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perf: lazy load preset-env plugins (#13076)
1 parent a647b9e commit 3e174e9

3 files changed

Lines changed: 75 additions & 66 deletions

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‎babel.config.js‎

Lines changed: 5 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -179,7 +179,11 @@ module.exports = function (api) {
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assumptions: parserAssumptions,
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},
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convertESM && {
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test: ["./packages/babel-cli", "./packages/babel-core"].map(normalize),
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test: [
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"./packages/babel-cli",
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"./packages/babel-core",
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"./packages/babel-preset-env/src/available-plugins.js",
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].map(normalize),
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plugins: [
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// Explicitly use the lazy version of CommonJS modules.
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["@babel/transform-modules-commonjs", { lazy: true }],

‎packages/babel-preset-env/src/available-plugins.js‎

Lines changed: 69 additions & 64 deletions
Original file line numberDiff line numberDiff line change
@@ -68,68 +68,73 @@ import bugfixSafariForShadowing from "@babel/preset-modules/lib/plugins/transfor
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import bugfixV8SpreadParametersInOptionalChaining from "@babel/plugin-bugfix-v8-spread-parameters-in-optional-chaining";
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export default {
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"bugfix/transform-async-arrows-in-class": bugfixAsyncArrowsInClass,
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"bugfix/transform-edge-default-parameters": bugfixEdgeDefaultParameters,
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"bugfix/transform-edge-function-name": bugfixEdgeFunctionName,
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"bugfix/transform-safari-block-shadowing": bugfixSafariBlockShadowing,
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"bugfix/transform-safari-for-shadowing": bugfixSafariForShadowing,
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"bugfix/transform-tagged-template-caching": bugfixTaggedTemplateCaching,
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"bugfix/transform-v8-spread-parameters-in-optional-chaining": bugfixV8SpreadParametersInOptionalChaining,
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"proposal-async-generator-functions": proposalAsyncGeneratorFunctions,
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"proposal-class-properties": proposalClassProperties,
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"proposal-dynamic-import": proposalDynamicImport,
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"proposal-export-namespace-from": proposalExportNamespaceFrom,
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"proposal-json-strings": proposalJsonStrings,
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"proposal-logical-assignment-operators": proposalLogicalAssignmentOperators,
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"proposal-nullish-coalescing-operator": proposalNullishCoalescingOperator,
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"proposal-numeric-separator": proposalNumericSeparator,
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"proposal-object-rest-spread": proposalObjectRestSpread,
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"proposal-optional-catch-binding": proposalOptionalCatchBinding,
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"proposal-optional-chaining": proposalOptionalChaining,
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"proposal-private-methods": proposalPrivateMethods,
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"proposal-unicode-property-regex": proposalUnicodePropertyRegex,
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"syntax-async-generators": syntaxAsyncGenerators,
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"syntax-class-properties": syntaxClassProperties,
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"syntax-dynamic-import": syntaxDynamicImport,
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"syntax-export-namespace-from": syntaxExportNamespaceFrom,
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"syntax-json-strings": syntaxJsonStrings,
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"syntax-logical-assignment-operators": syntaxLogicalAssignmentOperators,
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"syntax-nullish-coalescing-operator": syntaxNullishCoalescingOperator,
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"syntax-numeric-separator": syntaxNumericSeparator,
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"syntax-object-rest-spread": syntaxObjectRestSpread,
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"syntax-optional-catch-binding": syntaxOptionalCatchBinding,
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"syntax-optional-chaining": syntaxOptionalChaining,
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"syntax-top-level-await": syntaxTopLevelAwait,
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"transform-arrow-functions": transformArrowFunctions,
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"transform-async-to-generator": transformAsyncToGenerator,
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"transform-block-scoped-functions": transformBlockScopedFunctions,
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"transform-block-scoping": transformBlockScoping,
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"transform-classes": transformClasses,
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"transform-computed-properties": transformComputedProperties,
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"transform-destructuring": transformDestructuring,
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"transform-dotall-regex": transformDotallRegex,
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"transform-duplicate-keys": transformDuplicateKeys,
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"transform-exponentiation-operator": transformExponentialOperator,
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"transform-for-of": transformForOf,
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"transform-function-name": transformFunctionName,
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"transform-literals": transformLiterals,
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"transform-member-expression-literals": transformMemberExpressionLiterals,
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"transform-modules-amd": transformModulesAmd,
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"transform-modules-commonjs": transformModulesCommonjs,
