.eslintignore

@@ -1,4 +1,5 @@
 node_modules/
+/deno/corejs/
 /packages/core-js-bundle/
 /packages/core-js-compat/*.json
 /packages/core-js-pure/override/

.eslintrc.js

@@ -1,7 +1,7 @@
 'use strict';
 const RESTRICTED_GLOBALS = require('confusing-browser-globals');
 const SUPPORTED_NODE_VERSIONS = require('core-js-builder/package').engines.node;
-const DEV_NODE_VERSIONS = '^10.17';
+const DEV_NODE_VERSIONS = '^14.15';
 
 function disable(rules) {
   return Object.keys(rules).reduce((memo, rule) => {
@@ -314,8 +314,6 @@ const base = {
   // node:
   // disallow deprecated APIs
   'node/no-deprecated-api': 'error',
-  // enforce the style of file extensions in `import` declarations
-  'node/file-extension-in-import': ['error', 'never'],
   // require require() calls to be placed at top-level module scope
   'node/global-require': 'error',
   // disallow the assignment to `exports`
@@ -356,6 +354,8 @@ const base = {
   'prefer-exponentiation-operator': 'error',
   // require template literals instead of string concatenation
   'prefer-template': 'error',
+  // disallow generator functions that do not have `yield`
+  'require-yield': 'error',
   // enforce spacing between rest and spread operators and their expressions
   'rest-spread-spacing': 'error',
   // require or disallow spacing around embedded expressions of template strings
@@ -417,8 +417,12 @@ const base = {
   'sonarjs/no-duplicated-branches': 'error',
   // collection elements should not be replaced unconditionally
   'sonarjs/no-element-overwrite': 'error',
+  // empty collections should not be accessed or iterated
+  'sonarjs/no-empty-collection': 'error',
   // function calls should not pass extra arguments
   'sonarjs/no-extra-arguments': 'error',
+  // goolean expressions should not be gratuitous
+  'sonarjs/no-gratuitous-expressions': 'error',
   // functions should not have identical implementations
   'sonarjs/no-identical-functions': 'error',
   // boolean checks should not be inverted
@@ -435,6 +439,8 @@ const base = {
   'sonarjs/no-unused-collection': 'error',
   // the output of functions that don't return anything should not be used
   'sonarjs/no-use-of-empty-return-value': 'error',
+  // non-existent operators '=+', '=-' and '=!' should not be used
+  'sonarjs/non-existent-operator': 'error',
   // local variables should not be declared and then immediately returned or thrown
   'sonarjs/prefer-immediate-return': 'error',
   // object literal syntax should be used
@@ -492,6 +498,8 @@ const base = {
   'regexp/no-potentially-useless-backreference': 'error',
   // disallow standalone backslashes
   'regexp/no-standalone-backslash': 'error',
+  // disallow exponential and polynomial backtracking
+  'regexp/no-super-linear-backtracking': 'error',
   // disallow trivially nested assertions
   'regexp/no-trivially-nested-assertion': 'error',
   // disallow nested quantifiers that can be rewritten as one quantifier
@@ -760,8 +768,6 @@ const transpiledAndPolyfilled = {
 };
 
 const nodePackages = {
-  // disallow unsupported ECMAScript syntax on the specified version
-  'node/no-unsupported-features/es-syntax': ['error', { version: SUPPORTED_NODE_VERSIONS }],
   // disallow unsupported ECMAScript built-ins on the specified version
   'node/no-unsupported-features/node-builtins': ['error', { version: SUPPORTED_NODE_VERSIONS }],
   ...disable(forbidES5BuiltIns),
@@ -777,16 +783,11 @@ const nodePackages = {
 };
 
