babel · nicolo-ribaudo · May 24, 2020 · Apr 20, 2020
diff --git a/packages/babel-compat-data/data/plugins.json b/packages/babel-compat-data/data/plugins.json
@@ -9,6 +9,17 @@
     "ios": "13",
     "electron": "6.1"
   },
+  "proposal-class-properties": {
+    "chrome": "74",
+    "opera": "61",
+    "edge": "79",
+    "node": "12",
+    "electron": "6.1"
+  },
+  "proposal-private-methods": {
+    "chrome": "84",
+    "opera": "71"
+  },
   "proposal-nullish-coalescing-operator": {
     "chrome": "80",
     "opera": "67",

diff --git a/packages/babel-compat-data/scripts/data/plugin-features.js b/packages/babel-compat-data/scripts/data/plugin-features.js
@@ -123,6 +123,10 @@ const es2020 = {
 
 const shippedProposal = {
   "proposal-numeric-separator": "numeric separator",
+  "proposal-class-properties": {
+    features: ["static class fields", "instance class fields"],
+  },
+  "proposal-private-methods": "private class methods",
 };
 
 // Run plugins for modern features first

diff --git a/packages/babel-preset-env/data/shipped-proposals.js b/packages/babel-preset-env/data/shipped-proposals.js
@@ -3,18 +3,23 @@
 // shipped by browsers, and are enabled by the `shippedProposals` option.
 
 const proposalPlugins = new Set([
+  "proposal-class-properties",
   "proposal-numeric-separator",
+  "proposal-private-methods"
 ]);
 
 // use intermediary object to enforce alphabetical key order
 const pluginSyntaxObject = {
   "proposal-async-generator-functions": "syntax-async-generators",
+  "proposal-class-properties": "syntax-class-properties",
   "proposal-json-strings": "syntax-json-strings",
   "proposal-nullish-coalescing-operator": "syntax-nullish-coalescing-operator",
   "proposal-numeric-separator": "syntax-numeric-separator",
   "proposal-object-rest-spread": "syntax-object-rest-spread",
   "proposal-optional-catch-binding": "syntax-optional-catch-binding",
   "proposal-optional-chaining": "syntax-optional-chaining",
+  // note: we don't have syntax-private-methods
+  "proposal-private-methods": "syntax-class-properties",
   "proposal-unicode-property-regex": null,
 };
 

diff --git a/packages/babel-preset-env/package.json b/packages/babel-preset-env/package.json
@@ -16,13 +16,15 @@
     "@babel/helper-module-imports": "^7.8.3",
     "@babel/helper-plugin-utils": "^7.8.3",
     "@babel/plugin-proposal-async-generator-functions": "^7.8.3",
+    "@babel/plugin-proposal-class-properties": "^7.8.3",
     "@babel/plugin-proposal-dynamic-import": "^7.8.3",
     "@babel/plugin-proposal-json-strings": "^7.8.3",
     "@babel/plugin-proposal-nullish-coalescing-operator": "^7.8.3",
     "@babel/plugin-proposal-numeric-separator": "^7.8.3",
     "@babel/plugin-proposal-object-rest-spread": "^7.9.5",
     "@babel/plugin-proposal-optional-catch-binding": "^7.8.3",
     "@babel/plugin-proposal-optional-chaining": "^7.9.0",
+    "@babel/plugin-proposal-private-methods": "^7.8.3",
     "@babel/plugin-proposal-unicode-property-regex": "^7.8.3",
     "@babel/plugin-syntax-async-generators": "^7.8.0",
     "@babel/plugin-syntax-dynamic-import": "^7.8.0",
@@ -32,6 +34,7 @@
     "@babel/plugin-syntax-object-rest-spread": "^7.8.0",
     "@babel/plugin-syntax-optional-catch-binding": "^7.8.0",
     "@babel/plugin-syntax-optional-chaining": "^7.8.0",
+    "@babel/plugin-syntax-class-properties": "^7.8.3",
     "@babel/plugin-syntax-top-level-await": "^7.8.3",
     "@babel/plugin-transform-arrow-functions": "^7.8.3",
     "@babel/plugin-transform-async-to-generator": "^7.8.3",

