Don't compress helpers

packages/babel-helpers/scripts/generate-helpers.js

@@ -46,8 +46,9 @@ export default Object.freeze({
     const { minVersion } = minVersionMatch.groups;
 
     const source = await minify(fileContents, {
-      compress: false,
       mangle: false,
+      // The _typeof helper has a custom directive that we must keep
+      compress: { directives: false },
     });
 
     output += `\

packages/babel-helpers/src/helpers-generated.ts

@@ -15,22 +15,22 @@ function helper(minVersion, source) {
 export default Object.freeze({
   asyncIterator: helper(
     "7.15.9",
-    'export default function _asyncIterator(iterable){var method,async,sync,retry=2;if(typeof Symbol!=="undefined"){async=Symbol.asyncIterator;sync=Symbol.iterator}while(retry--){if(async&&(method=iterable[async])!=null){return method.call(iterable)}if(sync&&(method=iterable[sync])!=null){return new AsyncFromSyncIterator(method.call(iterable))}async="@@asyncIterator";sync="@@iterator"}throw new TypeError("Object is not async iterable")}function AsyncFromSyncIterator(s){AsyncFromSyncIterator=function(s){this.s=s;this.n=s.next};AsyncFromSyncIterator.prototype={s:null,n:null,next:function(){return AsyncFromSyncIteratorContinuation(this.n.apply(this.s,arguments))},return:function(value){var ret=this.s.return;if(ret===undefined){return Promise.resolve({value:value,done:true})}return AsyncFromSyncIteratorContinuation(ret.apply(this.s,arguments))},throw:function(value){var thr=this.s.return;if(thr===undefined)return Promise.reject(value);return AsyncFromSyncIteratorContinuation(thr.apply(this.s,arguments))}};function AsyncFromSyncIteratorContinuation(r){if(Object(r)!==r){return Promise.reject(new TypeError(r+" is not an object."))}var done=r.done;return Promise.resolve(r.value).then((function(value){return{value:value,done:done}}))}return new AsyncFromSyncIterator(s)}',
+    'export default function _asyncIterator(iterable){var method,async,sync,retry=2;for("undefined"!=typeof Symbol&&(async=Symbol.asyncIterator,sync=Symbol.iterator);retry--;){if(async&&null!=(method=iterable[async]))return method.call(iterable);if(sync&&null!=(method=iterable[sync]))return new AsyncFromSyncIterator(method.call(iterable));async="@@asyncIterator",sync="@@iterator"}throw new TypeError("Object is not async iterable")}function AsyncFromSyncIterator(s){function AsyncFromSyncIteratorContinuation(r){if(Object(r)!==r)return Promise.reject(new TypeError(r+" is not an object."));var done=r.done;return Promise.resolve(r.value).then((function(value){return{value:value,done:done}}))}return AsyncFromSyncIterator=function(s){this.s=s,this.n=s.next},AsyncFromSyncIterator.prototype={s:null,n:null,next:function(){return AsyncFromSyncIteratorContinuation(this.n.apply(this.s,arguments))},return:function(value){var ret=this.s.return;return void 0===ret?Promise.resolve({value:value,done:!0}):AsyncFromSyncIteratorContinuation(ret.apply(this.s,arguments))},throw:function(value){var thr=this.s.return;return void 0===thr?Promise.reject(value):AsyncFromSyncIteratorContinuation(thr.apply(this.s,arguments))}},new AsyncFromSyncIterator(s)}',
   ),
   jsx: helper(
     "7.0.0-beta.0",
-    'var REACT_ELEMENT_TYPE;export default function _createRawReactElement(type,props,key,children){if(!REACT_ELEMENT_TYPE){REACT_ELEMENT_TYPE=typeof Symbol==="function"&&Symbol["for"]&&Symbol["for"]("react.element")||60103}var defaultProps=type&&type.defaultProps;var childrenLength=arguments.length-3;if(!props&&childrenLength!==0){props={children:void 0}}if(childrenLength===1){props.children=children}else if(childrenLength>1){var childArray=new Array(childrenLength);for(var i=0;i<childrenLength;i++){childArray[i]=arguments[i+3]}props.children=childArray}if(props&&defaultProps){for(var propName in defaultProps){if(props[propName]===void 0){props[propName]=defaultProps[propName]}}}else if(!props){props=defaultProps||{}}return{$$typeof:REACT_ELEMENT_TYPE,type:type,key:key===undefined?null:""+key,ref:null,props:props,_owner:null}}',
+    'var REACT_ELEMENT_TYPE;export default function _createRawReactElement(type,props,key,children){REACT_ELEMENT_TYPE||(REACT_ELEMENT_TYPE="function"==typeof Symbol&&Symbol.for&&Symbol.for("react.element")||60103);var defaultProps=type&&type.defaultProps,childrenLength=arguments.length-3;if(props||0===childrenLength||(props={children:void 0}),1===childrenLength)props.children=children;else if(childrenLength>1){for(var childArray=new Array(childrenLength),i=0;i<childrenLength;i++)childArray[i]=arguments[i+3];props.children=childArray}if(props&&defaultProps)for(var propName in defaultProps)void 0===props[propName]&&(props[propName]=defaultProps[propName]);else props||(props=defaultProps||{});return{$$typeof:REACT_ELEMENT_TYPE,type:type,key:void 0===key?null:""+key,ref:null,props:props,_owner:null}}',
   ),
   objectSpread2: helper(
     "7.5.0",
