fix: remove unsupported bound styles from Builder generator to avoid crashes

.changeset/khaki-eggs-suffer.md

@@ -0,0 +1,5 @@
+---
+'@builder.io/mitosis': patch
+---
+
+Builder: unsupported bound styles are removed to avoid crashes

packages/core/src/__tests__/builder.test.ts

@@ -831,6 +831,49 @@ describe('Builder', () => {
         `);
   });
 
+  test('drop unsupported bound styles to avoid crashes', () => {
+    const jsx = `export default function MyComponent(props) {
+      return (
+        <div
+          style={{
+            fontSize: state.fontSize,
+            '&:hover': {
+              backgroundColor: state.foo === 1 ? "red" : "blue"
+            }
+          }}
+        />
+      );
+    }`;
+
+    const mitosis = parseJsx(jsx);
+
+    const json = componentToBuilder()({ component: mitosis });
+    expect(json).toMatchInlineSnapshot(`
+      {
+        "data": {
+          "blocks": [
+            {
+              "@type": "@builder.io/sdk:Element",
+              "actions": {},
+              "bindings": {
+                "style.fontSize": "state.fontSize",
+              },
+              "children": [],
+              "code": {
+                "actions": {},
+                "bindings": {},
+              },
+              "properties": {},
+              "tagName": "div",
+            },
+          ],
+          "jsCode": "",
+          "tsCode": "",
+        },
+      }
+    `);
+  });
+
   test('map custom component bindings', () => {
     const content = {
       data: {

packages/core/src/generators/builder/generator.ts

@@ -468,17 +468,40 @@ const mapBoundStyles = (bindings: { [key: string]: Binding | undefined }) => {
         };
       }
     } else {
-      bindings[`style.${key}`] = {
-        code: parsed[key],
-        bindingType: 'expression',
-        type: 'single',
-      };
+      if (isGlobalStyle(key)) {
+        console.warn(
+          `The following bound styles are not supported by Builder JSON and have been removed:
+  "${key}": ${parsed[key]}
+          `,
+        );
+      } else {
+        bindings[`style.${key}`] = {
+          code: parsed[key],
+          bindingType: 'expression',
+          type: 'single',
+        };
+      }
     }
   }
 
   delete bindings['style'];
 };
 
+function isGlobalStyle(key: string) {
+  // These are mapped to their respective responsiveStyle and support bindings
+  if (/max-width: (.*?)px/gm.exec(key)) {
+    return false;
+  }
+
+  return (
+    // pseudo class
+    key.startsWith('&:') ||
+    key.startsWith(':') ||
+    // @ rules
+    key.startsWith('@')
+  );
+}
+
 export const blockToBuilder = (
   json: MitosisNode,
   options: ToBuilderOptions = {},