diff --git a/packages/babel-preset-env/src/available-plugins.js b/packages/babel-preset-env/src/available-plugins.js
@@ -2,6 +2,7 @@
 /* eslint sort-keys: "error" */
 
 import syntaxAsyncGenerators from "@babel/plugin-syntax-async-generators";
+import syntaxClassProperties from "@babel/plugin-syntax-class-properties";
 import syntaxDynamicImport from "@babel/plugin-syntax-dynamic-import";
 import syntaxJsonStrings from "@babel/plugin-syntax-json-strings";
 import syntaxNullishCoalescingOperator from "@babel/plugin-syntax-nullish-coalescing-operator";
@@ -11,13 +12,15 @@ import syntaxOptionalCatchBinding from "@babel/plugin-syntax-optional-catch-bind
 import syntaxOptionalChaining from "@babel/plugin-syntax-optional-chaining";
 import syntaxTopLevelAwait from "@babel/plugin-syntax-top-level-await";
 import proposalAsyncGeneratorFunctions from "@babel/plugin-proposal-async-generator-functions";
+import proposalClassProperties from "@babel/plugin-proposal-class-properties";
 import proposalDynamicImport from "@babel/plugin-proposal-dynamic-import";
 import proposalJsonStrings from "@babel/plugin-proposal-json-strings";
 import proposalNullishCoalescingOperator from "@babel/plugin-proposal-nullish-coalescing-operator";
 import proposalNumericSeparator from "@babel/plugin-proposal-numeric-separator";
 import proposalObjectRestSpread from "@babel/plugin-proposal-object-rest-spread";
 import proposalOptionalCatchBinding from "@babel/plugin-proposal-optional-catch-binding";
 import proposalOptionalChaining from "@babel/plugin-proposal-optional-chaining";
+import proposalPrivateMethods from "@babel/plugin-proposal-private-methods";
 import proposalUnicodePropertyRegex from "@babel/plugin-proposal-unicode-property-regex";
 import transformAsyncToGenerator from "@babel/plugin-transform-async-to-generator";
 import transformArrowFunctions from "@babel/plugin-transform-arrow-functions";
@@ -66,15 +69,18 @@ export default {
   "bugfix/transform-safari-for-shadowing": bugfixSafariForShadowing,
   "bugfix/transform-tagged-template-caching": bugfixTaggedTemplateCaching,
   "proposal-async-generator-functions": proposalAsyncGeneratorFunctions,
+  "proposal-class-properties": proposalClassProperties,
   "proposal-dynamic-import": proposalDynamicImport,
   "proposal-json-strings": proposalJsonStrings,
   "proposal-nullish-coalescing-operator": proposalNullishCoalescingOperator,
   "proposal-numeric-separator": proposalNumericSeparator,
   "proposal-object-rest-spread": proposalObjectRestSpread,
   "proposal-optional-catch-binding": proposalOptionalCatchBinding,
   "proposal-optional-chaining": proposalOptionalChaining,
+  "proposal-private-methods": proposalPrivateMethods,
   "proposal-unicode-property-regex": proposalUnicodePropertyRegex,
   "syntax-async-generators": syntaxAsyncGenerators,
+  "syntax-class-properties": syntaxClassProperties,
   "syntax-dynamic-import": syntaxDynamicImport,
   "syntax-json-strings": syntaxJsonStrings,
   "syntax-nullish-coalescing-operator": syntaxNullishCoalescingOperator,

diff --git a/.../babel-preset-env/test/fixtures/debug/entry-corejs2-shippedProposals-chrome-71/stdout.txt b/.../babel-preset-env/test/fixtures/debug/entry-corejs2-shippedProposals-chrome-71/stdout.txt
@@ -9,6 +9,8 @@ Using modules transform: auto
 
