Update to core-js@3 (#7646)

### `@babel/runtime` - Added `@babel/runtime-corejs3` package and `corejs: 3` options to `@babel/plugin-transform-runtime`. - Added support of instance methods, fixes #8928. - Added flag `proposals` (in `corejs: { version: 3, proposals: true }` format) for support all proposals polyfills from `core-js`. - Used separate directories in runtime for `core-js` entry points with proposals and without. - Used `get-iterator-method` helper for getting iterators, fixes #2500. - As a cheap bonus, added support of IE8- (except some cases of `regenerator`). ### `@babel/polyfill` - Should be deprecated in favor of separate usage required features from `core-js` and `regenerator-runtime` with an informative message. ### `@babel/preset-env` - Uses for built-ins data from [`core-js-compat`](https://github.com/zloirock/core-js/tree/master/packages/core-js-compat) instead of `compat-table` since information from `compat-table` [is not enough](https://github.com/zloirock/core-js/tree/master/packages/core-js-compat). - `useBuilIns` now requires direct setting of `corejs` version option, without it will be used `2` by default and shown deprecation warning. - Added support of minor `core-js` versions for simplify updating in the future. - For preventing some order-related problems, polyfills in the both `core-js@3` plugins added on `post` stage in the order of `core-js-compat` data. - Divided plugins and polyfills parts of `preset-env`, instead of 2 internal plugins for adding polyfills, we have 6: usage and entry versions of plugins for `core-js@2`, ### Current state: `core-js@3`, `regenerator-runtime`. - Added support `samsung` target (for Samsung Internet) since `core-js-compat` and `compat-table` now contains mapping for this, fixes #6602. #### `useBuilIns: entry` with `corejs: 3` - No longer transforms `@babel/polyfill`. - Transforms **all possible** `core-js` entry points to import of related modules (based on data from [`core-js-compat`](https://unpkg.com/core-js-compat@3.0.0-beta.15/entries.json)). - Since of this, we no longer need `shippedProposals` / `proposals` flags with `useBuilIns: entry`. - Removes `regenerator-runtime/runtime` import where it's not required. #### `useBuilIns: usage` with `corejs: 3` - In addition to `shippedProposals`, added flag `proposals` (in `corejs: { version: 3, proposals: true }` format) for polyfill all proposals from `core-js`. - Fixed list of dependencies in built-in definitions. - Improved the way of determination method / built-in name and source of this method. - Adds import of required polyfills on `MemberExpression`, `ObjectPattern`, `in` operator. - Adds import of required polyfills on access to global object properties. - Adds import of all required common iterators on all syntax features which use iterators protocol (`for-of`, destructuring, spread, `yield` delegation, etc.). - Adds import of promises on syntax features which use promises (async functions/generators, dynamic import, etc.), fixes #9250, #7402, etc. ### `core-js@2` stuff I didn't want to tough `core-js@2`-related stuff, however - Fixed some serious errors in definitions which breaks `Object.getOwnPropertySymbols`, `Symbol.toStringTag` logic, `Promise#finally`, `Array#forEach`, etc. - `Array#flatMap` and trim methods moved to stable features as a part of ES2019 and loaded by deprecated `@babel/polyfill` and `@babel/preset-env` with `corejs: 2` option.
babel · Mar 19, 2019 · 3303b07 · 3303b07
1 parent 7df0d16
commit 3303b07
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diff --git a/.eslintignore b/.eslintignore
@@ -5,8 +5,8 @@ package.json
 lerna.json
 packages/babel-runtime
 !packages/babel-plugin-transform-runtime/scripts
-!packages/babel-runtime-corejs2/core-js.js
 packages/babel-runtime-corejs2
+packages/babel-runtime-corejs3
 packages/*/node_modules
 packages/*/lib
 packages/*/dist

diff --git a/.gitignore b/.gitignore
@@ -38,6 +38,11 @@ package-lock.json
 /packages/babel-runtime-corejs2/core-js/**/*.js
 !/packages/babel-runtime-corejs2/core-js/map.js
 
