad425..83926a476e 100644
--- a/packages/metro/src/integration_tests/execBundle.js
+++ b/packages/metro/src/integration_tests/execBundle.js
@@ -9,9 +9,7 @@
  * @oncall react_native
  */
 
-'use strict';
-
-const vm = require('vm');
+import vm from 'vm';
 
 module.exports = function execBundle(code: string, context: any = {}): mixed {
   if (vm.isContext(context)) {
diff --git a/packages/metro/src/lib/BatchProcessor.js b/packages/metro/src/lib/BatchProcessor.js
index 05372c6b70..f01b1fe6fc 100644
--- a/packages/metro/src/lib/BatchProcessor.js
+++ b/packages/metro/src/lib/BatchProcessor.js
@@ -9,9 +9,7 @@
  * @oncall react_native
  */
 
-'use strict';
-
-const invariant = require('invariant');
+import invariant from 'invariant';
 
 type ProcessBatch<TItem, TResult> = (
   batch: Array<TItem>,
@@ -38,7 +36,7 @@ type QueueItem<TItem, TResult> = {
  * if we have many items pending in a short amount of time, we can start
  * processing right away.
  */
-class BatchProcessor<TItem, TResult> {
+export default class BatchProcessor<TItem, TResult> {
   _currentProcessCount: number;
   _options: BatchProcessorOptions;
   _processBatch: ProcessBatch<TItem, TResult>;
@@ -124,5 +122,3 @@ class BatchProcessor<TItem, TResult> {
     return this._queue.length;
   }
 }
-
-module.exports = BatchProcessor;
diff --git a/packages/metro/src/lib/JsonReporter.js b/packages/metro/src/lib/JsonReporter.js
index 5a4fe118eb..59f75f17ad 100644
--- a/packages/metro/src/lib/JsonReporter.js
+++ b/packages/metro/src/lib/JsonReporter.js
@@ -9,8 +9,6 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {Writable} from 'stream';
 
 export type SerializedError = {
@@ -32,7 +30,7 @@ export type SerializedEvent<TEvent: {[string]: any, ...}> = TEvent extends {
     }
   : TEvent;
 
-class JsonReporter<TEvent: {[string]: any, ...}> {
+export default class JsonReporter<TEvent: {[string]: any, ...}> {
   _stream: Writable;
 
   constructor(stream: Writable) {
@@ -82,5 +80,3 @@ function serializeError(
   }
   return serialized;
 }
-
-module.exports = JsonReporter;
diff --git a/packages/metro/src/lib/RamBundleParser.js b/packages/metro/src/lib/RamBundleParser.js
index d83e9c13dc..0af6db2eb3 100644
--- a/packages/metro/src/lib/RamBundleParser.js
+++ b/packages/metro/src/lib/RamBundleParser.js
@@ -8,9 +8,7 @@
  * @flow strict
  */
 
-'use strict';
-
-const MAGIC_NUMBER = require('../shared/output/RamBundle/magic-number');
+import MAGIC_NUMBER from '../shared/output/RamBundle/magic-number';
 
 const SIZEOF_UINT32 = 4;
 const HEADER_SIZE = 3;
@@ -24,7 +22,7 @@ const HEADER_SIZE = 3;
  * getStartupCode(): returns the runtime and the startup code of the bundle.
  * getModule(): returns the code for the specified module.
  */
-class RamBundleParser {
+export default class RamBundleParser {
   _buffer: Buffer;
   _numModules: number;
   _startupCodeLength: number;
@@ -66,5 +64,3 @@ class RamBundleParser {
     return this._buffer.toString('utf8', start, end);
   }
 }
-
-module.exports = RamBundleParser;
diff --git a/packages/metro/src/lib/TerminalReporter.js b/packages/metro/src/lib/TerminalReporter.js
index fe0a24107c..09c325b385 100644
--- a/packages/metro/src/lib/TerminalReporter.js
+++ b/packages/metro/src/lib/TerminalReporter.js
@@ -9,18 +9,16 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {BundleDetails, ReportableEvent} from './reporting';
 import type {Terminal} from 'metro-core';
 import type {HealthCheckResult, WatcherStatus} from 'metro-file-map';
 
-const logToConsole = require('./logToConsole');
-const reporting = require('./reporting');
-const chalk = require('chalk');
-const throttle = require('lodash.throttle');
-const {AmbiguousModuleResolutionError} = require('metro-core');
-const path = require('path');
+import logToConsole from './logToConsole';
+import * as reporting from './reporting';
+import chalk from 'chalk';
+import throttle from 'lodash.throttle';
+import {AmbiguousModuleResolutionError} from 'metro-core';
+import path from 'path';
 
 type BundleProgress = {
   bundleDetails: BundleDetails,
@@ -72,7 +70,7 @@ const MAX_PROGRESS_BAR_CHAR_WIDTH = 16;
  * We try to print useful information to the terminal for interactive builds.
  * This implements the `Reporter` interface from the './reporting' module.
  */
-class TerminalReporter {
+export default class TerminalReporter {
   /**
    * The bundle builds for which we are actively maintaining the status on the
    * terminal, ie. showing a progress bar. There can be several bundles being
@@ -274,6 +272,7 @@ class TerminalReporter {
         break;
       case 'dep_graph_loading':
         const color = event.hasReducedPerformance ? chalk.red : chalk.blue;
+        // eslint-disable-next-line import/no-commonjs
         const version = 'v' + require('../../package.json').version;
         this.terminal.log(
           color.bold(
@@ -543,5 +542,3 @@ class TerminalReporter {
     this.terminal.status(this._getStatusMessage());
   }
 }
-
-module.exports = TerminalReporter;
diff --git a/packages/metro/src/lib/__mocks__/GlobalTransformCache.js b/packages/metro/src/lib/__mocks__/GlobalTransformCache.js
index 9ccde94e57..71d13c9bc4 100644
--- a/packages/metro/src/lib/__mocks__/GlobalTransformCache.js
+++ b/packages/metro/src/lib/__mocks__/GlobalTransformCache.js
@@ -15,4 +15,4 @@ function get(): null {
   return null;
 }
 
-module.exports = {get};
+export {get};
diff --git a/packages/metro/src/lib/__mocks__/declareOpts.js b/packages/metro/src/lib/__mocks__/declareOpts.js
index fe512a5d4e..6ea41aa844 100644
--- a/packages/metro/src/lib/__mocks__/declareOpts.js
+++ b/packages/metro/src/lib/__mocks__/declareOpts.js
@@ -10,7 +10,7 @@
 
 'use strict';
 
-module.exports = function (declared: Object): (opts: any) => any {
+export default function (declared: Object): (opts: any) => any {
   return function (opts: Object) {
     for (var p in declared) {
       if (opts[p] == null && declared[p].default != null) {
@@ -19,4 +19,4 @@ module.exports = function (declared: Object): (opts: any) => any {
     }
     return opts;
   };
-};
+}
diff --git a/packages/metro/src/lib/__mocks__/getAbsolutePath.js b/packages/metro/src/lib/__mocks__/getAbsolutePath.js
index cfa83521fb..d034626ab1 100644
--- a/packages/metro/src/lib/__mocks__/getAbsolutePath.js
+++ b/packages/metro/src/lib/__mocks__/getAbsolutePath.js
@@ -13,5 +13,5 @@
 
 const path = require('path');
 
-module.exports = (file: string, roots: $ReadOnlyArray<string>): string =>
+export default (file: string, roots: $ReadOnlyArray<string>): string =>
   path.resolve(roots[0], file);
diff --git a/packages/metro/src/lib/__tests__/BatchProcessor-test.js b/packages/metro/src/lib/__tests__/BatchProcessor-test.js
index d56a7b405f..5fd1e3a49d 100644
--- a/packages/metro/src/lib/__tests__/BatchProcessor-test.js
+++ b/packages/metro/src/lib/__tests__/BatchProcessor-test.js
@@ -13,7 +13,7 @@
 
 jest.useRealTimers();
 
-const BatchProcessor = require('../BatchProcessor');
+import BatchProcessor from '../BatchProcessor';
 
 describe('BatchProcessor', () => {
   const options = {
diff --git a/packages/metro/src/lib/__tests__/bundleToString-test.js b/packages/metro/src/lib/__tests__/bundleToString-test.js
index 2bf33a3c6e..ccd4101d61 100644
--- a/packages/metro/src/lib/__tests__/bundleToString-test.js
+++ b/packages/metro/src/lib/__tests__/bundleToString-test.js
@@ -8,9 +8,7 @@
  * @oncall react_native
  */
 