 Using plugins:
   proposal-numeric-separator { "chrome":"71" }
+  proposal-class-properties { "chrome":"71" }
+  proposal-private-methods { "chrome":"71" }
   proposal-nullish-coalescing-operator { "chrome":"71" }
   proposal-optional-chaining { "chrome":"71" }
   syntax-json-strings { "chrome":"71" }

diff --git a/packages/babel-preset-env/test/fixtures/debug/entry-corejs2-shippedProposals/stdout.txt b/packages/babel-preset-env/test/fixtures/debug/entry-corejs2-shippedProposals/stdout.txt
@@ -7,6 +7,8 @@ Using modules transform: auto
 
 Using plugins:
   proposal-numeric-separator {}
+  proposal-class-properties {}
+  proposal-private-methods {}
   proposal-nullish-coalescing-operator {}
   proposal-optional-chaining {}
   proposal-json-strings {}

diff --git a/packages/babel-preset-env/test/fixtures/debug/entry-corejs3-all-chrome-71/stdout.txt b/packages/babel-preset-env/test/fixtures/debug/entry-corejs3-all-chrome-71/stdout.txt
@@ -9,6 +9,8 @@ Using modules transform: auto
 
 Using plugins:
   proposal-numeric-separator { "chrome":"71" }
+  proposal-class-properties { "chrome":"71" }
+  proposal-private-methods { "chrome":"71" }
   proposal-nullish-coalescing-operator { "chrome":"71" }
   proposal-optional-chaining { "chrome":"71" }
   syntax-json-strings { "chrome":"71" }

diff --git a/packages/babel-preset-env/test/fixtures/debug/entry-corejs3-all/stdout.txt b/packages/babel-preset-env/test/fixtures/debug/entry-corejs3-all/stdout.txt
@@ -7,6 +7,8 @@ Using modules transform: auto
 
 Using plugins:
   proposal-numeric-separator {}
+  proposal-class-properties {}
+  proposal-private-methods {}
   proposal-nullish-coalescing-operator {}
   proposal-optional-chaining {}
   proposal-json-strings {}

diff --git a/packages/babel-preset-env/test/fixtures/debug/entry-corejs3-babel-polyfill/stdout.txt b/packages/babel-preset-env/test/fixtures/debug/entry-corejs3-babel-polyfill/stdout.txt
@@ -7,6 +7,8 @@ Using modules transform: auto
 
 Using plugins:
   proposal-numeric-separator {}
+  proposal-class-properties {}
+  proposal-private-methods {}
   proposal-nullish-coalescing-operator {}
   proposal-optional-chaining {}
   proposal-json-strings {}

diff --git a/packages/babel-preset-env/test/fixtures/debug/entry-corejs3-es-chrome-71/stdout.txt b/packages/babel-preset-env/test/fixtures/debug/entry-corejs3-es-chrome-71/stdout.txt
@@ -9,6 +9,8 @@ Using modules transform: auto
 
 Using plugins:
   proposal-numeric-separator { "chrome":"71" }
+  proposal-class-properties { "chrome":"71" }
+  proposal-private-methods { "chrome":"71" }
   proposal-nullish-coalescing-operator { "chrome":"71" }
   proposal-optional-chaining { "chrome":"71" }
   syntax-json-strings { "chrome":"71" }

diff --git a/...ages/babel-preset-env/test/fixtures/debug/entry-corejs3-es-proposals-chrome-71/stdout.txt b/...ages/babel-preset-env/test/fixtures/debug/entry-corejs3-es-proposals-chrome-71/stdout.txt
@@ -9,6 +9,8 @@ Using modules transform: auto
 
 Using plugins:
   proposal-numeric-separator { "chrome":"71" }
+  proposal-class-properties { "chrome":"71" }
+  proposal-private-methods { "chrome":"71" }
   proposal-nullish-coalescing-operator { "chrome":"71" }
   proposal-optional-chaining { "chrome":"71" }
   syntax-json-strings { "chrome":"71" }

diff --git a/packages/babel-preset-env/test/fixtures/debug/entry-corejs3-es-proposals/stdout.txt b/packages/babel-preset-env/test/fixtures/debug/entry-corejs3-es-proposals/stdout.txt
@@ -7,6 +7,8 @@ Using modules transform: auto
 