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"transform-modules-systemjs": transformModulesSystemjs,
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"transform-modules-umd": transformModulesUmd,
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"transform-named-capturing-groups-regex": transformNamedCapturingGroupsRegex,
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"transform-new-target": transformNewTarget,
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"transform-object-super": transformObjectSuper,
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"transform-parameters": transformParameters,
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"transform-property-literals": transformPropertyLiterals,
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"transform-regenerator": transformRegenerator,
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"transform-reserved-words": transformReservedWords,
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"transform-shorthand-properties": transformShorthandProperties,
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"transform-spread": transformSpread,
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"transform-sticky-regex": transformStickyRegex,
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"transform-template-literals": transformTemplateLiterals,
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"transform-typeof-symbol": transformTypeofSymbol,
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"transform-unicode-escapes": transformUnicodeEscapes,
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"transform-unicode-regex": transformUnicodeRegex,
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"bugfix/transform-async-arrows-in-class": () => bugfixAsyncArrowsInClass,
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"bugfix/transform-edge-default-parameters": () => bugfixEdgeDefaultParameters,
73+
"bugfix/transform-edge-function-name": () => bugfixEdgeFunctionName,
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"bugfix/transform-safari-block-shadowing": () => bugfixSafariBlockShadowing,
75+
"bugfix/transform-safari-for-shadowing": () => bugfixSafariForShadowing,
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"bugfix/transform-tagged-template-caching": () => bugfixTaggedTemplateCaching,
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"bugfix/transform-v8-spread-parameters-in-optional-chaining": () =>
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bugfixV8SpreadParametersInOptionalChaining,
79+
"proposal-async-generator-functions": () => proposalAsyncGeneratorFunctions,
80+
"proposal-class-properties": () => proposalClassProperties,
81+
"proposal-dynamic-import": () => proposalDynamicImport,
82+
"proposal-export-namespace-from": () => proposalExportNamespaceFrom,
83+
"proposal-json-strings": () => proposalJsonStrings,
84+
"proposal-logical-assignment-operators": () =>
85+
proposalLogicalAssignmentOperators,
86+
"proposal-nullish-coalescing-operator": () =>
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proposalNullishCoalescingOperator,
88+
"proposal-numeric-separator": () => proposalNumericSeparator,
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"proposal-object-rest-spread": () => proposalObjectRestSpread,
90+
"proposal-optional-catch-binding": () => proposalOptionalCatchBinding,
91+
"proposal-optional-chaining": () => proposalOptionalChaining,
92+
"proposal-private-methods": () => proposalPrivateMethods,
93+
"proposal-unicode-property-regex": () => proposalUnicodePropertyRegex,
94+
"syntax-async-generators": () => syntaxAsyncGenerators,
95+
"syntax-class-properties": () => syntaxClassProperties,
96+
"syntax-dynamic-import": () => syntaxDynamicImport,
97+
"syntax-export-namespace-from": () => syntaxExportNamespaceFrom,
98+
"syntax-json-strings": () => syntaxJsonStrings,
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"syntax-logical-assignment-operators": () => syntaxLogicalAssignmentOperators,
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"syntax-nullish-coalescing-operator": () => syntaxNullishCoalescingOperator,
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"syntax-numeric-separator": () => syntaxNumericSeparator,
102+
"syntax-object-rest-spread": () => syntaxObjectRestSpread,
103+
"syntax-optional-catch-binding": () => syntaxOptionalCatchBinding,
104+
"syntax-optional-chaining": () => syntaxOptionalChaining,
105+
"syntax-top-level-await": () => syntaxTopLevelAwait,
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"transform-arrow-functions": () => transformArrowFunctions,
107+
"transform-async-to-generator": () => transformAsyncToGenerator,
108+
"transform-block-scoped-functions": () => transformBlockScopedFunctions,
109+
"transform-block-scoping": () => transformBlockScoping,
110+
"transform-classes": () => transformClasses,
111+
"transform-computed-properties": () => transformComputedProperties,
112+
"transform-destructuring": () => transformDestructuring,
113+
"transform-dotall-regex": () => transformDotallRegex,
114+
"transform-duplicate-keys": () => transformDuplicateKeys,
115+
"transform-exponentiation-operator": () => transformExponentialOperator,
116+
"transform-for-of": () => transformForOf,
117+
"transform-function-name": () => transformFunctionName,
118+
"transform-literals": () => transformLiterals,
119+
"transform-member-expression-literals": () =>
120+
transformMemberExpressionLiterals,
121+
"transform-modules-amd": () => transformModulesAmd,
122+
"transform-modules-commonjs": () => transformModulesCommonjs,
123+
"transform-modules-systemjs": () => transformModulesSystemjs,
124+
"transform-modules-umd": () => transformModulesUmd,
125+
"transform-named-capturing-groups-regex": () =>
126+
transformNamedCapturingGroupsRegex,
127+
"transform-new-target": () => transformNewTarget,
128+
"transform-object-super": () => transformObjectSuper,
129+
"transform-parameters": () => transformParameters,
130+
"transform-property-literals": () => transformPropertyLiterals,
131+
"transform-regenerator": () => transformRegenerator,
132+
"transform-reserved-words": () => transformReservedWords,
133+
"transform-shorthand-properties": () => transformShorthandProperties,
134+
"transform-spread": () => transformSpread,
135+
"transform-sticky-regex": () => transformStickyRegex,
136+
"transform-template-literals": () => transformTemplateLiterals,
137+
"transform-typeof-symbol": () => transformTypeofSymbol,
138+
"transform-unicode-escapes": () => transformUnicodeEscapes,
139+
"transform-unicode-regex": () => transformUnicodeRegex,
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};

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

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -81,7 +81,7 @@ function getPluginList(proposals: boolean, bugfixes: boolean) {
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}
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const getPlugin = (pluginName: string) => {
84-
const plugin = availablePlugins[pluginName];
84+
const plugin = availablePlugins[pluginName]();
8585

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if (!plugin) {
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throw new Error(

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