-'use strict';
-
-const bundleToString = require('../bundleToString');
+import bundleToString from '../bundleToString';
 
 describe('bundleToString', () => {
   test('serializes a bundle into a plain JS bundle', () => {
diff --git a/packages/metro/src/lib/__tests__/debounceAsyncQueue-test.js b/packages/metro/src/lib/__tests__/debounceAsyncQueue-test.js
index 5322d4f3ea..6a286be460 100644
--- a/packages/metro/src/lib/__tests__/debounceAsyncQueue-test.js
+++ b/packages/metro/src/lib/__tests__/debounceAsyncQueue-test.js
@@ -9,9 +9,7 @@
  * @oncall react_native
  */
 
-'use strict';
-
-const debounceAsyncQueue = require('../debounceAsyncQueue');
+import debounceAsyncQueue from '../debounceAsyncQueue';
 
 describe('debounceAsyncQueue', () => {
   test('debounces calls', async () => {
diff --git a/packages/metro/src/lib/__tests__/getGraphId-test.js b/packages/metro/src/lib/__tests__/getGraphId-test.js
index 7ef151176e..ac0a8a21cd 100644
--- a/packages/metro/src/lib/__tests__/getGraphId-test.js
+++ b/packages/metro/src/lib/__tests__/getGraphId-test.js
@@ -9,9 +9,7 @@
  * @oncall react_native
  */
 
-'use strict';
-
-const getGraphId = require('../getGraphId');
+import getGraphId from '../getGraphId';
 
 describe('getGraphId', () => {
   test('generates a unique id from entry file', () => {
diff --git a/packages/metro/src/lib/__tests__/getMaxWorkers-test.js b/packages/metro/src/lib/__tests__/getMaxWorkers-test.js
index 6c46d95edb..e4fca50c7a 100644
--- a/packages/metro/src/lib/__tests__/getMaxWorkers-test.js
+++ b/packages/metro/src/lib/__tests__/getMaxWorkers-test.js
@@ -13,7 +13,8 @@
 
 jest.mock('os');
 
-const getMaxWorkers = require('../getMaxWorkers');
+import getMaxWorkers from '../getMaxWorkers';
+
 const os = require('os');
 
 test('calculates the number of max workers', () => {
diff --git a/packages/metro/src/lib/__tests__/getPreludeCode-test.js b/packages/metro/src/lib/__tests__/getPreludeCode-test.js
index f6551d8fb9..b3f8c09bc7 100644
--- a/packages/metro/src/lib/__tests__/getPreludeCode-test.js
+++ b/packages/metro/src/lib/__tests__/getPreludeCode-test.js
@@ -9,9 +9,8 @@
  * @oncall react_native
  */
 
-'use strict';
+import getPreludeCode from '../getPreludeCode';
 
-const getPreludeCode = require('../getPreludeCode');
 const vm = require('vm');
 
 ['development', 'production'].forEach((mode: string) => {
diff --git a/packages/metro/src/lib/__tests__/logToConsole-test.js b/packages/metro/src/lib/__tests__/logToConsole-test.js
index f59929a60f..c410c52627 100644
--- a/packages/metro/src/lib/__tests__/logToConsole-test.js
+++ b/packages/metro/src/lib/__tests__/logToConsole-test.js
@@ -27,7 +27,7 @@ let log;
 
 beforeEach(() => {
   jest.resetModules();
-  log = require('../logToConsole');
+  log = require('../logToConsole').default;
 
   console.log = jest.fn();
 });
diff --git a/packages/metro/src/lib/__tests__/parseCustomResolverOptions-test.js b/packages/metro/src/lib/__tests__/parseCustomResolverOptions-test.js
index b0b65ae827..de970a7e9b 100644
--- a/packages/metro/src/lib/__tests__/parseCustomResolverOptions-test.js
+++ b/packages/metro/src/lib/__tests__/parseCustomResolverOptions-test.js
@@ -9,9 +9,8 @@
  * @oncall react_native
  */
 
-'use strict';
+import parseCustomResolverOptions from '../parseCustomResolverOptions';
 
-const parseCustomResolverOptions = require('../parseCustomResolverOptions');
 const url = require('url');
 
 test('should parse some custom options from a http url', () => {
diff --git a/packages/metro/src/lib/__tests__/parseCustomTransformOptions-test.js b/packages/metro/src/lib/__tests__/parseCustomTransformOptions-test.js
index 056ee9850c..4ea629dc72 100644
--- a/packages/metro/src/lib/__tests__/parseCustomTransformOptions-test.js
+++ b/packages/metro/src/lib/__tests__/parseCustomTransformOptions-test.js
@@ -9,9 +9,8 @@
  * @oncall react_native
  */
 
-'use strict';
+import parseCustomTransformOptions from '../parseCustomTransformOptions';
 
-const parseCustomTransformOptions = require('../parseCustomTransformOptions');
 const url = require('url');
 
 test('should parse some custom options from a http url', () => {
diff --git a/packages/metro/src/lib/__tests__/parseOptionsFromUrl-test.js b/packages/metro/src/lib/__tests__/parseOptionsFromUrl-test.js
index ea6c8f6ebd..acef9778d7 100644
--- a/packages/metro/src/lib/__tests__/parseOptionsFromUrl-test.js
+++ b/packages/metro/src/lib/__tests__/parseOptionsFromUrl-test.js
@@ -9,9 +9,7 @@
  * @oncall react_native
  */
 
-'use strict';
-
-const parseOptionsFromUrl = require('../parseOptionsFromUrl');
+import parseOptionsFromUrl from '../parseOptionsFromUrl';
 
 describe('parseOptionsFromUrl', () => {
   test.each([['map'], ['bundle']])('detects %s requests', type => {
diff --git a/packages/metro/src/lib/bundleToString.js b/packages/metro/src/lib/bundleToString.js
index 268d9ba23d..fe4a3eff80 100644
--- a/packages/metro/src/lib/bundleToString.js
+++ b/packages/metro/src/lib/bundleToString.js
@@ -9,14 +9,12 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {Bundle, BundleMetadata} from 'metro-runtime/src/modules/types';
 
 /**
  * Serializes a bundle into a plain JS bundle.
  */
-function bundleToString(bundle: Bundle): {
+export default function bundleToString(bundle: Bundle): {
   +code: string,
   +metadata: BundleMetadata,
 } {
@@ -47,5 +45,3 @@ function bundleToString(bundle: Bundle): {
     metadata: {pre: bundle.pre.length, post: bundle.post.length, modules},
   };
 }
-
-module.exports = bundleToString;
diff --git a/packages/metro/src/lib/countLines.js b/packages/metro/src/lib/countLines.js
index 38175489c6..56ccbf9df1 100644
--- a/packages/metro/src/lib/countLines.js
+++ b/packages/metro/src/lib/countLines.js
@@ -9,11 +9,9 @@
  * @oncall react_native
  */
 
-'use strict';
-
 const newline = /\r\n?|\n|\u2028|\u2029/g;
 
 const countLines = (string: string): number =>
   (string.match(newline) || []).length + 1;
 
-module.exports = countLines;
+export default countLines;
diff --git a/packages/metro/src/lib/createModuleIdFactory.js b/packages/metro/src/lib/createModuleIdFactory.js
index 24e964fe04..bd15cf1686 100644
--- a/packages/metro/src/lib/createModuleIdFactory.js
+++ b/packages/metro/src/lib/createModuleIdFactory.js
@@ -9,9 +9,7 @@
  * @oncall react_native
  */
 
-'use strict';
-
-function createModuleIdFactory(): (path: string) => number {
+export default function createModuleIdFactory(): (path: string) => number {
   const fileToIdMap: Map<string, number> = new Map();
   let nextId = 0;
   return (path: string) => {
@@ -23,5 +21,3 @@ function createModuleIdFactory(): (path: string) => number {
     return id;
   };
 }
-
-module.exports = createModuleIdFactory;
diff --git a/packages/metro/src/lib/createWebsocketServer.js b/packages/metro/src/lib/createWebsocketServer.js
index b5291ddbd0..a9076dfa50 100644
--- a/packages/metro/src/lib/createWebsocketServer.js
+++ b/packages/metro/src/lib/createWebsocketServer.js
@@ -41,7 +41,7 @@ type HMROptions<TClient> = {
  *   - onClientDisconnect
  */
 