 Using plugins:
   proposal-numeric-separator {}
+  proposal-class-properties {}
+  proposal-private-methods {}
   proposal-nullish-coalescing-operator {}
   proposal-optional-chaining {}
   proposal-json-strings {}

diff --git a/packages/babel-preset-env/test/fixtures/debug/entry-corejs3-es/stdout.txt b/packages/babel-preset-env/test/fixtures/debug/entry-corejs3-es/stdout.txt
@@ -7,6 +7,8 @@ Using modules transform: auto
 
 Using plugins:
   proposal-numeric-separator {}
+  proposal-class-properties {}
+  proposal-private-methods {}
   proposal-nullish-coalescing-operator {}
   proposal-optional-chaining {}
   proposal-json-strings {}

diff --git a/...ages/babel-preset-env/test/fixtures/debug/entry-corejs3-runtime-only-chrome-71/stdout.txt b/...ages/babel-preset-env/test/fixtures/debug/entry-corejs3-runtime-only-chrome-71/stdout.txt
@@ -9,6 +9,8 @@ Using modules transform: auto
 
 Using plugins:
   proposal-numeric-separator { "chrome":"71" }
+  proposal-class-properties { "chrome":"71" }
+  proposal-private-methods { "chrome":"71" }
   proposal-nullish-coalescing-operator { "chrome":"71" }
   proposal-optional-chaining { "chrome":"71" }
   syntax-json-strings { "chrome":"71" }

diff --git a/packages/babel-preset-env/test/fixtures/debug/entry-corejs3-runtime-only/stdout.txt b/packages/babel-preset-env/test/fixtures/debug/entry-corejs3-runtime-only/stdout.txt
@@ -9,6 +9,8 @@ Using modules transform: auto
 
 Using plugins:
   proposal-numeric-separator { "chrome":"71" }
+  proposal-class-properties { "chrome":"71" }
+  proposal-private-methods { "chrome":"71" }
   proposal-nullish-coalescing-operator { "chrome":"71" }
   proposal-optional-chaining { "chrome":"71" }
   syntax-json-strings { "chrome":"71" }

diff --git a/.../babel-preset-env/test/fixtures/debug/entry-corejs3-specific-entries-chrome-71/stdout.txt b/.../babel-preset-env/test/fixtures/debug/entry-corejs3-specific-entries-chrome-71/stdout.txt
@@ -9,6 +9,8 @@ Using modules transform: auto
 
 Using plugins:
   proposal-numeric-separator { "chrome":"71" }
+  proposal-class-properties { "chrome":"71" }
+  proposal-private-methods { "chrome":"71" }
   proposal-nullish-coalescing-operator { "chrome":"71" }
   proposal-optional-chaining { "chrome":"71" }
   syntax-json-strings { "chrome":"71" }

diff --git a/packages/babel-preset-env/test/fixtures/debug/entry-corejs3-specific-entries/stdout.txt b/packages/babel-preset-env/test/fixtures/debug/entry-corejs3-specific-entries/stdout.txt
@@ -7,6 +7,8 @@ Using modules transform: auto
 
 Using plugins:
   proposal-numeric-separator {}
+  proposal-class-properties {}
+  proposal-private-methods {}
   proposal-nullish-coalescing-operator {}
   proposal-optional-chaining {}
   proposal-json-strings {}

diff --git a/packages/babel-preset-env/test/fixtures/debug/entry-corejs3-stable-chrome-71/stdout.txt b/packages/babel-preset-env/test/fixtures/debug/entry-corejs3-stable-chrome-71/stdout.txt
@@ -9,6 +9,8 @@ Using modules transform: auto
 
 Using plugins:
   proposal-numeric-separator { "chrome":"71" }
+  proposal-class-properties { "chrome":"71" }
+  proposal-private-methods { "chrome":"71" }
   proposal-nullish-coalescing-operator { "chrome":"71" }
   proposal-optional-chaining { "chrome":"71" }
   syntax-json-strings { "chrome":"71" }

diff --git a/packages/babel-preset-env/test/fixtures/debug/entry-corejs3-stable-samsung-8.2/stdout.txt b/packages/babel-preset-env/test/fixtures/debug/entry-corejs3-stable-samsung-8.2/stdout.txt
@@ -9,6 +9,8 @@ Using modules transform: auto
 