-    'import defineProperty from"defineProperty";function ownKeys(object,enumerableOnly){var keys=Object.keys(object);if(Object.getOwnPropertySymbols){var symbols=Object.getOwnPropertySymbols(object);if(enumerableOnly){symbols=symbols.filter((function(sym){return Object.getOwnPropertyDescriptor(object,sym).enumerable}))}keys.push.apply(keys,symbols)}return keys}export default function _objectSpread2(target){for(var i=1;i<arguments.length;i++){var source=arguments[i]!=null?arguments[i]:{};if(i%2){ownKeys(Object(source),true).forEach((function(key){defineProperty(target,key,source[key])}))}else if(Object.getOwnPropertyDescriptors){Object.defineProperties(target,Object.getOwnPropertyDescriptors(source))}else{ownKeys(Object(source)).forEach((function(key){Object.defineProperty(target,key,Object.getOwnPropertyDescriptor(source,key))}))}}return target}',
+    'import defineProperty from"defineProperty";function ownKeys(object,enumerableOnly){var keys=Object.keys(object);if(Object.getOwnPropertySymbols){var symbols=Object.getOwnPropertySymbols(object);enumerableOnly&&(symbols=symbols.filter((function(sym){return Object.getOwnPropertyDescriptor(object,sym).enumerable}))),keys.push.apply(keys,symbols)}return keys}export default function _objectSpread2(target){for(var i=1;i<arguments.length;i++){var source=null!=arguments[i]?arguments[i]:{};i%2?ownKeys(Object(source),!0).forEach((function(key){defineProperty(target,key,source[key])})):Object.getOwnPropertyDescriptors?Object.defineProperties(target,Object.getOwnPropertyDescriptors(source)):ownKeys(Object(source)).forEach((function(key){Object.defineProperty(target,key,Object.getOwnPropertyDescriptor(source,key))}))}return target}',
   ),
   typeof: helper(
     "7.0.0-beta.0",
-    'export default function _typeof(obj){"@babel/helpers - typeof";if(typeof Symbol==="function"&&typeof Symbol.iterator==="symbol"){_typeof=function(obj){return typeof obj}}else{_typeof=function(obj){return obj&&typeof Symbol==="function"&&obj.constructor===Symbol&&obj!==Symbol.prototype?"symbol":typeof obj}}return _typeof(obj)}',
+    'export default function _typeof(obj){"@babel/helpers - typeof";return _typeof="function"==typeof Symbol&&"symbol"==typeof Symbol.iterator?function(obj){return typeof obj}:function(obj){return obj&&"function"==typeof Symbol&&obj.constructor===Symbol&&obj!==Symbol.prototype?"symbol":typeof obj},_typeof(obj)}',
   ),
   wrapRegExp: helper(
     "7.2.6",
-    'import setPrototypeOf from"setPrototypeOf";import inherits from"inherits";export default function _wrapRegExp(){_wrapRegExp=function(re,groups){return new BabelRegExp(re,undefined,groups)};var _super=RegExp.prototype;var _groups=new WeakMap;function BabelRegExp(re,flags,groups){var _this=new RegExp(re,flags);_groups.set(_this,groups||_groups.get(re));return setPrototypeOf(_this,BabelRegExp.prototype)}inherits(BabelRegExp,RegExp);BabelRegExp.prototype.exec=function(str){var result=_super.exec.call(this,str);if(result)result.groups=buildGroups(result,this);return result};BabelRegExp.prototype[Symbol.replace]=function(str,substitution){if(typeof substitution==="string"){var groups=_groups.get(this);return _super[Symbol.replace].call(this,str,substitution.replace(/\\$<([^>]+)>/g,(function(_,name){return"$"+groups[name]})))}else if(typeof substitution==="function"){var _this=this;return _super[Symbol.replace].call(this,str,(function(){var args=arguments;if(typeof args[args.length-1]!=="object"){args=[].slice.call(args);args.push(buildGroups(args,_this))}return substitution.apply(this,args)}))}else{return _super[Symbol.replace].call(this,str,substitution)}};function buildGroups(result,re){var g=_groups.get(re);return Object.keys(g).reduce((function(groups,name){groups[name]=result[g[name]];return groups}),Object.create(null))}return _wrapRegExp.apply(this,arguments)}',
+    'import setPrototypeOf from"setPrototypeOf";import inherits from"inherits";export default function _wrapRegExp(){_wrapRegExp=function(re,groups){return new BabelRegExp(re,void 0,groups)};var _super=RegExp.prototype,_groups=new WeakMap;function BabelRegExp(re,flags,groups){var _this=new RegExp(re,flags);return _groups.set(_this,groups||_groups.get(re)),setPrototypeOf(_this,BabelRegExp.prototype)}function buildGroups(result,re){var g=_groups.get(re);return Object.keys(g).reduce((function(groups,name){return groups[name]=result[g[name]],groups}),Object.create(null))}return inherits(BabelRegExp,RegExp),BabelRegExp.prototype.exec=function(str){var result=_super.exec.call(this,str);return result&&(result.groups=buildGroups(result,this)),result},BabelRegExp.prototype[Symbol.replace]=function(str,substitution){if("string"==typeof substitution){var groups=_groups.get(this);return _super[Symbol.replace].call(this,str,substitution.replace(/\\$<([^>]+)>/g,(function(_,name){return"$"+groups[name]})))}if("function"==typeof substitution){var _this=this;return _super[Symbol.replace].call(this,str,(function(){var args=arguments;return"object"!=typeof args[args.length-1]&&(args=[].slice.call(args)).push(buildGroups(args,_this)),substitution.apply(this,args)}))}return _super[Symbol.replace].call(this,str,substitution)},_wrapRegExp.apply(this,arguments)}',
   ),
 });