-module.exports = function createWebsocketServer<TClient: Object>({
+export default function createWebsocketServer<TClient: Object>({
   websocketServer,
 }: HMROptions<TClient>): ws.Server {
   const wss = new ws.Server({
@@ -84,4 +84,4 @@ module.exports = function createWebsocketServer<TClient: Object>({
   });
 
   return wss;
-};
+}
diff --git a/packages/metro/src/lib/debounceAsyncQueue.js b/packages/metro/src/lib/debounceAsyncQueue.js
index bc7934672c..fad7cc1aa8 100644
--- a/packages/metro/src/lib/debounceAsyncQueue.js
+++ b/packages/metro/src/lib/debounceAsyncQueue.js
@@ -9,11 +9,9 @@
  * @oncall react_native
  */
 
-'use strict';
-
 // Debounces calls with the given delay, and queues the next call while the
 // previous one hasn't completed so that no two calls can execute concurrently.
-function debounceAsyncQueue<T>(
+export default function debounceAsyncQueue<T>(
   fn: () => Promise<T>,
   delay: number,
 ): () => Promise<T> {
@@ -51,5 +49,3 @@ function debounceAsyncQueue<T>(
       }
     });
 }
-
-module.exports = debounceAsyncQueue;
diff --git a/packages/metro/src/lib/formatBundlingError.js b/packages/metro/src/lib/formatBundlingError.js
index 261a33e69f..d0cd3d92dc 100644
--- a/packages/metro/src/lib/formatBundlingError.js
+++ b/packages/metro/src/lib/formatBundlingError.js
@@ -8,21 +8,17 @@
  * @flow
  */
 
-'use strict';
-
 import type {FormattedError} from 'metro-runtime/src/modules/types';
 
-const GraphNotFoundError = require('../IncrementalBundler/GraphNotFoundError');
-const ResourceNotFoundError = require('../IncrementalBundler/ResourceNotFoundError');
-const RevisionNotFoundError = require('../IncrementalBundler/RevisionNotFoundError');
-const {
-  UnableToResolveError,
-} = require('../node-haste/DependencyGraph/ModuleResolution');
-const {codeFrameColumns} = require('@babel/code-frame');
-const ErrorStackParser = require('error-stack-parser');
-const fs = require('fs');
-const {AmbiguousModuleResolutionError} = require('metro-core');
-const serializeError = require('serialize-error');
+import GraphNotFoundError from '../IncrementalBundler/GraphNotFoundError';
+import ResourceNotFoundError from '../IncrementalBundler/ResourceNotFoundError';
+import RevisionNotFoundError from '../IncrementalBundler/RevisionNotFoundError';
+import {UnableToResolveError} from '../node-haste/DependencyGraph/ModuleResolution';
+import {codeFrameColumns} from '@babel/code-frame';
+import ErrorStackParser from 'error-stack-parser';
+import fs from 'fs';
+import {AmbiguousModuleResolutionError} from 'metro-core';
+import serializeError from 'serialize-error';
 
 export type CustomError = Error &
   interface {
@@ -37,7 +33,9 @@ export type CustomError = Error &
     }>,
   };
 
-function formatBundlingError(error: CustomError): FormattedError {
+export default function formatBundlingError(
+  error: CustomError,
+): FormattedError {
   if (error instanceof AmbiguousModuleResolutionError) {
     const he = error.hasteError;
     const message =
@@ -120,5 +118,3 @@ function formatBundlingError(error: CustomError): FormattedError {
     };
   }
 }
-
-module.exports = formatBundlingError;
diff --git a/packages/metro/src/lib/getAppendScripts.js b/packages/metro/src/lib/getAppendScripts.js
index 2038994bc2..9eae15f1b9 100644
--- a/packages/metro/src/lib/getAppendScripts.js
+++ b/packages/metro/src/lib/getAppendScripts.js
@@ -9,18 +9,14 @@
  * @oncall react_native
  */
 
-'use strict';
 import type {Module} from '../DeltaBundler';
 import type {Dependency} from '../DeltaBundler/types';
 
+import getInlineSourceMappingURL from '../DeltaBundler/Serializers/helpers/getInlineSourceMappingURL';
+import {sourceMapString} from '../DeltaBundler/Serializers/sourceMapString';
 import CountingSet from './CountingSet';
-
-const getInlineSourceMappingURL = require('../DeltaBundler/Serializers/helpers/getInlineSourceMappingURL');
-const {
-  sourceMapString,
-} = require('../DeltaBundler/Serializers/sourceMapString');
-const countLines = require('./countLines');
-const nullthrows = require('nullthrows');
+import countLines from './countLines';
+import nullthrows from 'nullthrows';
 
 type Options<T: number | string> = $ReadOnly<{
   asyncRequireModulePath: string,
@@ -36,7 +32,7 @@ type Options<T: number | string> = $ReadOnly<{
   ...
 }>;
 
-function getAppendScripts<T: number | string>(
+export default function getAppendScripts<T: number | string>(
   entryPoint: string,
   modules: $ReadOnlyArray<Module<>>,
   options: Options<T>,
@@ -124,5 +120,3 @@ function getAppendScripts<T: number | string>(
 
   return output;
 }
-
-module.exports = getAppendScripts;
diff --git a/packages/metro/src/lib/getGraphId.js b/packages/metro/src/lib/getGraphId.js
index 65d76d4231..49916d08a2 100644
--- a/packages/metro/src/lib/getGraphId.js
+++ b/packages/metro/src/lib/getGraphId.js
@@ -9,16 +9,14 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {TransformInputOptions} from '../DeltaBundler/types';
 import type {ResolverInputOptions} from '../shared/types';
 
-const canonicalize = require('metro-core/private/canonicalize');
+import canonicalize from 'metro-core/private/canonicalize';
 
 export opaque type GraphId: string = string;
 
-function getGraphId(
+export default function getGraphId(
   entryFile: string,
   options: TransformInputOptions,
   {
@@ -56,5 +54,3 @@ function getGraphId(
     canonicalize,
   );
 }
-
-module.exports = getGraphId;
diff --git a/packages/metro/src/lib/getMaxWorkers.js b/packages/metro/src/lib/getMaxWorkers.js
index 3b75786a94..59320ae3fb 100644
--- a/packages/metro/src/lib/getMaxWorkers.js
+++ b/packages/metro/src/lib/getMaxWorkers.js
@@ -9,11 +9,9 @@
  * @oncall react_native
  */
 
-'use strict';
+import os from 'os';
 
-const os = require('os');
-
-module.exports = (workers: ?number): number => {
+export default (workers: ?number): number => {
   // $FlowFixMe[prop-missing] Missing Flow lib def for availableParallelism
   const cores = os.availableParallelism();
   return typeof workers === 'number' && Number.isInteger(workers)
diff --git a/packages/metro/src/lib/getPreludeCode.js b/packages/metro/src/lib/getPreludeCode.js
index f1dcecee66..3b2d2c2027 100644
--- a/packages/metro/src/lib/getPreludeCode.js
+++ b/packages/metro/src/lib/getPreludeCode.js
@@ -9,9 +9,7 @@
  * @oncall react_native
  */
 
-'use strict';
-
-function getPreludeCode({
+export default function getPreludeCode({
   extraVars,
   isDev,
   globalPrefix,
@@ -69,5 +67,3 @@ function processEnv(nodeEnv: string): string {
     nodeEnv,
   )};`;
 }
-
-module.exports = getPreludeCode;
diff --git a/packages/metro/src/lib/getPrependedScripts.js b/packages/metro/src/lib/getPrependedScripts.js
index 2c8836c29b..42c3b2f03f 100644
--- a/packages/metro/src/lib/getPrependedScripts.js
+++ b/packages/metro/src/lib/getPrependedScripts.js
@@ -9,8 +9,6 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type Bundler from '../Bundler';
 import type DeltaBundler, {Module} from '../DeltaBundler';
 import type {TransformInputOptions} from '../DeltaBundler/types';
@@ -18,13 +16,12 @@ import type {ResolverInputOptions} from '../shared/types';
 import type {ConfigT} from 'metro-config';
 
 import CountingSet from './CountingSet';
+import countLines from './countLines';
+import getPreludeCode from './getPreludeCode';
+import * as transformHelpers from './transformHelpers';
+import * as defaults from 'metro-config/private/defaults/defaults';
 