 Using plugins:
   proposal-numeric-separator { "samsung":"8.2" }
+  proposal-class-properties { "samsung":"8.2" }
+  proposal-private-methods { "samsung":"8.2" }
   proposal-nullish-coalescing-operator { "samsung":"8.2" }
   proposal-optional-chaining { "samsung":"8.2" }
   proposal-json-strings { "samsung":"8.2" }

diff --git a/packages/babel-preset-env/test/fixtures/debug/entry-corejs3-stable/stdout.txt b/packages/babel-preset-env/test/fixtures/debug/entry-corejs3-stable/stdout.txt
@@ -7,6 +7,8 @@ Using modules transform: auto
 
 Using plugins:
   proposal-numeric-separator {}
+  proposal-class-properties {}
+  proposal-private-methods {}
   proposal-nullish-coalescing-operator {}
   proposal-optional-chaining {}
   proposal-json-strings {}

diff --git a/packages/babel-preset-env/test/fixtures/debug/entry-corejs3-stage-chrome-71/stdout.txt b/packages/babel-preset-env/test/fixtures/debug/entry-corejs3-stage-chrome-71/stdout.txt
@@ -9,6 +9,8 @@ Using modules transform: auto
 
 Using plugins:
   proposal-numeric-separator { "chrome":"71" }
+  proposal-class-properties { "chrome":"71" }
+  proposal-private-methods { "chrome":"71" }
   proposal-nullish-coalescing-operator { "chrome":"71" }
   proposal-optional-chaining { "chrome":"71" }
   syntax-json-strings { "chrome":"71" }

diff --git a/packages/babel-preset-env/test/fixtures/debug/entry-corejs3-stage/stdout.txt b/packages/babel-preset-env/test/fixtures/debug/entry-corejs3-stage/stdout.txt
@@ -7,6 +7,8 @@ Using modules transform: auto
 
 Using plugins:
   proposal-numeric-separator {}
+  proposal-class-properties {}
+  proposal-private-methods {}
   proposal-nullish-coalescing-operator {}
   proposal-optional-chaining {}
   proposal-json-strings {}

diff --git a/packages/babel-preset-env/test/fixtures/debug/entry-corejs3-web-chrome-71/stdout.txt b/packages/babel-preset-env/test/fixtures/debug/entry-corejs3-web-chrome-71/stdout.txt
@@ -9,6 +9,8 @@ Using modules transform: auto
 
 Using plugins:
   proposal-numeric-separator { "chrome":"71" }
+  proposal-class-properties { "chrome":"71" }
+  proposal-private-methods { "chrome":"71" }
   proposal-nullish-coalescing-operator { "chrome":"71" }
   proposal-optional-chaining { "chrome":"71" }
   syntax-json-strings { "chrome":"71" }

diff --git a/packages/babel-preset-env/test/fixtures/debug/entry-corejs3-web/stdout.txt b/packages/babel-preset-env/test/fixtures/debug/entry-corejs3-web/stdout.txt
@@ -7,6 +7,8 @@ Using modules transform: auto
 
 Using plugins:
   proposal-numeric-separator {}
+  proposal-class-properties {}
+  proposal-private-methods {}
   proposal-nullish-coalescing-operator {}
   proposal-optional-chaining {}
   proposal-json-strings {}

diff --git a/packages/babel-preset-env/test/fixtures/debug/entry-no-corejs-shippedProposals/stdout.txt b/packages/babel-preset-env/test/fixtures/debug/entry-no-corejs-shippedProposals/stdout.txt
@@ -7,6 +7,8 @@ Using modules transform: auto
 
