BREAKING CHANGES: bump Babel to 8.0.0-beta.1

packages/babel/package.json

@@ -53,8 +53,7 @@
     "es6"
   ],
   "peerDependencies": {
-    "@babel/core": "^7.0.0",
-    "@types/babel__core": "^7.1.9",
+    "@babel/core": "^8.0.0-beta.1",
     "rollup": "^1.20.0||^2.0.0||^3.0.0||^4.0.0"
   },
   "peerDependenciesMeta": {
@@ -70,15 +69,13 @@
     "@rollup/pluginutils": "^5.0.1"
   },
   "devDependencies": {
-    "@babel/core": "^7.19.1",
-    "@babel/plugin-external-helpers": "^7.18.6",
-    "@babel/plugin-proposal-decorators": "^7.19.1",
-    "@babel/plugin-syntax-dynamic-import": "^7.8.3",
-    "@babel/plugin-transform-runtime": "^7.19.1",
-    "@babel/preset-env": "^7.19.1",
+    "@babel/core": "^8.0.0-beta.1",
+    "@babel/plugin-external-helpers": "^8.0.0-beta.1",
+    "@babel/plugin-proposal-decorators": "^8.0.0-beta.1",
+    "@babel/plugin-transform-runtime": "^8.0.0-beta.1",
+    "@babel/preset-env": "^8.0.0-beta.1",
     "@rollup/plugin-json": "^5.0.0",
     "@rollup/plugin-node-resolve": "^15.0.0",
-    "@types/babel__core": "^7.1.9",
     "rollup": "^4.0.0-24",
     "source-map": "^0.7.4"
   },

packages/babel/test/as-input-plugin.mjs

@@ -258,13 +258,13 @@ test('allows transform-runtime to inject esm version of helpers', async (t) => {
     }
   );
   t.deepEqual(warnings, [
-    `"@babel/runtime/helpers/esm/createClass" is imported by "test/fixtures/runtime-helpers-esm/main.js", but could not be resolved – treating it as an external dependency.`,
-    `"@babel/runtime/helpers/esm/classCallCheck" is imported by "test/fixtures/runtime-helpers-esm/main.js", but could not be resolved – treating it as an external dependency.`
+    `"@babel/runtime/helpers/createClass" is imported by "test/fixtures/runtime-helpers-esm/main.js", but could not be resolved – treating it as an external dependency.`,
+    `"@babel/runtime/helpers/classCallCheck" is imported by "test/fixtures/runtime-helpers-esm/main.js", but could not be resolved – treating it as an external dependency.`
   ]);
   t.is(
     code,
-    `import _createClass from '@babel/runtime/helpers/esm/createClass';
-import _classCallCheck from '@babel/runtime/helpers/esm/classCallCheck';
+    `import _createClass from '@babel/runtime/helpers/createClass';
+import _classCallCheck from '@babel/runtime/helpers/classCallCheck';
 
 var Foo = /*#__PURE__*/_createClass(function Foo() {
   _classCallCheck(this, Foo);
@@ -540,7 +540,7 @@ test('can be used as an input plugin while transforming the output', async (t) =
     input: `${FIXTURES}basic/main.js`,
     plugins: [
       getBabelOutputPlugin({
-        presets: ['@babel/env']
+        presets: [['@babel/env', { targets: 'firefox 2' }]]
       })
     ]
   });
@@ -556,7 +556,7 @@ test('works as a CJS plugin', async (t) => {
     input: `${FIXTURES}basic/main.js`,
     plugins: [
       babelPluginCjs({
-        presets: ['@babel/env']
+        presets: [['@babel/env', { targets: 'firefox 2' }]]
       })
     ]
   });

packages/babel/test/as-output-plugin.mjs

@@ -63,7 +63,7 @@ async function generate(input, babelOptions = {}, generateOptions = {}, rollupOp
 
 test('allows running the plugin on the output via output options', async (t) => {
   const code = await generate('basic/main.js', {
-    presets: ['@babel/env']
+    presets: [['@babel/env', { targets: 'firefox 2' }]]
   });
   t.false(code.includes('const'));
 });
@@ -73,21 +73,21 @@ test('ignores .babelrc when transforming the output by default', async (t) => {
   t.true(code.includes('const'));
 });
 
