feat: support core-js 3 (#5291)

distributions/nuxt-legacy/bin/nuxt-legacy.js

@@ -1,6 +1,7 @@
 #!/usr/bin/env node
 
-require('@babel/polyfill')
+require('core-js/stable')
+require('renegerator-runtime/runtime')
 
 require('@babel/register')({
   presets: [

distributions/nuxt-legacy/package.json

@@ -51,15 +51,16 @@
   "bin": "bin/nuxt-legacy.js",
   "dependencies": {
     "@babel/core": "^7.4.0",
-    "@babel/polyfill": "^7.4.0",
     "@babel/preset-env": "^7.4.1",
     "@babel/register": "^7.4.0",
     "@nuxt/builder": "2.4.5",
     "@nuxt/cli": "2.4.5",
     "@nuxt/core": "2.4.5",
     "@nuxt/generator": "2.4.5",
     "@nuxt/opencollective": "^0.2.1",
-    "@nuxt/webpack": "2.4.5"
+    "@nuxt/webpack": "2.4.5",
+    "core-js": "3",
+    "regenerator-runtime": "^0.13.1"
   },
   "engines": {
     "node": ">=6.0.0",

packages/babel-preset-app/README.md

@@ -37,7 +37,7 @@ Below is a list of all available parameters:
 * **loose**, default `false` - '[@babel/preset-env](https://babeljs.io/docs/en/babel-preset-env#loose)' parameter and also sets `loose=true` for `@babel/plugin-proposal-class-properties`
 * **modern** passed by builder, either `true` or `false`
 * **modules**, default `false` - '[@babel/preset-env](https://babeljs.io/docs/en/babel-preset-env#modules)' parameter
-* **polyfills**, default `['es6.array.iterator','es6.promise','es6.object.assign','es7.promise.finally']`, more [in the corresponding repository](https://github.com/zloirock/core-js)
+* **polyfills**, default `['es.array.iterator','es.promise','es.object.assign','es.promise.finally']`, more [in the corresponding repository](https://github.com/zloirock/core-js)
 * **shippedProposals** - '[@babel/preset-env](https://babeljs.io/docs/en/babel-preset-env#shippedproposals)' parameter
 * **spec** - '[@babel/preset-env](https://babeljs.io/docs/en/babel-preset-env#spec)' parameter
 * **targets** - '[@babel/preset-env](https://babeljs.io/docs/en/babel-preset-env#targets)' parameter

packages/babel-preset-app/package.json

@@ -17,7 +17,9 @@
     "@babel/plugin-transform-runtime": "^7.4.0",
     "@babel/preset-env": "^7.4.1",
     "@babel/runtime": "^7.4.0",
-    "@vue/babel-preset-jsx": "^1.0.0-beta.2"
+    "@babel/runtime-corejs3": "^7.4.0",
+    "@vue/babel-preset-jsx": "^1.0.0-beta.2",
+    "core-js": "3"
   },
   "publishConfig": {
     "access": "public"

packages/babel-preset-app/src/index.js

@@ -3,19 +3,19 @@ const path = require('path')
 const defaultPolyfills = [
   // Promise polyfill alone doesn't work in IE,
   // Needs this as well. see: #1642
-  'es6.array.iterator',
+  'es.array.iterator',
   // This is required for webpack code splitting, vuex etc.
-  'es6.promise',
+  'es.promise',
   // this is needed for object rest spread support in templates
   // as vue-template-es2015-compiler 1.8+ compiles it to Object.assign() calls.
-  'es6.object.assign',
-  // #2012 es6.promise replaces native Promise in FF and causes missing finally
-  'es7.promise.finally'
+  'es.object.assign',
+  // #2012 es.promise replaces native Promise in FF and causes missing finally
+  'es.promise.finally'
 ]
 
 function getPolyfills(targets, includes, { ignoreBrowserslistConfig, configPath }) {
   const { isPluginRequired } = require('@babel/preset-env')
-  const builtInsList = require('@babel/preset-env/data/built-ins.json')
+  const builtInsList = require('core-js-compat/data')
   const getTargets = require('@babel/preset-env/lib/targets-parser').default
   const builtInTargets = getTargets(targets, {
     ignoreBrowserslistConfig,
@@ -67,6 +67,8 @@ module.exports = (context, options = {}) => {
     polyfills = []
   }
 
+  const corejs = { version: 3 }
+
   // Pass options along to babel-preset-env
   presets.push([
     require('@babel/preset-env'), {
@@ -76,6 +78,7 @@ module.exports = (context, options = {}) => {
       modules,
       targets,
       useBuiltIns,
+      corejs,
       ignoreBrowserslistConfig,
       configPath,
       include,
@@ -102,7 +105,7 @@ module.exports = (context, options = {}) => {
   // Transform runtime, but only for helpers
   plugins.push([require('@babel/plugin-transform-runtime'), {
     regenerator: useBuiltIns !== 'usage',
-    corejs: useBuiltIns !== false ? false : 2,
+    corejs: useBuiltIns !== false ? false : corejs,
     helpers: useBuiltIns === 'usage',
     useESModules: true,
     absoluteRuntime: path.dirname(require.resolve('@babel/runtime/package.json'))

packages/webpack/package.json

@@ -9,7 +9,6 @@
   "main": "dist/webpack.js",
   "dependencies": {
     "@babel/core": "^7.4.0",
-    "@babel/polyfill": "^7.4.0",
     "@nuxt/babel-preset-app": "2.4.5",
     "@nuxt/friendly-errors-webpack-plugin": "^2.4.0",
     "@nuxt/utils": "2.4.5",

test/unit/async-config.size-limit.test.js

@@ -36,6 +36,6 @@ describe('size-limit test', () => {
     const responseSizeBytes = responseSizes.reduce((bytes, responseLength) => bytes + responseLength, 0)
     const responseSizeKilobytes = Math.ceil(responseSizeBytes / 1024)
     // Without gzip!
-    expect(responseSizeKilobytes).toBeLessThanOrEqual(185)
+    expect(responseSizeKilobytes).toBeLessThanOrEqual(191)
   })
 })