 Using plugins:
   proposal-numeric-separator {}
+  proposal-class-properties {}
+  proposal-private-methods {}
   proposal-nullish-coalescing-operator {}
   proposal-optional-chaining {}
   proposal-json-strings {}

diff --git a/packages/babel-preset-env/test/fixtures/debug/shippedProposals-chrome-80/input.mjs b/packages/babel-preset-env/test/fixtures/debug/shippedProposals-chrome-80/input.mjs
@@ -0,0 +1 @@
+import '@babel/polyfill';
diff --git a/packages/babel-preset-env/test/fixtures/debug/shippedProposals-chrome-80/options.json b/packages/babel-preset-env/test/fixtures/debug/shippedProposals-chrome-80/options.json
@@ -0,0 +1,16 @@
+{
+  "validateLogs": true,
+  "ignoreOutput": true,
+  "presets": [
+    [
+      "env",
+      {
+        "debug": true,
+        "targets": {
+          "browsers": "chrome 80"
+        },
+        "shippedProposals": true
+      }
+    ]
+  ]
+}
diff --git a/packages/babel-preset-env/test/fixtures/debug/shippedProposals-chrome-80/stdout.txt b/packages/babel-preset-env/test/fixtures/debug/shippedProposals-chrome-80/stdout.txt
@@ -0,0 +1,23 @@
+@babel/preset-env: `DEBUG` option
+
+Using targets:
+{
+  "chrome": "80"
+}
+
+Using modules transform: auto
+
+Using plugins:
+  syntax-numeric-separator { "chrome":"80" }
+  syntax-class-properties { "chrome":"80" }
+  proposal-private-methods { "chrome":"80" }
+  syntax-nullish-coalescing-operator { "chrome":"80" }
+  syntax-optional-chaining { "chrome":"80" }
+  syntax-json-strings { "chrome":"80" }
+  syntax-optional-catch-binding { "chrome":"80" }
+  syntax-async-generators { "chrome":"80" }
+  syntax-object-rest-spread { "chrome":"80" }
+  transform-modules-commonjs { "chrome":"80" }
+  proposal-dynamic-import { "chrome":"80" }
+
+Using polyfills: No polyfills were added, since the `useBuiltIns` option was not set.
diff --git a/packages/babel-preset-env/test/fixtures/debug/shippedProposals-chrome-84/input.mjs b/packages/babel-preset-env/test/fixtures/debug/shippedProposals-chrome-84/input.mjs
@@ -0,0 +1 @@
+import '@babel/polyfill';
diff --git a/packages/babel-preset-env/test/fixtures/debug/shippedProposals-chrome-84/options.json b/packages/babel-preset-env/test/fixtures/debug/shippedProposals-chrome-84/options.json
@@ -0,0 +1,16 @@
+{
+  "validateLogs": true,
+  "ignoreOutput": true,
+  "presets": [
+    [
+      "env",
+      {
+        "debug": true,
+        "targets": {
+          "browsers": "chrome 84"
+        },
+        "shippedProposals": true
+      }
+    ]
+  ]
+}
diff --git a/packages/babel-preset-env/test/fixtures/debug/shippedProposals-chrome-84/stdout.txt b/packages/babel-preset-env/test/fixtures/debug/shippedProposals-chrome-84/stdout.txt
@@ -0,0 +1,22 @@
+@babel/preset-env: `DEBUG` option
+
+Using targets:
+{
+  "chrome": "84"
+}
+
+Using modules transform: auto
+
+Using plugins:
+  syntax-numeric-separator { "chrome":"84" }
+  syntax-class-properties { "chrome":"84" }
+  syntax-nullish-coalescing-operator { "chrome":"84" }
+  syntax-optional-chaining { "chrome":"84" }
+  syntax-json-strings { "chrome":"84" }
+  syntax-optional-catch-binding { "chrome":"84" }
+  syntax-async-generators { "chrome":"84" }
+  syntax-object-rest-spread { "chrome":"84" }
+  transform-modules-commonjs { "chrome":"84" }
+  proposal-dynamic-import { "chrome":"84" }
+
+Using polyfills: No polyfills were added, since the `useBuiltIns` option was not set.