 const nodeDev = {
-  ...nodePackages,
-  // disallow unsupported ECMAScript syntax on the specified version
-  'node/no-unsupported-features/es-syntax': ['error', { version: DEV_NODE_VERSIONS }],
   // disallow unsupported ECMAScript built-ins on the specified version
   'node/no-unsupported-features/node-builtins': ['error', { version: DEV_NODE_VERSIONS }],
-  ...disable(forbidES5BuiltIns),
-  ...disable(forbidES2015BuiltIns),
-  ...disable(forbidES2016BuiltIns),
-  ...disable(forbidES2017BuiltIns),
-  ...disable(forbidES2018BuiltIns),
+  ...disable(forbidModernESBuiltIns),
+  ...forbidES2021BuiltIns,
+  'es/no-weakrefs': 'off',
 };
 
 const tests = {
@@ -938,7 +939,7 @@ const json = {
 module.exports = {
   root: true,
   parserOptions: {
-    ecmaVersion: 2021,
+    ecmaVersion: 'latest',
   },
   env: {
     // unnececery global builtins disabled by related rules
@@ -1064,6 +1065,40 @@ module.exports = {
         Observable: true,
       },
     },
+    {
+      files: ['*.mjs'],
+      parser: '@babel/eslint-parser',
+      parserOptions: {
+        babelOptions: {
+          plugins: ['@babel/plugin-syntax-top-level-await'],
+        },
+        ecmaVersion: 2022,
+        requireConfigFile: false,
+        sourceType: 'module',
+      },
+    },
+    {
+      files: [
+        'packages/core-js-compat/src/**',
+        'scripts/**',
+      ],
+      // zx
+      globals: {
+        $: true,
+        __dirname: true,
+        __filename: true,
+        argv: true,
+        cd: true,
+        chalk: true,
+        fetch: true,
+        fs: true,
+        os: true,
+        nothrow: true,
+        question: true,
+        require: true,
+        sleep: true,
+      },
+    },
     {
       files: ['*.json'],
       parser: 'jsonc-eslint-parser',

.github/FUNDING.yml

@@ -1,3 +1,4 @@
 open_collective: core-js
 patreon: zloirock
+custom: paypal.me/zloirock
 tidelift: npm/core-js

.github/workflows/tests.yml

@@ -14,8 +14,6 @@ jobs:
           'macos-latest',
         ]
         node: [
-          '10.17',
-          '12.13',
           '14.15',
           '16',
         ]

CHANGELOG.md

@@ -2,6 +2,38 @@
 ##### Unreleased
 - Nothing
 
+##### 3.16.0 - 2021.07.30
+- [`Array` find from last proposal](https://github.com/tc39/proposal-array-find-from-last) moved to the stage 3, [July 2021 TC39 meeting](https://github.com/tc39/proposal-array-find-from-last/pull/47)
+- [`Array` filtering stage 1 proposal](https://github.com/tc39/proposal-array-filtering):
+  - `Array.prototype.filterReject` replaces `Array.prototype.filterOut`
+  - `%TypedArray%.prototype.filterReject` replaces `%TypedArray%.prototype.filterOut`
+- Added [`Array` grouping stage 1 proposal](https://github.com/tc39/proposal-array-grouping):
+  - `Array.prototype.groupBy`
+  - `%TypedArray%.prototype.groupBy`
+- Work with symbols made stricter: some missed before cases of methods that should throw an error on symbols now works as they should
+- Handling `@@toPrimitive` in some cases of `ToPrimitive` internal logic made stricter
+- Fixed work of `Request` with polyfilled `URLSearchParams`, [#965](https://github.com/zloirock/core-js/issues/965)
+- Fixed possible exposing of collections elements metadata in some cases, [#427](https://github.com/zloirock/core-js/issues/427)
+- Fixed crashing of `Object.create(null)` on WSH, [#966](https://github.com/zloirock/core-js/issues/966)
+- Fixed some cases of typed arrays subclassing logic
+- Fixed a minor bug related to string conversion in `RegExp#exec`
+- Fixed `Date.prototype.getYear` feature detection
+- Fixed content of some entry points
+- Some minor optimizations and refactoring
+- Deno:
+  - Added Deno support (sure, after bundling since Deno does not support CommonJS)
+  - Allowed `deno` target in `core-js-compat` / `core-js-builder`
+  - A bundle for Deno published on [deno.land/x/corejs](https://deno.land/x/corejs)
+- Added / updated compat data / mapping:
+  - Deno 1.0-1.13
+  - NodeJS up to 16.6
+  - iOS Safari up to 15.0
+  - Samsung Internet up to 15.0
+  - Opera Android up to 64
+  - `Object.hasOwn` marked as supported from [V8 9.3](https://chromestatus.com/feature/5662263404920832) and [FF92](https://bugzilla.mozilla.org/show_bug.cgi?id=1721149)
+  - `Date.prototype.getYear` marked as not supported in IE8-
+- Added `summary` option to `core-js-builder`, see more info in the [`README`](https://github.com/zloirock/core-js/blob/master/packages/core-js-builder/README.md), [#910](https://github.com/zloirock/core-js/issues/910)
+
 ##### 3.15.2 - 2021.06.29
 - Worked around breakage related to `zone.js` loaded before `core-js`, [#953](https://github.com/zloirock/core-js/issues/953)
 - Added NodeJS 16.4 -> Chrome 91 compat data mapping