-const countLines = require('./countLines');
-const getPreludeCode = require('./getPreludeCode');
-const transformHelpers = require('./transformHelpers');
-const defaults = require('metro-config/private/defaults/defaults');
-
-async function getPrependedScripts(
+export default async function getPrependedScripts(
   config: ConfigT,
   options: Omit<TransformInputOptions, 'type'>,
   resolverOptions: ResolverInputOptions,
@@ -115,5 +112,3 @@ function _getPrelude({
     ],
   };
 }
-
-module.exports = getPrependedScripts;
diff --git a/packages/metro/src/lib/logToConsole.js b/packages/metro/src/lib/logToConsole.js
index 68df433c73..f8853d3970 100644
--- a/packages/metro/src/lib/logToConsole.js
+++ b/packages/metro/src/lib/logToConsole.js
@@ -10,17 +10,15 @@
 
 /* eslint-disable no-console */
 
-'use strict';
-
 import type {Terminal} from 'metro-core';
 
-const chalk = require('chalk');
-const util = require('util');
+import chalk from 'chalk';
+import util from 'util';
 
 const groupStack = [];
 let collapsedGuardTimer;
 
-module.exports = (terminal: Terminal, level: string, ...data: Array<mixed>) => {
+export default (terminal: Terminal, level: string, ...data: Array<mixed>) => {
   // $FlowFixMe[invalid-computed-prop]
   const logFunction = console[level] && level !== 'trace' ? level : 'log';
   const color =
diff --git a/packages/metro/src/lib/parseCustomResolverOptions.js b/packages/metro/src/lib/parseCustomResolverOptions.js
index 1012c48692..6515bd4597 100644
--- a/packages/metro/src/lib/parseCustomResolverOptions.js
+++ b/packages/metro/src/lib/parseCustomResolverOptions.js
@@ -9,15 +9,13 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {CustomResolverOptions} from '../../../metro-resolver/src/types';
 
-const nullthrows = require('nullthrows');
+import nullthrows from 'nullthrows';
 
 const PREFIX = 'resolver.';
 
-module.exports = function parseCustomResolverOptions(urlObj: {
+export default function parseCustomResolverOptions(urlObj: {
   +query?: {[string]: string, ...},
   ...
 }): CustomResolverOptions {
@@ -35,4 +33,4 @@ module.exports = function parseCustomResolverOptions(urlObj: {
   });
 
   return customResolverOptions;
-};
+}
diff --git a/packages/metro/src/lib/parseCustomTransformOptions.js b/packages/metro/src/lib/parseCustomTransformOptions.js
index b327ac2190..629a679473 100644
--- a/packages/metro/src/lib/parseCustomTransformOptions.js
+++ b/packages/metro/src/lib/parseCustomTransformOptions.js
@@ -9,15 +9,13 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {CustomTransformOptions} from 'metro-transform-worker';
 
-const nullthrows = require('nullthrows');
+import nullthrows from 'nullthrows';
 
 const PREFIX = 'transform.';
 
-module.exports = function parseCustomTransformOptions(urlObj: {
+export default function parseCustomTransformOptions(urlObj: {
   +query?: {[string]: string, ...},
   ...
 }): CustomTransformOptions {
@@ -32,4 +30,4 @@ module.exports = function parseCustomTransformOptions(urlObj: {
   });
 
   return customTransformOptions;
-};
+}
diff --git a/packages/metro/src/lib/parseJsonBody.js b/packages/metro/src/lib/parseJsonBody.js
index 26447d3d0a..3bb734fb8c 100644
--- a/packages/metro/src/lib/parseJsonBody.js
+++ b/packages/metro/src/lib/parseJsonBody.js
@@ -17,7 +17,7 @@ const SIZE_LIMIT = 100 * 1024 * 1024; // 100MB
 /**
  * Attempt to parse a request body as JSON.
  */
-function parseJsonBody(
+export default function parseJsonBody(
   req: IncomingMessage,
   options: {strict?: boolean} = {},
 ): Promise<$FlowFixMe> {
@@ -56,5 +56,3 @@ function parseJsonBody(
     });
   });
 }
-
-module.exports = parseJsonBody;
diff --git a/packages/metro/src/lib/parseOptionsFromUrl.js b/packages/metro/src/lib/parseOptionsFromUrl.js
index 22e2ac19d6..443e561d0c 100644
--- a/packages/metro/src/lib/parseOptionsFromUrl.js
+++ b/packages/metro/src/lib/parseOptionsFromUrl.js
@@ -9,20 +9,17 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {BundleOptions} from '../shared/types';
 import type {TransformProfile} from 'metro-babel-transformer';
 
+import parsePlatformFilePath from '../node-haste/lib/parsePlatformFilePath';
 import {SourcePathsMode} from '../shared/types';
-
-const parsePlatformFilePath = require('../node-haste/lib/parsePlatformFilePath');
-const parseCustomResolverOptions = require('./parseCustomResolverOptions');
-const parseCustomTransformOptions = require('./parseCustomTransformOptions');
-const jscSafeUrl = require('jsc-safe-url');
-const nullthrows = require('nullthrows');
-const path = require('path');
-const url = require('url');
+import parseCustomResolverOptions from './parseCustomResolverOptions';
+import parseCustomTransformOptions from './parseCustomTransformOptions';
+import * as jscSafeUrl from 'jsc-safe-url';
+import nullthrows from 'nullthrows';
+import path from 'path';
+import url from 'url';
 
 const getBoolean = (
   query: $ReadOnly<{[opt: string]: string}>,
@@ -41,7 +38,7 @@ const getTransformProfile = (transformProfile: string): TransformProfile =>
     ? transformProfile
     : 'default';
 
-module.exports = function parseOptionsFromUrl(
+export default function parseOptionsFromUrl(
   normalizedRequestUrl: string,
   platforms: Set<string>,
 ): {
@@ -94,4 +91,4 @@ module.exports = function parseOptionsFromUrl(
       query.unstable_transformProfile,
     ),
   };
-};
+}
diff --git a/packages/metro/src/lib/relativizeSourceMap.js b/packages/metro/src/lib/relativizeSourceMap.js
index 2edc28f144..9d5bdf1696 100644
--- a/packages/metro/src/lib/relativizeSourceMap.js
+++ b/packages/metro/src/lib/relativizeSourceMap.js
@@ -9,13 +9,11 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {MixedSourceMap} from 'metro-source-map';
 
-const path = require('path');
+import path from 'path';
 
-function relativizeSourceMapInline(
+export default function relativizeSourceMapInline(
   sourceMap: MixedSourceMap,
   sourcesRoot: string,
 ): void {
@@ -30,5 +28,3 @@ function relativizeSourceMapInline(
     }
   }
 }
-
-module.exports = relativizeSourceMapInline;
diff --git a/packages/metro/src/lib/reporting.js b/packages/metro/src/lib/reporting.js
index fc16b66e68..1b690d7741 100644
--- a/packages/metro/src/lib/reporting.js
+++ b/packages/metro/src/lib/reporting.js
@@ -9,15 +9,13 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {Terminal} from 'metro-core';
 import type {HealthCheckResult, WatcherStatus} from 'metro-file-map';
 import type {CustomResolverOptions} from 'metro-resolver';
 import type {CustomTransformOptions} from 'metro-transform-worker';
 