+/packages/babel-runtime-corejs3/helpers/*.js
+/packages/babel-runtime-corejs3/helpers/esm/*.js
+/packages/babel-runtime-corejs3/core-js/**/*.js
+/packages/babel-runtime-corejs3/core-js-stable/**/*.js
+
 /packages/babel-register/test/.babel
 /packages/babel-cli/test/tmp
 /packages/babel-node/test/tmp

diff --git a/lib/third-party-libs.js.flow b/lib/third-party-libs.js.flow
@@ -27,16 +27,31 @@ declare module "lodash/merge" {
 }
 
 declare module "semver" {
+  declare class SemVer {
+    build: Array<string>;
+    loose: ?boolean;
+    major: number;
+    minor: number;
+    patch: number;
+    prerelease: Array<string | number>;
+    raw: string;
+    version: string;
+
+    constructor(version: string | SemVer): SemVer;
+  }
+
   declare module.exports: {
-    valid(v: string): boolean;
+    SemVer: SemVer;
+
+    coerce(version: string | SemVer): SemVer | null;
     gt(v1: string, v2: string): boolean;
+    intersects(r1: string, r2: string): boolean;
     lt(v1: string, v2: string): boolean;
     major(v: string): number;
     minor(v: string): number;
     patch(v: string): number;
     satisfies(v1: string, r1: string): boolean;
-
-    intersects(r1: string, r2: string): boolean;
+    valid(v: string): boolean;
   }
 }
 
@@ -180,3 +195,13 @@ declare module "js-levenshtein" {
     (string, string): number,
   };
 }
+
+declare module "core-js-compat/data" {
+  declare type Target = "node" | "chrome" | "opera" | "edge" | "firefox" | "safari" | "ie" | "ios" | "android" | "electron" | "samsung";
+
+  declare module.exports: {
+    [key: string]: {
+      [target: Target]: string;
+    }
+  }
+}
diff --git a/packages/babel-helpers/src/helpers.js b/packages/babel-helpers/src/helpers.js
@@ -998,7 +998,7 @@ helpers.initializerDefineProperty = helper("7.0.0-beta.0")`
 helpers.applyDecoratedDescriptor = helper("7.0.0-beta.0")`
     export default function _applyDecoratedDescriptor(target, property, decorators, descriptor, context){
         var desc = {};
-        Object['ke' + 'ys'](descriptor).forEach(function(key){
+        Object.keys(descriptor).forEach(function(key){
             desc[key] = descriptor[key];
         });
         desc.enumerable = !!desc.enumerable;
@@ -1019,7 +1019,7 @@ helpers.applyDecoratedDescriptor = helper("7.0.0-beta.0")`
         if (desc.initializer === void 0){
             // This is a hack to avoid this being processed by 'transform-runtime'.
             // See issue #9.
-            Object['define' + 'Property'](target, property, desc);
+            Object.defineProperty(target, property, desc);
             desc = null;
         }
 

diff --git a/...n-proposal-class-properties/test/fixtures/static-property-tdz/decorator-interop/output.js b/...n-proposal-class-properties/test/fixtures/static-property-tdz/decorator-interop/output.js
@@ -8,7 +8,7 @@ function _defineProperties(target, props) { for (var i = 0; i < props.length; i+
 
 function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }
 
-function _applyDecoratedDescriptor(target, property, decorators, descriptor, context) { var desc = {}; Object['ke' + 'ys'](descriptor).forEach(function (key) { desc[key] = descriptor[key]; }); desc.enumerable = !!desc.enumerable; desc.configurable = !!desc.configurable; if ('value' in desc || desc.initializer) { desc.writable = true; } desc = decorators.slice().reverse().reduce(function (desc, decorator) { return decorator(target, property, desc) || desc; }, desc); if (context && desc.initializer !== void 0) { desc.value = desc.initializer ? desc.initializer.call(context) : void 0; desc.initializer = undefined; } if (desc.initializer === void 0) { Object['define' + 'Property'](target, property, desc); desc = null; } return desc; }
+function _applyDecoratedDescriptor(target, property, decorators, descriptor, context) { var desc = {}; Object.keys(descriptor).forEach(function (key) { desc[key] = descriptor[key]; }); desc.enumerable = !!desc.enumerable; desc.configurable = !!desc.configurable; if ('value' in desc || desc.initializer) { desc.writable = true; } desc = decorators.slice().reverse().reduce(function (desc, decorator) { return decorator(target, property, desc) || desc; }, desc); if (context && desc.initializer !== void 0) { desc.value = desc.initializer ? desc.initializer.call(context) : void 0; desc.initializer = undefined; } if (desc.initializer === void 0) { Object.defineProperty(target, property, desc); desc = null; } return desc; }
 
 function _initializerWarningHelper(descriptor, context) { throw new Error('Decorating class property failed. Please ensure that ' + 'proposal-class-properties is enabled and set to use loose mode. ' + 'To use proposal-class-properties in spec mode with decorators, wait for ' + 'the next major version of decorators in stage 2.'); }
 

diff --git a/...-proposal-decorators/test/fixtures/legacy-decl-to-expression/method-decorators/output.mjs b/...-proposal-decorators/test/fixtures/legacy-decl-to-expression/method-decorators/output.mjs
@@ -1,6 +1,6 @@
 var _class, _class2;
 