CONTRIBUTING.md

@@ -8,10 +8,10 @@ Contributions are always welcome. If you don't know how you can help, you can ch
 - Any shared helpers should be added to the [`packages/core-js/internals`](./packages/core-js/internals) directory.
 - If the implementation for the `pure` version differs from the global version, add it to [`packages/core-js-pure/override`](./packages/core-js-pure/override) directory. The rest parts of `core-js-pure` will be copied from `core-js` package.
 - For export the polyfill, in almost all cases use `internals/export` helper.
-- Add feature detection of the polyfill to [`tests/compat/tests.js`](./tests/compat/tests.js) and compatibility data to [`packages/core-js-compat/src/data.js`](./packages/core-js-compat/src/data.js) and [`packages/core-js-compat/src/modules-by-versions.js`](./packages/core-js-compat/src/modules-by-versions.js) (this data also used for getting the default list of polyfills at bundling).
+- Add feature detection of the polyfill to [`tests/compat/tests.js`](./tests/compat/tests.js) and compatibility data to [`packages/core-js-compat/src/data.mjs`](./packages/core-js-compat/src/data.mjs) and [`packages/core-js-compat/src/modules-by-versions.mjs`](./packages/core-js-compat/src/modules-by-versions.mjs) (this data also used for getting the default list of polyfills at bundling).
 - Add it to entry points where it's required: directories [`packages/core-js/features`](./packages/core-js/features), [`packages/core-js/es`](./packages/core-js/es), [`packages/core-js/proposals`](./packages/core-js/proposals), [`packages/core-js/stage`](./packages/core-js/stage) and [`packages/core-js/web`](./packages/core-js/web).
 - Add unit tests to [`tests/tests`](./tests/tests) and [`tests/pure`](./tests/pure).
-- Add tests of entry points to [`tests/commonjs.js`](./tests/commonjs).
+- Add tests of entry points to [`tests/commonjs.js`](./tests/commonjs.js).
 - Add documentation to [README.md](./README.md).
 
 ## Style and standards
@@ -78,6 +78,6 @@ For updating `core-js-compat` data:
 - Clone `core-js` repo.
 - If you wanna add new data for a browser, run in this browser `tests/compat/index.html` and you will see which `core-js` modules required for this browser.
 - If you wanna add new data for Node.js, run `tests/compat/node-runner.js` in required Node.js version and you will see results in the console.
-- After getting this data, add it to [`packages/core-js-compat/src/data.js`](./packages/core-js-compat/src/data.js).
-- If you wanna add new mapping (for example, add a new iOS Safari version based on Safari or Node.js based on Chrome), add it to [`packages/core-js-compat/src/mapping.js`](./packages/core-js-compat/src/mapping.js).
+- After getting this data, add it to [`packages/core-js-compat/src/data.mjs`](./packages/core-js-compat/src/data.mjs).
+- If you wanna add new mapping (for example, add a new iOS Safari version based on Safari or Node.js based on Chrome), add it to [`packages/core-js-compat/src/mapping.mjs`](./packages/core-js-compat/src/mapping.mjs).
 - Add a pull request to `core-js` repo.