Remove plugin-transform-for-of from react-native-babel-preset (face…

…book#792) Summary: ## Summary As a follow-up to facebook#789 , this PR removes `babel/plugin-transform-for-of` from the preset for JavaScriptCore users. Pull Request resolved: facebook#792 Test Plan: All unit tests pass Reviewed By: motiz88 Differential Revision: D34927434 Pulled By: rh389 fbshipit-source-id: d38cd529c371ca0e13071f26c00d3a322ff5fab6
robhogan · Mar 17, 2022 · 381ae62 · 381ae62
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diff --git a/packages/metro-react-native-babel-preset/package.json b/packages/metro-react-native-babel-preset/package.json
@@ -38,7 +38,6 @@
     "@babel/plugin-transform-destructuring": "^7.0.0",
     "@babel/plugin-transform-exponentiation-operator": "^7.0.0",
     "@babel/plugin-transform-flow-strip-types": "^7.0.0",
-    "@babel/plugin-transform-for-of": "^7.0.0",
     "@babel/plugin-transform-function-name": "^7.0.0",
     "@babel/plugin-transform-literals": "^7.0.0",
     "@babel/plugin-transform-modules-commonjs": "^7.0.0",

diff --git a/packages/metro-react-native-babel-preset/src/configs/main.js b/packages/metro-react-native-babel-preset/src/configs/main.js
@@ -43,8 +43,6 @@ const getPreset = (src, options) => {
 
   const isNull = src == null;
   const hasClass = isNull || src.indexOf('class') !== -1;
-  const hasForOf =
-    isNull || (src.indexOf('for') !== -1 && src.indexOf('of') !== -1);
 
   const extraPlugins = [];
   if (!options.useTransformReactJSXExperimental) {
@@ -125,12 +123,6 @@ const getPreset = (src, options) => {
       require('@babel/plugin-transform-exponentiation-operator'),
     ]);
   }
-  if (!isHermes && hasForOf) {
-    extraPlugins.push([
-      require('@babel/plugin-transform-for-of'),
-      {loose: true},
-    ]);
-  }
   if (
     isNull ||
     src.indexOf('React.createClass') !== -1 ||