-function _applyDecoratedDescriptor(target, property, decorators, descriptor, context) { var desc = {}; Object['ke' + 'ys'](descriptor).forEach(function (key) { desc[key] = descriptor[key]; }); desc.enumerable = !!desc.enumerable; desc.configurable = !!desc.configurable; if ('value' in desc || desc.initializer) { desc.writable = true; } desc = decorators.slice().reverse().reduce(function (desc, decorator) { return decorator(target, property, desc) || desc; }, desc); if (context && desc.initializer !== void 0) { desc.value = desc.initializer ? desc.initializer.call(context) : void 0; desc.initializer = undefined; } if (desc.initializer === void 0) { Object['define' + 'Property'](target, property, desc); desc = null; } return desc; }
+function _applyDecoratedDescriptor(target, property, decorators, descriptor, context) { var desc = {}; Object.keys(descriptor).forEach(function (key) { desc[key] = descriptor[key]; }); desc.enumerable = !!desc.enumerable; desc.configurable = !!desc.configurable; if ('value' in desc || desc.initializer) { desc.writable = true; } desc = decorators.slice().reverse().reduce(function (desc, decorator) { return decorator(target, property, desc) || desc; }, desc); if (context && desc.initializer !== void 0) { desc.value = desc.initializer ? desc.initializer.call(context) : void 0; desc.initializer = undefined; } if (desc.initializer === void 0) { Object.defineProperty(target, property, desc); desc = null; } return desc; }
 
 let A = (_class2 = class A {
   foo() {}

diff --git a/packages/babel-plugin-proposal-decorators/test/fixtures/legacy-regression/8041/output.mjs b/packages/babel-plugin-proposal-decorators/test/fixtures/legacy-regression/8041/output.mjs
@@ -1,6 +1,6 @@
 var _class2;
 
-function _applyDecoratedDescriptor(target, property, decorators, descriptor, context) { var desc = {}; Object['ke' + 'ys'](descriptor).forEach(function (key) { desc[key] = descriptor[key]; }); desc.enumerable = !!desc.enumerable; desc.configurable = !!desc.configurable; if ('value' in desc || desc.initializer) { desc.writable = true; } desc = decorators.slice().reverse().reduce(function (desc, decorator) { return decorator(target, property, desc) || desc; }, desc); if (context && desc.initializer !== void 0) { desc.value = desc.initializer ? desc.initializer.call(context) : void 0; desc.initializer = undefined; } if (desc.initializer === void 0) { Object['define' + 'Property'](target, property, desc); desc = null; } return desc; }
+function _applyDecoratedDescriptor(target, property, decorators, descriptor, context) { var desc = {}; Object.keys(descriptor).forEach(function (key) { desc[key] = descriptor[key]; }); desc.enumerable = !!desc.enumerable; desc.configurable = !!desc.configurable; if ('value' in desc || desc.initializer) { desc.writable = true; } desc = decorators.slice().reverse().reduce(function (desc, decorator) { return decorator(target, property, desc) || desc; }, desc); if (context && desc.initializer !== void 0) { desc.value = desc.initializer ? desc.initializer.call(context) : void 0; desc.initializer = undefined; } if (desc.initializer === void 0) { Object.defineProperty(target, property, desc); desc = null; } return desc; }
 
 let _class = (_class2 = class {
   bar() {}

diff --git a/...es/babel-plugin-proposal-object-rest-spread/test/fixtures/regression/gh-7304/options.json b/...es/babel-plugin-proposal-object-rest-spread/test/fixtures/regression/gh-7304/options.json
@@ -7,7 +7,8 @@
         "targets": {
           "node": 8
         },
-        "useBuiltIns": "usage"
+        "useBuiltIns": "usage",
+        "corejs": 3
       }
     ]
   ],

diff --git a/packages/babel-plugin-transform-runtime/package.json b/packages/babel-plugin-transform-runtime/package.json
@@ -25,6 +25,8 @@
     "@babel/helper-plugin-test-runner": "^7.0.0",
     "@babel/helpers": "^7.2.0",
     "@babel/plugin-transform-runtime": "^7.3.4",
+    "@babel/plugin-transform-member-expression-literals": "^7.2.0",
+    "@babel/plugin-transform-property-literals": "^7.2.0",
     "@babel/preset-env": "^7.3.4",
     "@babel/runtime": "^7.3.4",
     "@babel/template": "^7.0.0",