-test("allows transform-runtime to be used with `useESModules: false` (the default) and `format: 'cjs'`", async (t) => {
+test("allows transform-runtime to be used with `format: 'cjs'`", async (t) => {
   const code = await generate(
     'runtime-helpers/main.js',
     {
-      presets: ['@babel/env'],
-      plugins: [['@babel/transform-runtime', { useESModules: false }]]
+      presets: [['@babel/env', { targets: 'firefox 2' }]],
+      plugins: [['@babel/transform-runtime']]
     },
     { format: 'cjs' }
   );
   t.is(
     code,
     `'use strict';
 
-var _createClass = require("@babel/runtime/helpers/createClass");
-var _classCallCheck = require("@babel/runtime/helpers/classCallCheck");
+var _createClass = require("@babel/runtime/helpers/createClass").default;
+var _classCallCheck = require("@babel/runtime/helpers/classCallCheck").default;
 var Foo = /*#__PURE__*/_createClass(function Foo() {
   _classCallCheck(this, Foo);
 });
@@ -96,19 +96,19 @@ module.exports = Foo;
   );
 });
 
-test("allows transform-runtime to be used with `useESModules: true` and `format: 'es'`", async (t) => {
+test("allows transform-runtime to be used with `format: 'es'`", async (t) => {
   const code = await generate(
     'runtime-helpers/main.js',
     {
-      presets: ['@babel/env'],
-      plugins: [['@babel/transform-runtime', { useESModules: true }]]
+      presets: [['@babel/env', { targets: 'firefox 2' }]],
+      plugins: [['@babel/transform-runtime']]
     },
     { format: 'es' }
   );
   t.is(
     code,
-    `import _createClass from "@babel/runtime/helpers/esm/createClass";
-import _classCallCheck from "@babel/runtime/helpers/esm/classCallCheck";
+    `import _createClass from "@babel/runtime/helpers/createClass";
+import _classCallCheck from "@babel/runtime/helpers/classCallCheck";
 var Foo = /*#__PURE__*/_createClass(function Foo() {
   _classCallCheck(this, Foo);
 });
@@ -155,7 +155,7 @@ test('allows using external-helpers plugin even if the externalHelpers flag is n
   const code = await generate(
     'external-helpers/main.js',
     {
-      presets: ['@babel/env'],
+      presets: [['@babel/env', { targets: 'firefox 2' }]],
       plugins: ['@babel/external-helpers']
     },
     {},
@@ -211,8 +211,7 @@ test('transforms all chunks in a code-splitting setup', async (t) => {
       format: 'es',
       plugins: [
         getBabelOutputPlugin({
-          plugins: ['@babel/syntax-dynamic-import'],
-          presets: ['@babel/env']
+          presets: [['@babel/env', { targets: 'firefox 2' }]]
         })
       ]
     },
@@ -246,7 +245,7 @@ test('transforms all chunks when preserving modules', async (t) => {
       preserveModules: true,
       plugins: [
         getBabelOutputPlugin({
-          presets: ['@babel/env']
+          presets: [['@babel/env', { targets: 'firefox 2' }]]
         })
       ]
     },
@@ -320,7 +319,7 @@ test('throws when using a Rollup output format other than esm or cjs', async (t)
 test('allows using a Rollup output format other than esm or cjs with allowAllFormats', async (t) => {
   const code = await generate(
     'basic/main.js',
-    { presets: ['@babel/env'], allowAllFormats: true },
+    { presets: [['@babel/env', { targets: 'firefox 2' }]], allowAllFormats: true },
     { format: 'iife' }
   );
   t.is(
@@ -338,7 +337,7 @@ test('allows using a Rollup output format other than esm or cjs with allowAllFor
 test('allows using Babel to transform to other formats', async (t) => {
   const code = await generate(
     'basic/main.js',
-    { presets: [['@babel/env', { modules: 'umd' }]] },
+    { presets: [['@babel/env', { modules: 'umd', targets: 'firefox 2' }]] },
     { format: 'es' }
   );
   t.is(