-const chalk = require('chalk');
-const util = require('util');
+import chalk from 'chalk';
+import util from 'util';
 
 export type BundleDetails = {
   bundleType: string,
@@ -186,7 +184,7 @@ export type Reporter = interface {update(event: ReportableEvent): void};
  * calling this, add a new type of ReportableEvent instead, and implement a
  * proper handler in the reporter(s).
  */
-function logWarning(
+export function logWarning(
   terminal: Terminal,
   format: string,
   ...args: Array<mixed>
@@ -198,7 +196,7 @@ function logWarning(
 /**
  * Similar to `logWarning`, but for messages that require the user to act.
  */
-function logError(
+export function logError(
   terminal: Terminal,
   format: string,
   ...args: Array<mixed>
@@ -220,7 +218,7 @@ function logError(
 /**
  * Similar to `logWarning`, but for informational messages.
  */
-function logInfo(
+export function logInfo(
   terminal: Terminal,
   format: string,
   ...args: Array<mixed>
@@ -233,11 +231,4 @@ function logInfo(
  * A reporter that does nothing. Errors and warnings will be swallowed, that
  * is generally not what you want.
  */
-const nullReporter = {update(): void {}};
-
-module.exports = {
-  logWarning,
-  logError,
-  logInfo,
-  nullReporter,
-};
+export const nullReporter = {update(): void {}};
diff --git a/packages/metro/src/lib/splitBundleOptions.js b/packages/metro/src/lib/splitBundleOptions.js
index 81c51ee281..b52dab95f8 100644
--- a/packages/metro/src/lib/splitBundleOptions.js
+++ b/packages/metro/src/lib/splitBundleOptions.js
@@ -9,14 +9,14 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {BundleOptions, SplitBundleOptions} from '../shared/types';
 
 /**
  * Splits a BundleOptions object into smaller, more manageable parts.
  */
-function splitBundleOptions(options: BundleOptions): SplitBundleOptions {
+export default function splitBundleOptions(
+  options: BundleOptions,
+): SplitBundleOptions {
   return {
     entryFile: options.entryFile,
     resolverOptions: {
@@ -48,5 +48,3 @@ function splitBundleOptions(options: BundleOptions): SplitBundleOptions {
     onProgress: options.onProgress,
   };
 }
-
-module.exports = splitBundleOptions;
diff --git a/packages/metro/src/lib/transformHelpers.js b/packages/metro/src/lib/transformHelpers.js
index 28d6c07006..8a432e2b7c 100644
--- a/packages/metro/src/lib/transformHelpers.js
+++ b/packages/metro/src/lib/transformHelpers.js
@@ -9,8 +9,6 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type Bundler from '../Bundler';
 import type DeltaBundler, {TransformFn} from '../DeltaBundler';
 import type {
@@ -138,7 +136,7 @@ function removeInlineRequiresBlockListFromOptions(
   return inlineRequires;
 }
 
-async function getTransformFn(
+export async function getTransformFn(
   entryFiles: $ReadOnlyArray<string>,
   bundler: Bundler,
   deltaBundler: DeltaBundler<>,
@@ -213,7 +211,7 @@ function getType(
   return 'module';
 }
 
-async function getResolveDependencyFn(
+export async function getResolveDependencyFn(
   bundler: Bundler,
   platform: ?string,
   resolverOptions: ResolverInputOptions,
@@ -230,8 +228,3 @@ async function getResolveDependencyFn(
       resolverOptions,
     );
 }
-
-module.exports = {
-  getTransformFn,
-  getResolveDependencyFn,
-};
diff --git a/packages/metro/src/node-haste/DependencyGraph.js b/packages/metro/src/node-haste/DependencyGraph.js
index 2fa82cd95f..c905dc9140 100644
--- a/packages/metro/src/node-haste/DependencyGraph.js
+++ b/packages/metro/src/node-haste/DependencyGraph.js
@@ -25,22 +25,23 @@ import type MetroFileMap, {
 } from 'metro-file-map';
 import type {FileSystemLookup} from 'metro-resolver';
 
+import createFileMap from './DependencyGraph/createFileMap';
+import {ModuleResolver} from './DependencyGraph/ModuleResolution';
 import {PackageCache} from './PackageCache';
-import {DuplicateHasteCandidatesError} from 'metro-file-map';
-
-const createFileMap = require('./DependencyGraph/createFileMap');
-const {ModuleResolver} = require('./DependencyGraph/ModuleResolution');
-const {EventEmitter} = require('events');
-const fs = require('fs');
-const {
+import EventEmitter from 'events';
+import fs from 'fs';
+import {
   AmbiguousModuleResolutionError,
-  Logger: {createActionStartEntry, createActionEndEntry, log},
+  Logger,
   PackageResolutionError,
-} = require('metro-core');
-const canonicalize = require('metro-core/private/canonicalize');
-const {InvalidPackageError} = require('metro-resolver');
-const nullthrows = require('nullthrows');
-const path = require('path');
+} from 'metro-core';
+import canonicalize from 'metro-core/private/canonicalize';
+import {DuplicateHasteCandidatesError} from 'metro-file-map';
+import {InvalidPackageError} from 'metro-resolver';
+import nullthrows from 'nullthrows';
+import path from 'path';
+
+const {createActionStartEntry, createActionEndEntry, log} = Logger;
 
 const NULL_PLATFORM = Symbol();
 
@@ -56,7 +57,7 @@ function getOrCreateMap<T>(
   return subMap;
 }
 
-class DependencyGraph extends EventEmitter {
+export default class DependencyGraph extends EventEmitter {
   _config: ConfigT;
   _haste: MetroFileMap;
   _fileSystem: FileSystem;
@@ -393,5 +394,3 @@ class DependencyGraph extends EventEmitter {
     return nullthrows(this._fileSystem.getDependencies(filePath));
   }
 }
-
-module.exports = DependencyGraph;
diff --git a/packages/metro/src/node-haste/DependencyGraph/ModuleResolution.js b/packages/metro/src/node-haste/DependencyGraph/ModuleResolution.js
index 268b08ff1e..8f354fce06 100644
--- a/packages/metro/src/node-haste/DependencyGraph/ModuleResolution.js
+++ b/packages/metro/src/node-haste/DependencyGraph/ModuleResolution.js
@@ -9,8 +9,6 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {
   BundlerResolution,
   TransformResultDependency,
@@ -27,13 +25,13 @@ import type {
 } from 'metro-resolver';
 import type {PackageForModule, PackageJson} from 'metro-resolver/private/types';
 
-const {codeFrameColumns} = require('@babel/code-frame');
-const fs = require('fs');
-const invariant = require('invariant');
-const Resolver = require('metro-resolver');
-const createDefaultContext = require('metro-resolver/private/createDefaultContext');
-const path = require('path');
-const util = require('util');
+import {codeFrameColumns} from '@babel/code-frame';
+import fs from 'fs';
+import invariant from 'invariant';
+import * as Resolver from 'metro-resolver';
+import createDefaultContext from 'metro-resolver/private/createDefaultContext';
+import path from 'path';
+import util from 'util';
 
 export type DirExistsFn = (filePath: string) => boolean;
 
@@ -84,7 +82,7 @@ type Options<TPackage> = $ReadOnly<{
   unstable_enablePackageExports: boolean,
 }>;
 
-class ModuleResolver<TPackage: Packageish> {
+export class ModuleResolver<TPackage: Packageish> {
   _options: Options<TPackage>;
   // A module representing the project root, used as the origin when resolving `emptyModulePath`.
   _projectRootFakeModulePath: string;
@@ -320,7 +318,7 @@ function getArrayLowestItem(a: $ReadOnlyArray<string>): string | void {
 }
 
 // $FlowFixMe[incompatible-extend]
-class UnableToResolveError extends Error {
+export class UnableToResolveError extends Error {
   /**
    * File path of the module that tried to require a module, ex. `/js/foo.js`.
    */
@@ -482,8 +480,3 @@ function guessDependencyLocation(
 function isQuote(str: ?string): boolean {
   return str === '"' || str === "'" || str === '`';
 }
-
-module.exports = {
-  ModuleResolver,
-  UnableToResolveError,
-};
diff --git a/packages/metro/src/node-haste/DependencyGraph/createFileMap.js b/packages/metro/src/node-haste/DependencyGraph/createFileMap.js
index 9c3fe200d1..cde3e4c933 100644
--- a/packages/metro/src/node-haste/DependencyGraph/createFileMap.js
+++ b/packages/metro/src/node-haste/DependencyGraph/createFileMap.js
@@ -11,10 +11,9 @@
 
 import type {ConfigT} from 'metro-config';
 
+import ci from 'ci-info';
 import MetroFileMap, {DiskCacheManager} from 'metro-file-map';
 
-const ci = require('ci-info');
-
 function getIgnorePattern(config: ConfigT): RegExp {
   // For now we support both options
   const {blockList, blacklistRE} = config.resolver;
@@ -53,7 +52,7 @@ function getIgnorePattern(config: ConfigT): RegExp {
   return ignorePattern;
 }
 