diff --git a/packages/babel-plugin-transform-runtime/scripts/build-dist.js b/packages/babel-plugin-transform-runtime/scripts/build-dist.js
@@ -8,43 +8,81 @@ const template = require("@babel/template");
 const t = require("@babel/types");
 
 const transformRuntime = require("../");
-const getCorejs2Definitions = require("../lib/definitions").default;
-const corejs2Definitions = getCorejs2Definitions();
+const transformMemberExpressionLiterals = require("@babel/plugin-transform-member-expression-literals");
+const transformPropertyLiterals = require("@babel/plugin-transform-property-literals");
 
-writeHelpers("@babel/runtime");
+const corejs2Definitions = require("../lib/runtime-corejs2-definitions").default();
+const corejs3Definitions = require("../lib/runtime-corejs3-definitions").default();
 
-writeCoreJS2("@babel/runtime-corejs2");
+writeHelpers("@babel/runtime");
 writeHelpers("@babel/runtime-corejs2", { corejs: 2 });
-
-function writeCoreJS2(runtimeName) {
-  const pkgDirname = getRuntimeRoot(runtimeName);
-
-  const paths = [
+writeHelpers("@babel/runtime-corejs3", {
+  corejs: { version: 3, proposals: true },
+});
+
+writeCoreJS({
+  corejs: 2,
+  proposals: true,
+  definitions: corejs2Definitions,
+  paths: [
     "is-iterable",
     "get-iterator",
-
     // This was previously in definitions, but was removed to work around
     // zloirock/core-js#262. We need to keep it in @babel/runtime-corejs2 to
     // avoid a breaking change there.
     "symbol/async-iterator",
-  ];
-
-  Object.keys(corejs2Definitions.builtins).forEach(key => {
-    const path = corejs2Definitions.builtins[key];
-    paths.push(path);
+  ],
+  corejsRoot: "core-js/library/fn",
+});
+writeCoreJS({
+  corejs: 3,
+  proposals: false,
+  definitions: corejs3Definitions,
+  paths: [],
+  corejsRoot: "core-js-pure/stable",
+});
+writeCoreJS({
+  corejs: 3,
+  proposals: true,
+  definitions: corejs3Definitions,
+  paths: ["is-iterable", "get-iterator", "get-iterator-method"],
+  corejsRoot: "core-js-pure/features",
+});
+
+function writeCoreJS({
+  corejs,
+  proposals,
+  definitions: { BuiltIns, StaticProperties, InstanceProperties },
+  paths,
+  corejsRoot,
+}) {
+  const pkgDirname = getRuntimeRoot(`@babel/runtime-corejs${corejs}`);
+
+  Object.keys(BuiltIns).forEach(name => {
+    const { stable, path } = BuiltIns[name];
+    if (stable || proposals) paths.push(path);
   });
 
-  Object.keys(corejs2Definitions.methods).forEach(key => {
-    const props = corejs2Definitions.methods[key];
-    Object.keys(props).forEach(key2 => {
-      paths.push(props[key2]);
+  Object.keys(StaticProperties).forEach(builtin => {
+    const props = StaticProperties[builtin];
+    Object.keys(props).forEach(name => {
+      const { stable, path } = props[name];
+      if (stable || proposals) paths.push(path);
     });
   });
 
-  paths.forEach(function(corePath) {
+  if (InstanceProperties) {
+    Object.keys(InstanceProperties).forEach(name => {
+      const { stable, path } = InstanceProperties[name];
+      if (stable || proposals) paths.push(`instance/${path}`);
+    });
+  }
+
+  const runtimeRoot = proposals ? "core-js" : "core-js-stable";
+  paths.forEach(function(corejsPath) {
     outputFile(
-      path.join(pkgDirname, "core-js", `${corePath}.js`),
-      `module.exports = require("core-js/library/fn/${corePath}");`
+      path.join(pkgDirname, runtimeRoot, `${corejsPath}.js`),
+      `module.exports = require("${corejsRoot}/${corejsPath}");`
     );
   });
 }
@@ -118,6 +156,8 @@ function buildHelper(
     presets: [[require("@babel/preset-env"), { modules: false }]],
     plugins: [
       [transformRuntime, { corejs, useESModules: esm }],
+      [transformMemberExpressionLiterals],
+      [transformPropertyLiterals],
       buildRuntimeRewritePlugin(
         runtimeName,
         path.relative(path.dirname(helperFilename), pkgDirname),