packages/babel-plugin-transform-runtime/scripts/build-dist.js

@@ -302,14 +302,24 @@ function buildRuntimeRewritePlugin(runtimeName, helperName) {
 }
 
 function addDefaultCJSExport({ template }) {
+  const transformed = new WeakSet();
+
   return {
     visitor: {
       AssignmentExpression: {
         exit(path) {
           if (path.get("left").matchesPattern("module.exports")) {
-            path.insertAfter(template.expression.ast`
-              module.exports.default = module.exports,
-              module.exports.__esModule = true
+            if (transformed.has(path.node)) return;
+            transformed.add(path.node);
+
+            // Ensure that the completion value is still `module.exports`.
+            // This would be guaranteed by `insertAfter`, but by using `replaceWith`
+            // we can do it by putting `module.exports` last so that we don't need
+            // to inject temporary variables.
+            path.replaceWith(template.expression.ast`
+              ${path.node},
+              module.exports.__esModule = true,
+              module.exports.default = module.exports
             `);
           }
         },

packages/babel-runtime-corejs2/helpers/iterableToArray.js

@@ -8,5 +8,4 @@ function _iterableToArray(iter) {
   if (typeof _Symbol !== "undefined" && iter[_Symbol$iterator] != null || iter["@@iterator"] != null) return _Array$from(iter);
 }
 
-module.exports = _iterableToArray;
-module.exports["default"] = module.exports, module.exports.__esModule = true;
+module.exports = _iterableToArray, module.exports.__esModule = true, module.exports["default"] = module.exports;

packages/babel-runtime-corejs2/helpers/temporalRef.js

@@ -6,5 +6,4 @@ function _temporalRef(val, name) {
   return val === temporalUndefined ? tdz(name) : val;
 }
 