-function createFileMap(
+export default function createFileMap(
   config: ConfigT,
   options?: $ReadOnly<{
     extractDependencies?: boolean,
@@ -114,5 +113,3 @@ function createFileMap(
     watchmanDeferStates: config.watcher.watchman.deferStates,
   });
 }
-
-module.exports = createFileMap;
diff --git a/packages/metro/src/node-haste/Package.js b/packages/metro/src/node-haste/Package.js
index ab8e0efe96..ad906ee3f4 100644
--- a/packages/metro/src/node-haste/Package.js
+++ b/packages/metro/src/node-haste/Package.js
@@ -9,14 +9,12 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {PackageJson} from 'metro-resolver/private/types';
 
-const fs = require('fs');
-const path = require('path');
+import fs from 'fs';
+import path from 'path';
 
-class Package {
+export default class Package {
   path: string;
 
   _root: string;
@@ -39,5 +37,3 @@ class Package {
     return this._content;
   }
 }
-
-module.exports = Package;
diff --git a/packages/metro/src/node-haste/PackageCache.js b/packages/metro/src/node-haste/PackageCache.js
index bb9666c0f4..74323a719b 100644
--- a/packages/metro/src/node-haste/PackageCache.js
+++ b/packages/metro/src/node-haste/PackageCache.js
@@ -9,9 +9,7 @@
  * @oncall react_native
  */
 
-'use strict';
-
-const Package = require('./Package');
+import Package from './Package';
 
 type GetClosestPackageFn = (absoluteFilePath: string) => ?{
   packageJsonPath: string,
diff --git a/packages/metro/src/node-haste/__mocks__/graceful-fs.js b/packages/metro/src/node-haste/__mocks__/graceful-fs.js
index 93a6690417..c41ced118d 100644
--- a/packages/metro/src/node-haste/__mocks__/graceful-fs.js
+++ b/packages/metro/src/node-haste/__mocks__/graceful-fs.js
@@ -8,6 +8,4 @@
  * @flow strict
  */
 
-'use strict';
-
-module.exports = require('fs');
+export * from 'fs';
diff --git a/packages/metro/src/node-haste/lib/AssetPaths.js b/packages/metro/src/node-haste/lib/AssetPaths.js
index def6ae72a6..c9963e53be 100644
--- a/packages/metro/src/node-haste/lib/AssetPaths.js
+++ b/packages/metro/src/node-haste/lib/AssetPaths.js
@@ -9,10 +9,8 @@
  * @oncall react_native
  */
 
-'use strict';
-
-const parsePlatformFilePath = require('./parsePlatformFilePath');
-const path = require('path');
+import parsePlatformFilePath from './parsePlatformFilePath';
+import path from 'path';
 
 export type AssetPath = {
   assetName: string,
@@ -47,7 +45,7 @@ function parseBaseName(baseName: string): {
  * Return `null` if the `filePath` doesn't have a valid extension, required
  * to describe the type of an asset.
  */
-function tryParse(
+export function tryParse(
   filePath: string,
   platforms: $ReadOnlySet<string>,
 ): ?AssetPath {
@@ -66,12 +64,13 @@ function tryParse(
   };
 }
 
-function parse(filePath: string, platforms: $ReadOnlySet<string>): AssetPath {
+export function parse(
+  filePath: string,
+  platforms: $ReadOnlySet<string>,
+): AssetPath {
   const result = tryParse(filePath, platforms);
   if (result == null) {
     throw new Error(`invalid asset file path: ${filePath}`);
   }
   return result;
 }
-
-module.exports = {parse, tryParse};
diff --git a/packages/metro/src/node-haste/lib/__tests__/parsePlatformFilePath-test.js b/packages/metro/src/node-haste/lib/__tests__/parsePlatformFilePath-test.js
index 0e8cb15b8b..b2dea13a68 100644
--- a/packages/metro/src/node-haste/lib/__tests__/parsePlatformFilePath-test.js
+++ b/packages/metro/src/node-haste/lib/__tests__/parsePlatformFilePath-test.js
@@ -9,9 +9,7 @@
  * @oncall react_native
  */
 
-'use strict';
-
-var parsePlatformFilePath = require('../parsePlatformFilePath');
+import parsePlatformFilePath from '../parsePlatformFilePath';
 
 const TEST_PLATFORMS = new Set(['ios', 'android']);
 
diff --git a/packages/metro/src/node-haste/lib/parsePlatformFilePath.js b/packages/metro/src/node-haste/lib/parsePlatformFilePath.js
index 310965ce1a..6d0fefd2dd 100644
--- a/packages/metro/src/node-haste/lib/parsePlatformFilePath.js
+++ b/packages/metro/src/node-haste/lib/parsePlatformFilePath.js
@@ -9,9 +9,7 @@
  * @oncall react_native
  */
 
-'use strict';
-
-const path = require('path');
+import path from 'path';
 
 type PlatformFilePathParts = {
   dirPath: string,
@@ -26,7 +24,7 @@ const PATH_RE = /^(.+?)(\.([^.]+))?\.([^.]+)$/;
  * Extract the components of a file path that can have a platform specifier: Ex.
  * `index.ios.js` is specific to the `ios` platform and has the extension `js`.
  */
-function parsePlatformFilePath(
+export default function parsePlatformFilePath(
   filePath: string,
   platforms: $ReadOnlySet<string>,
 ): PlatformFilePathParts {
@@ -44,5 +42,3 @@ function parsePlatformFilePath(
   const baseName = `${match[1]}.${platform}`;
   return {dirPath, baseName, platform: null, extension};
 }
-
-module.exports = parsePlatformFilePath;
diff --git a/packages/metro/src/shared/output/RamBundle.js b/packages/metro/src/shared/output/RamBundle.js
index ff57368c9f..d53db786fb 100644
--- a/packages/metro/src/shared/output/RamBundle.js
+++ b/packages/metro/src/shared/output/RamBundle.js
@@ -9,16 +9,14 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {RamBundleInfo} from '../../DeltaBundler/Serializers/getRamBundleInfo';
 import type {OutputOptions, RequestOptions} from '../types';
 
-const Server = require('../../Server');
-const asAssets = require('./RamBundle/as-assets');
-const asIndexedFile = require('./RamBundle/as-indexed-file').save;
+import Server from '../../Server';
+import asAssets from './RamBundle/as-assets';
+import {save as asIndexedFile} from './RamBundle/as-indexed-file';
 
-async function build(
+export async function build(
   packagerClient: Server,
   requestOptions: RequestOptions,
 ): Promise<RamBundleInfo> {
@@ -31,7 +29,7 @@ async function build(
   return await packagerClient.getRamBundleInfo(options);
 }
 
-function save(
+export function save(
   bundle: RamBundleInfo,
   options: OutputOptions,
   log: (x: string) => void,
@@ -44,6 +42,4 @@ function save(
     : asIndexedFile(bundle, options, log);
 }
 
-exports.build = build;
-exports.save = save;
-exports.formatName = 'bundle';
+export const formatName = 'bundle';
diff --git a/packages/metro/src/shared/output/RamBundle/as-assets.js b/packages/metro/src/shared/output/RamBundle/as-assets.js
index 9979b46ca9..c85b1f2d3b 100644
--- a/packages/metro/src/shared/output/RamBundle/as-assets.js
+++ b/packages/metro/src/shared/output/RamBundle/as-assets.js
@@ -9,20 +9,19 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {RamBundleInfo} from '../../../DeltaBundler/Serializers/getRamBundleInfo';
 import type {ModuleTransportLike} from '../../../shared/types';
 import type {OutputOptions} from '../../types';
 
