.eslintrc.json

{
  "root": true,
  "extends": [
    "plugin:import/errors",
    "plugin:import/warnings",
    "plugin:unicorn/recommended",
    "xo",
    "xo/browser"
  ],
  "rules": {
    "arrow-body-style": "off",
    "capitalized-comments": "off",
    "comma-dangle": [
      "error",
      "never"
    ],
    "import/extensions": [
      "error",
      "ignorePackages",
      {
        "js": "always"
      }
    ],
    "import/first": "error",
    "import/newline-after-import": "error",
    "import/no-absolute-path": "error",
    "import/no-amd": "error",
    "import/no-cycle": [
      "error",
      {
        "ignoreExternal": true
      }
    ],
    "import/no-duplicates": "error",
    "import/no-extraneous-dependencies": "error",
    "import/no-mutable-exports": "error",
    "import/no-named-as-default": "error",
    "import/no-named-as-default-member": "error",
    "import/no-named-default": "error",
    "import/no-self-import": "error",
    "import/no-unassigned-import": [
      "error"
    ],
    "import/no-useless-path-segments": "error",
    "import/order": "error",
    "indent": [
      "error",
      2,
      {
        "MemberExpression": "off",
        "SwitchCase": 1
      }
    ],
    "logical-assignment-operators": "off",
    "max-params": [
      "warn",
      5
    ],
    "multiline-ternary": [
      "error",
      "always-multiline"
    ],
    "new-cap": [
      "error",
      {
        "properties": false
      }
    ],
    "no-console": "error",
    "no-negated-condition": "off",
    "object-curly-spacing": [
      "error",
      "always"
    ],
    "operator-linebreak": [
      "error",
      "after"
    ],
    "prefer-object-has-own": "off",
    "prefer-template": "error",
    "semi": [
      "error",
      "never"
    ],
    "strict": "error",
    "unicorn/explicit-length-check": "off",
    "unicorn/filename-case": "off",
    "unicorn/no-array-callback-reference": "off",
    "unicorn/no-array-method-this-argument": "off",
    "unicorn/no-null": "off",
    "unicorn/no-typeof-undefined": "off",
    "unicorn/no-unused-properties": "error",
    "unicorn/numeric-separators-style": "off",
    "unicorn/prefer-array-flat": "off",
    "unicorn/prefer-at": "off",
    "unicorn/prefer-dom-node-dataset": "off",
    "unicorn/prefer-module": "off",
    "unicorn/prefer-query-selector": "off",
    "unicorn/prefer-spread": "off",
    "unicorn/prefer-string-replace-all": "off",
    "unicorn/prevent-abbreviations": "off"
  },
  "overrides": [
    {
      "files": [
        "build/**"
      ],
      "env": {
        "browser": false,
        "node": true
      },
      "parserOptions": {
        "sourceType": "module"
      },
      "rules": {
        "no-console": "off",
        "unicorn/prefer-top-level-await": "off"
      }
    },
    {
      "files": [
        "js/**"
      ],
      "parserOptions": {
        "sourceType": "module"
      }
    },
    {
      "files": [
        "js/tests/*.js",
        "js/tests/integration/rollup*.js"
      ],
      "env": {
        "node": true
      },
      "parserOptions": {
        "sourceType": "script"
      }
    },
    {
      "files": [
        "js/tests/unit/**"
      ],
      "env": {
        "jasmine": true
      },
      "rules": {
        "no-console": "off",
        "unicorn/consistent-function-scoping": "off",
        "unicorn/no-useless-undefined": "off",
        "unicorn/prefer-add-event-listener": "off"
      }
    },
    {
      "files": [
        "js/tests/visual/**"
      ],
      "plugins": [
        "html"
      ],
      "settings": {
        "html/html-extensions": [
          ".html"
        ]
      },
      "rules": {
        "no-console": "off",
        "no-new": "off",
        "unicorn/no-array-for-each": "off"
      }
    },
    {
      "files": [
        "scss/tests/**"
      ],
      "env": {
        "node": true
      },
      "parserOptions": {
        "sourceType": "script"
      }
    },
    {
      "files": [
        "site/**"
      ],
      "env": {
        "browser": true,
        "node": false
      },
      "parserOptions": {
        "sourceType": "script",
        "ecmaVersion": 2019
      },
      "rules": {
        "no-new": "off",
        "unicorn/no-array-for-each": "off"
      }
    },
    {
      "files": [
        "**/*.md"
      ],
      "plugins": [
        "markdown"
      ],
      "processor": "markdown/markdown"
    },
    {
      "files": [
        "**/*.md/*.js"
      ],
      "extends": "plugin:markdown/recommended",
      "parserOptions": {
        "sourceType": "module"
      },
      "rules": {
        "unicorn/prefer-node-protocol": "off"
      }
    }
  ]
}