packages/babel/test/fixtures/.babelrc

@@ -1,3 +1,3 @@
 {
-  "presets": [ "@babel/env" ]
+  "presets": [ ["@babel/env", { "targets": "firefox 2" }] ]
 }

packages/babel/test/fixtures/class-loose/.babelrc

@@ -1,3 +1,23 @@
 {
-  "presets": [ ["@babel/env", { "loose": true } ] ]
+  "presets": [
+    ["@babel/preset-env", { "exclude": ["transform-typeof-symbol"], "targets": "firefox 2" }]
+  ],
+  "assumptions": {
+    "arrayLikeIsIterable": true,
+    "constantReexports": true,
+    "ignoreFunctionLength": true,
+    "ignoreToPrimitiveHint": true,
+    "mutableTemplateObject": true,
+    "noClassCalls": true,
+    "noDocumentAll": true,
+    "objectRestNoSymbols": true,
+    "privateFieldsAsProperties": true,
+    "pureGetters": true,
+    "setClassMethods": true,
+    "setComputedProperties": true,
+    "setPublicClassFields": true,
+    "setSpreadProperties": true,
+    "skipForOfIteratorClosing": true,
+    "superIsCallableConstructor": true
+  }
 }

packages/babel/test/fixtures/external-helpers/.babelrc

@@ -1,4 +1,4 @@
 {
-  "presets": [ "@babel/env" ],
+  "presets": [ ["@babel/env", { "targets": "firefox 2" } ] ],
   "plugins": [ "@babel/external-helpers" ]
 }

packages/babel/test/fixtures/ignored-file/.babelrc

@@ -1,4 +1,24 @@
 {
-  "presets": [ ["@babel/env", { "loose": true } ] ],
+  "presets": [
+    ["@babel/preset-env", { "exclude": ["transform-typeof-symbol"] }]
+  ],
+  "assumptions": {
+    "arrayLikeIsIterable": true,
+    "constantReexports": true,
+    "ignoreFunctionLength": true,
+    "ignoreToPrimitiveHint": true,
+    "mutableTemplateObject": true,
+    "noClassCalls": true,
+    "noDocumentAll": true,
+    "objectRestNoSymbols": true,
+    "privateFieldsAsProperties": true,
+    "pureGetters": true,
+    "setClassMethods": true,
+    "setComputedProperties": true,
+    "setPublicClassFields": true,
+    "setSpreadProperties": true,
+    "skipForOfIteratorClosing": true,
+    "superIsCallableConstructor": true
+  },
   "ignore": ["ignored.js"]
 }

packages/babel/test/fixtures/proposal-decorators/.babelrc

@@ -1,6 +1,6 @@
 {
-  "presets": [ "@babel/env" ],
+  "presets": [ ["@babel/env", { "targets": "firefox 2" } ] ],
   "plugins": [
-    ["@babel/proposal-decorators", { "legacy": true }]
+    ["@babel/proposal-decorators", { "version": "legacy" }]
   ]
 }

packages/babel/test/fixtures/runtime-helpers-builtins/.babelrc

@@ -1,5 +1,5 @@
 {
-  "presets": [ "@babel/env" ],
+  "presets": [ ["@babel/env", { "targets": "firefox 2" } ] ],
   "plugins": [
     [ "@babel/transform-runtime" ]
   ]

packages/babel/test/fixtures/runtime-helpers-esm/.babelrc

@@ -1,6 +1,6 @@
 {
-  "presets": [ "@babel/env" ],
+  "presets": [ ["@babel/env", { "targets": "firefox 2" } ] ],
   "plugins": [
-    [ "@babel/transform-runtime", { "useESModules": true } ]
+    [ "@babel/transform-runtime" ]
   ]
 }

packages/babel/test/fixtures/runtime-helpers/.babelrc

@@ -1,4 +1,4 @@
 {
-  "presets": [ "@babel/env" ],
+  "presets": [ ["@babel/env", { "targets": "firefox 2" } ] ],
   "plugins": [ "@babel/external-helpers", "@babel/transform-runtime" ]
 }