-module.exports = _temporalRef;
-module.exports["default"] = module.exports, module.exports.__esModule = true;
+module.exports = _temporalRef, module.exports.__esModule = true, module.exports["default"] = module.exports;

packages/babel-runtime-corejs2/helpers/toArray.js

@@ -10,5 +10,4 @@ function _toArray(arr) {
   return arrayWithHoles(arr) || iterableToArray(arr) || unsupportedIterableToArray(arr) || nonIterableRest();
 }
 
-module.exports = _toArray;
-module.exports["default"] = module.exports, module.exports.__esModule = true;
+module.exports = _toArray, module.exports.__esModule = true, module.exports["default"] = module.exports;

packages/babel-runtime-corejs2/helpers/typeof.js

@@ -5,22 +5,11 @@ var _Symbol$iterator = require("@babel/runtime-corejs2/core-js/symbol/iterator")
 function _typeof(obj) {
   "@babel/helpers - typeof";
 
-  if (typeof _Symbol === "function" && typeof _Symbol$iterator === "symbol") {
-    module.exports = _typeof = function _typeof(obj) {
-      return typeof obj;
-    };
-
-    module.exports["default"] = module.exports, module.exports.__esModule = true;
-  } else {
-    module.exports = _typeof = function _typeof(obj) {
-      return obj && typeof _Symbol === "function" && obj.constructor === _Symbol && obj !== _Symbol.prototype ? "symbol" : typeof obj;
-    };
-
-    module.exports["default"] = module.exports, module.exports.__esModule = true;
-  }
-
-  return _typeof(obj);
+  return (module.exports = _typeof = "function" == typeof _Symbol && "symbol" == typeof _Symbol$iterator ? function (obj) {
+    return typeof obj;
+  } : function (obj) {
+    return obj && "function" == typeof _Symbol && obj.constructor === _Symbol && obj !== _Symbol.prototype ? "symbol" : typeof obj;
+  }, module.exports.__esModule = true, module.exports["default"] = module.exports), _typeof(obj);
 }
 
-module.exports = _typeof;
-module.exports["default"] = module.exports, module.exports.__esModule = true;
+module.exports = _typeof, module.exports.__esModule = true, module.exports["default"] = module.exports;

packages/babel-runtime/helpers/iterableToArray.js

@@ -2,5 +2,4 @@ function _iterableToArray(iter) {
   if (typeof Symbol !== "undefined" && iter[Symbol.iterator] != null || iter["@@iterator"] != null) return Array.from(iter);
 }
 
-module.exports = _iterableToArray;
-module.exports["default"] = module.exports, module.exports.__esModule = true;
+module.exports = _iterableToArray, module.exports.__esModule = true, module.exports["default"] = module.exports;

packages/babel-runtime/helpers/temporalRef.js

@@ -6,5 +6,4 @@ function _temporalRef(val, name) {
   return val === temporalUndefined ? tdz(name) : val;
 }
 
-module.exports = _temporalRef;
-module.exports["default"] = module.exports, module.exports.__esModule = true;
+module.exports = _temporalRef, module.exports.__esModule = true, module.exports["default"] = module.exports;

packages/babel-runtime/helpers/toArray.js

@@ -10,5 +10,4 @@ function _toArray(arr) {
   return arrayWithHoles(arr) || iterableToArray(arr) || unsupportedIterableToArray(arr) || nonIterableRest();
 }
 
-module.exports = _toArray;
-module.exports["default"] = module.exports, module.exports.__esModule = true;
+module.exports = _toArray, module.exports.__esModule = true, module.exports["default"] = module.exports;

packages/babel-runtime/helpers/typeof.js

@@ -1,22 +1,11 @@
 function _typeof(obj) {
   "@babel/helpers - typeof";
 
-  if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") {
-    module.exports = _typeof = function _typeof(obj) {
-      return typeof obj;
-    };
-
-    module.exports["default"] = module.exports, module.exports.__esModule = true;
-  } else {
-    module.exports = _typeof = function _typeof(obj) {
-      return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj;
-    };
-
-    module.exports["default"] = module.exports, module.exports.__esModule = true;
-  }
-
-  return _typeof(obj);
+  return (module.exports = _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function (obj) {
+    return typeof obj;
+  } : function (obj) {
+    return obj && "function" == typeof Symbol && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj;
+  }, module.exports.__esModule = true, module.exports["default"] = module.exports), _typeof(obj);
 }
 
-module.exports = _typeof;
-module.exports["default"] = module.exports, module.exports.__esModule = true;
+module.exports = _typeof, module.exports.__esModule = true, module.exports["default"] = module.exports;