-const relativizeSourceMapInline = require('../../../lib/relativizeSourceMap');
-const writeFile = require('../writeFile');
-const buildSourcemapWithMetadata = require('./buildSourcemapWithMetadata');
-const MAGIC_RAM_BUNDLE_NUMBER = require('./magic-number');
-const {joinModules} = require('./util');
-const writeSourceMap = require('./write-sourcemap');
-const fsPromises = require('fs').promises;
-const path = require('path');
+import relativizeSourceMapInline from '../../../lib/relativizeSourceMap';
+import writeFile from '../writeFile';
+import buildSourcemapWithMetadata from './buildSourcemapWithMetadata';
+import MAGIC_RAM_BUNDLE_NUMBER from './magic-number';
+import {joinModules} from './util';
+import writeSourceMap from './write-sourcemap';
+import {promises as fsPromises} from 'fs';
+import path from 'path';
+
 // must not start with a dot, as that won't go into the apk
 const MAGIC_RAM_BUNDLE_FILENAME = 'UNBUNDLE';
 const MODULES_DIR = 'js-modules';
@@ -34,7 +33,7 @@ const MODULES_DIR = 'js-modules';
  * All other modules go into a 'js-modules' folder that in the same parent
  * directory as the startup file.
  */
-function saveAsAssets(
+export default function saveAsAssets(
   bundle: RamBundleInfo,
   options: OutputOptions,
   log: (...args: Array<string>) => void,
@@ -123,5 +122,3 @@ function writeMagicFlagFile(outputDir: string): Promise<mixed> {
   buffer.writeUInt32LE(MAGIC_RAM_BUNDLE_NUMBER, 0);
   return writeFile(path.join(outputDir, MAGIC_RAM_BUNDLE_FILENAME), buffer);
 }
-
-module.exports = saveAsAssets;
diff --git a/packages/metro/src/shared/output/RamBundle/as-indexed-file.js b/packages/metro/src/shared/output/RamBundle/as-indexed-file.js
index 0e509a9f83..da67726e1b 100644
--- a/packages/metro/src/shared/output/RamBundle/as-indexed-file.js
+++ b/packages/metro/src/shared/output/RamBundle/as-indexed-file.js
@@ -9,8 +9,6 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {RamBundleInfo} from '../../../DeltaBundler/Serializers/getRamBundleInfo';
 import type {
   ModuleGroups,
@@ -19,12 +17,12 @@ import type {
 } from '../../types';
 import type {WriteStream} from 'fs';
 
-const relativizeSourceMapInline = require('../../../lib/relativizeSourceMap');
-const buildSourcemapWithMetadata = require('./buildSourcemapWithMetadata');
-const MAGIC_UNBUNDLE_FILE_HEADER = require('./magic-number');
-const {joinModules} = require('./util');
-const writeSourceMap = require('./write-sourcemap');
-const fs = require('fs');
+import relativizeSourceMapInline from '../../../lib/relativizeSourceMap';
+import buildSourcemapWithMetadata from './buildSourcemapWithMetadata';
+import MAGIC_UNBUNDLE_FILE_HEADER from './magic-number';
+import {joinModules} from './util';
+import writeSourceMap from './write-sourcemap';
+import fs from 'fs';
 
 const SIZEOF_UINT32 = 4;
 
@@ -35,7 +33,7 @@ const SIZEOF_UINT32 = 4;
  * The module id for the startup code (prelude, polyfills etc.) is the
  * empty string.
  */
-function saveAsIndexedFile(
+export function save(
   bundle: RamBundleInfo,
   options: OutputOptions,
   log: (...args: Array<string>) => void,
@@ -217,7 +215,7 @@ function buildModuleBuffers(
     );
 }
 
-function buildTableAndContents(
+export function buildTableAndContents(
   startupCode: string,
   modules: $ReadOnlyArray<ModuleTransportLike>,
   moduleGroups: ModuleGroups,
@@ -242,7 +240,7 @@ function buildTableAndContents(
   );
 }
 
-function createModuleGroups(
+export function createModuleGroups(
   groups: Map<number, Set<number>>,
   modules: $ReadOnlyArray<ModuleTransportLike>,
 ): ModuleGroups {
@@ -260,7 +258,3 @@ function* concat(
     yield* it;
   }
 }
-
-exports.save = saveAsIndexedFile;
-exports.buildTableAndContents = buildTableAndContents;
-exports.createModuleGroups = createModuleGroups;
diff --git a/packages/metro/src/shared/output/RamBundle/buildSourcemapWithMetadata.js b/packages/metro/src/shared/output/RamBundle/buildSourcemapWithMetadata.js
index a5b9aa130f..feee279c58 100644
--- a/packages/metro/src/shared/output/RamBundle/buildSourcemapWithMetadata.js
+++ b/packages/metro/src/shared/output/RamBundle/buildSourcemapWithMetadata.js
@@ -9,16 +9,14 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {ModuleGroups, ModuleTransportLike} from '../../types';
 import type {IndexMap} from 'metro-source-map';
 
-const {
+import {
   combineSourceMaps,
   combineSourceMapsAddingOffsets,
   joinModules,
-} = require('./util');
+} from './util';
 
 type Params = {
   fixWrapperOffset: boolean,
@@ -27,7 +25,7 @@ type Params = {
   startupModules: $ReadOnlyArray<ModuleTransportLike>,
 };
 
-module.exports = (({
+export default (({
   fixWrapperOffset,
   lazyModules,
   moduleGroups,
diff --git a/packages/metro/src/shared/output/RamBundle/magic-number.js b/packages/metro/src/shared/output/RamBundle/magic-number.js
index c19a9dadd2..ec1322f739 100644
--- a/packages/metro/src/shared/output/RamBundle/magic-number.js
+++ b/packages/metro/src/shared/output/RamBundle/magic-number.js
@@ -9,6 +9,4 @@
  * @oncall react_native
  */
 
-'use strict';
-
-module.exports = 0xfb0bd1e5;
+export default 0xfb0bd1e5;
diff --git a/packages/metro/src/shared/output/RamBundle/util.js b/packages/metro/src/shared/output/RamBundle/util.js
index ff71b6869d..5a0d821b06 100644
--- a/packages/metro/src/shared/output/RamBundle/util.js
+++ b/packages/metro/src/shared/output/RamBundle/util.js
@@ -9,8 +9,6 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {ModuleGroups, ModuleTransportLike} from '../../types';
 import type {
   BasicSourceMap,
@@ -20,8 +18,7 @@ import type {
 } from 'metro-source-map';
 
 import countLines from '../../../lib/countLines';
-
-const invariant = require('invariant');
+import invariant from 'invariant';
 
 function lineToLineSourceMap(
   source: string,
@@ -140,7 +137,7 @@ function combineMaps(
 const joinModules = (modules: $ReadOnlyArray<{+code: string, ...}>): string =>
   modules.map((m: {+code: string, ...}) => m.code).join('\n');
 
-module.exports = {
+export {
   combineSourceMaps,
   combineSourceMapsAddingOffsets,
   countLines,
diff --git a/packages/metro/src/shared/output/RamBundle/write-sourcemap.js b/packages/metro/src/shared/output/RamBundle/write-sourcemap.js
index 2d6604f9bd..168905a0ca 100644
--- a/packages/metro/src/shared/output/RamBundle/write-sourcemap.js
+++ b/packages/metro/src/shared/output/RamBundle/write-sourcemap.js
@@ -9,11 +9,9 @@
  * @oncall react_native
  */
 
-'use strict';
+import writeFile from '../writeFile';
 
-const writeFile = require('../writeFile');
-
-function writeSourcemap(
+export default function writeSourcemap(
   fileName: string,
   contents: string,
   log: (...args: Array<string>) => void,
@@ -27,5 +25,3 @@ function writeSourcemap(
   writeMap.then(() => log('Done writing sourcemap output'));
   return writeMap;
 }
-
-module.exports = writeSourcemap;
diff --git a/packages/metro/src/shared/output/__tests__/meta-test.js b/packages/metro/src/shared/output/__tests__/meta-test.js
index 48f09e16ba..b301c4a176 100644
--- a/packages/metro/src/shared/output/__tests__/meta-test.js
+++ b/packages/metro/src/shared/output/__tests__/meta-test.js
@@ -11,7 +11,7 @@
 
 'use strict';
 
-const meta = require('../meta');
+import meta from '../meta';
 
 test('exports the block list creator', () => {
   expect(meta('some formatted code', 'utf8')).toMatchSnapshot();
diff --git a/packages/metro/src/shared/output/bundle.flow.js b/packages/metro/src/shared/output/bundle.flow.js
index a9f77a8e30..00d4629dea 100644
--- a/packages/metro/src/shared/output/bundle.flow.js
+++ b/packages/metro/src/shared/output/bundle.flow.js
@@ -9,17 +9,15 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {AssetData} from '../../Assets';
 import type {BuildOptions, OutputOptions, RequestOptions} from '../types';
 import type {MixedSourceMap} from 'metro-source-map';
 
-const relativizeSourceMapInline = require('../../lib/relativizeSourceMap');
-const Server = require('../../Server');
-const writeFile = require('./writeFile');
+import relativizeSourceMapInline from '../../lib/relativizeSourceMap';
+import Server from '../../Server';
+import writeFile from './writeFile';
 
-function buildBundle(
+export function build(
   packagerClient: Server,
   requestOptions: RequestOptions,
   buildOptions?: BuildOptions = {},
@@ -47,7 +45,7 @@ function relativateSerializedMap(
   return JSON.stringify(sourceMap);
 }
 
-async function saveBundleAndMap(
+export async function save(
   bundle: {
     code: string,
     map: string,
@@ -90,6 +88,4 @@ async function saveBundleAndMap(
   await Promise.all(writeFns.map((cb: void => mixed) => cb()));
 }
 
-exports.build = buildBundle;
-exports.save = saveBundleAndMap;
-exports.formatName = 'bundle';
+export const formatName = 'bundle';
diff --git a/packages/metro/src/shared/output/bundle.js b/packages/metro/src/shared/output/bundle.js
index fd214f16cb..b4c2accf7d 100644
--- a/packages/metro/src/shared/output/bundle.js
+++ b/packages/metro/src/shared/output/bundle.js
@@ -9,6 +9,8 @@
  * @oncall react_native
  */
 
+/* eslint-disable import/no-commonjs */
+
 'use strict';
 
 /*::
diff --git a/packages/metro/src/shared/output/meta.js b/packages/metro/src/shared/output/meta.js
index a1dfa5f866..d30c3b01cf 100644
--- a/packages/metro/src/shared/output/meta.js
+++ b/packages/metro/src/shared/output/meta.js
@@ -9,9 +9,7 @@
  * @oncall react_native
  */
 
-'use strict';
-
-const crypto = require('crypto');
+import crypto from 'crypto';
 
 const isUTF8 = (encoding: 'ascii' | 'utf16le' | 'utf8') =>
   /^utf-?8$/i.test(encoding);
@@ -25,7 +23,7 @@ const constantFor = (encoding: 'ascii' | 'utf16le' | 'utf8') =>
         ? 3
         : 0;
 
-module.exports = function (
+export default function (
   code: Buffer | string,
   encoding: 'ascii' | 'utf16le' | 'utf8' = 'utf8',
 ): Buffer {
@@ -40,7 +38,7 @@ module.exports = function (
     signature.length - 1,
   );
   return signature;
-};
+}
 
 function tryAsciiPromotion(
   buffer: Buffer,
diff --git a/packages/metro/src/shared/output/unbundle.js b/packages/metro/src/shared/output/unbundle.js
index 18a5a74078..1eb2bc1e97 100644
--- a/packages/metro/src/shared/output/unbundle.js
+++ b/packages/metro/src/shared/output/unbundle.js
@@ -9,8 +9,6 @@
  * @oncall react_native
  */
 
-'use strict';
-
 /* This is for retro-compatibility of React Native with older versions of
  * Metro. Use the `RamBundle` module directly. */
-module.exports = require('./RamBundle');
+export * from './RamBundle';
diff --git a/packages/metro/src/shared/output/writeFile.js b/packages/metro/src/shared/output/writeFile.js
index 7b5ca7343c..5191710faa 100644
--- a/packages/metro/src/shared/output/writeFile.js
+++ b/packages/metro/src/shared/output/writeFile.js
@@ -9,14 +9,12 @@
  * @oncall react_native
  */
 
-'use strict';
-
-const fs = require('fs');
-const throat = require('throat');
+import fs from 'fs';
+import throat from 'throat';
 
 const writeFile: typeof fs.promises.writeFile = throat(
   128,
   fs.promises.writeFile,
 );
 
-module.exports = writeFile;
+export default writeFile;
diff --git a/packages/metro/src/shared/types.js b/packages/metro/src/shared/types.js
index fc798abdcf..24b6eea36e 100644
--- a/packages/metro/src/shared/types.js
+++ b/packages/metro/src/shared/types.js
@@ -9,8 +9,6 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {
   Options as DeltaBundlerOptions,
   TransformInputOptions,
diff --git a/packages/ob1/src/__flowtests__/ob1-flowtest.js b/packages/ob1/src/__flowtests__/ob1-flowtest.js
index d7e43241fa..054d0ad20a 100644
--- a/packages/ob1/src/__flowtests__/ob1-flowtest.js
+++ b/packages/ob1/src/__flowtests__/ob1-flowtest.js
@@ -9,16 +9,14 @@
  * @oncall react_native
  */
 
-'use strict';
-
 import type {Number0, Number1} from '../ob1';
 
-const {add, add0, add1, get0, get1, inc, neg, sub, sub1} = require('../ob1');
+import {add, add0, add1, get0, get1, inc, neg, sub, sub1} from '../ob1';
 
 const FORTY_TWO_0 = add0(42);
 const FORTY_TWO_1 = add1(42);
 
-module.exports = {
+export default {
   testSafeOps() {
     (add(FORTY_TWO_0, FORTY_TWO_0): Number0);
     (add(FORTY_TWO_0, FORTY_TWO_1): Number1);
diff --git a/packages/ob1/src/ob1.js b/packages/ob1/src/ob1.js
index e24c7a1747..84acc842d5 100644
--- a/packages/ob1/src/ob1.js
+++ b/packages/ob1/src/ob1.js
@@ -9,8 +9,6 @@
  * @oncall react_native
  */
 
-'use strict';
-
 /* eslint-disable no-redeclare */
 
 // A type representing 0-based offsets.
@@ -27,7 +25,7 @@ declare function add(a: Number1, b: Number0): Number1;
 declare function add(a: Number0, b: Number1): Number1;
 declare function add(a: Number0, b: Number0): Number0;
 
-function add(a: number, b: number): number {
+export function add(a: number, b: number): number {
   return a + b;
 }
 
@@ -40,41 +38,41 @@ declare function sub(a: Number1, b: Number0): Number1;
 declare function sub(a: Number0, b: Number0): Number0;
 declare function sub(a: Number1, b: Number1): Number0;
 
-function sub(a: number, b: number): number {
+export function sub(a: number, b: number): number {
   return a - b;
 }
 
 // Get the underlying number of a 0-based offset, casting away the opaque type.
 declare function get0(x: Number0): number;
 declare function get0(x: void | null): void | null;
-function get0(x: number): number {
+export function get0(x: number): number {
   return x;
 }
 
 // Get the underlying number of a 1-based offset, casting away the opaque type.
 declare function get1(x: Number1): number;
 declare function get1(x: void | null): void | null;
-function get1(x: number): number {
+export function get1(x: number): number {
   return x;
 }
 
 // Add 1 to a 0-based offset, thus converting it to 1-based.
-function add1(x: Number0 | number): Number1 {
+export function add1(x: Number0 | number): Number1 {
   return x + 1;
 }
 
 // Subtract 1 from a 1-based offset, thus converting it to 0-based.
-function sub1(x: Number1): Number0 {
+export function sub1(x: Number1): Number0 {
   return x - 1;
 }
 
 // Negate a 0-based offset.
-function neg(x: Number0): Number0 {
+export function neg(x: Number0): Number0 {
   return -x;
 }
 
 // Cast a number to a 0-based offset.
-function add0(x: number): Number0 {
+export function add0(x: number): Number0 {
   return x;
 }
 
@@ -83,8 +81,6 @@ declare function inc(a: Number0): Number0;
 // Increment a 1-based offset.
 declare function inc(a: Number1): Number1;
 
-function inc(x: number): number {
+export function inc(x: number): number {
   return x + 1;
 }
-
-module.exports = {add, get0, get1, add1, sub1, sub, neg, add0, inc};
diff --git a/scripts/__tests__/subpackages-test.js b/scripts/__tests__/subpackages-test.js
index e9a3e1f903..68445701d2 100644
--- a/scripts/__tests__/subpackages-test.js
+++ b/scripts/__tests__/subpackages-test.js
@@ -152,6 +152,8 @@ describe.each([...ALL_PACKAGES])('%s', packagePath => {
       const endOfHeader = content.indexOf('*/\n') + 3;
       expect(endOfHeader).toBeGreaterThan(3);
       expect(content.slice(endOfHeader)).toEqual(`
+/* eslint-disable import/no-commonjs */
+
 'use strict';
 
 /*::