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plugin-features.js
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plugin-features.js
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// WARNING: Plugin ordering is important. Don't reorder this file
// without checking that it doesn't break anything.
const es5 = {
"transform-member-expression-literals":
"Object/array literal extensions / Reserved words as property names",
"transform-property-literals":
"Object/array literal extensions / Reserved words as property names",
"transform-reserved-words": "Miscellaneous / Unreserved words",
};
// https://github.com/babel/babel/issues/11278
// transform-parameters should run before object-rest-spread
const es2015Parameter = {
"transform-parameters": {
features: [
"default function parameters",
"rest parameters",
"destructuring, parameters / aliased defaults, arrow function",
"destructuring, parameters / shorthand defaults, arrow function",
"destructuring, parameters / duplicate identifier",
],
},
};
const es2015 = {
"transform-template-literals": {
features: ["template literals"],
},
"transform-literals": {
features: ["Unicode code point escapes"],
},
"transform-function-name": {
features: ['function "name" property'],
},
"transform-arrow-functions": {
features: [
"arrow functions / 0 parameters",
"arrow functions / 1 parameter, no brackets",
"arrow functions / multiple parameters",
'arrow functions / lexical "this" binding',
'arrow functions / "this" unchanged by call or apply',
"arrow functions / can't be bound, can be curried",
'arrow functions / lexical "arguments" binding',
"arrow functions / no line break between params and <code>=></code>",
"arrow functions / correct precedence",
'arrow functions / no "prototype" property',
],
},
"transform-block-scoped-functions": {
features: ["block-level function declaration"],
},
"transform-classes": {
features: [
"class",
"super",
'arrow functions / lexical "super" binding in constructors',
'arrow functions / lexical "super" binding in methods',
],
},
"transform-object-super": {
features: ["super"],
},
"transform-shorthand-properties": {
features: ["object literal extensions / shorthand properties"],
},
"transform-duplicate-keys": {
features: ["miscellaneous / duplicate property names in strict mode"],
},
"transform-computed-properties": {
features: ["object literal extensions / computed properties"],
},
"transform-for-of": {
features: ["for..of loops"],
},
"transform-sticky-regex": {
features: [
'RegExp "y" and "u" flags / "y" flag, lastIndex',
'RegExp "y" and "u" flags / "y" flag',
],
},
"transform-unicode-escapes": "Unicode code point escapes",
"transform-unicode-regex": {
features: [
'RegExp "y" and "u" flags / "u" flag, case folding',
'RegExp "y" and "u" flags / "u" flag, Unicode code point escapes',
'RegExp "y" and "u" flags / "u" flag, non-BMP Unicode characters',
'RegExp "y" and "u" flags / "u" flag',
],
},
"transform-spread": {
features: [
"spread syntax for iterable objects",
// We need to compile classes when spread is not supported, because
// we cannot compile super(...args) without also rewriting the
// "super" handling. There is a bugfix that makes it better.
"class",
"super",
],
},
"transform-destructuring": {
features: ["destructuring, assignment", "destructuring, declarations"],
},
"transform-block-scoping": {
features: [
"const",
"let",
// regenerator-transform doesn't support let/const,
// so we must compile them when compiling generators.
"generators",
],
},
"transform-typeof-symbol": {
features: ["Symbol / typeof support"],
},
"transform-new-target": {
features: ["new.target", 'arrow functions / lexical "new.target" binding'],
},
"transform-regenerator": {
features: ["generators"],
},
};
const es2016 = {
"transform-exponentiation-operator": {
features: ["exponentiation (**) operator"],
},
};
const es2017 = {
"transform-async-to-generator": {
features: ["async functions"],
},
};
const es2018 = {
"transform-async-generator-functions": "Asynchronous Iterators",
"transform-object-rest-spread": "object rest/spread properties",
"transform-dotall-regex": "s (dotAll) flag for regular expressions",
"transform-unicode-property-regex": "RegExp Unicode Property Escapes / basic",
"transform-named-capturing-groups-regex": "RegExp named capture groups",
};
const es2019 = {
"transform-json-strings": "JSON superset",
"transform-optional-catch-binding": "optional catch binding",
};
const es2020 = {
"transform-nullish-coalescing-operator": "nullish coalescing operator (??)",
"transform-optional-chaining": "optional chaining operator (?.)",
};
const es2021 = {
"transform-numeric-separator": "numeric separators",
"transform-logical-assignment-operators": "Logical Assignment",
};
const es2022 = {
"bugfix/transform-v8-static-class-fields-redefine-readonly": {
features: ["static class fields / static class fields use [[Define]]"],
replaces: "transform-class-properties",
},
"bugfix/transform-firefox-class-in-computed-class-key": {
replaces: "transform-class-properties",
overwrite: {
// TODO: Once Firefox releases the fix, write the correct version here.
firefox: undefined,
},
},
"transform-class-static-block": "Class static initialization blocks",
"transform-private-property-in-object":
"Ergonomic brand checks for private fields",
"transform-class-properties": {
features: [
"static class fields",
"instance class fields / public instance class fields",
"instance class fields / private instance class fields basic support",
"instance class fields / computed instance class fields",
],
},
"transform-private-methods": "private class methods",
};
const es2024 = {
"transform-unicode-sets-regex": {
features: [
"RegExp `v` flag / set notations",
"RegExp `v` flag / properties of Strings",
"RegExp `v` flag / constructor supports it",
"RegExp `v` flag / shows up in flags",
],
},
};
const shippedProposal = {};
// Run plugins for modern features first
module.exports = Object.assign(
{},
shippedProposal,
es2024,
es2022,
es2021,
es2020,
es2019,
es2015Parameter,
es2018,
es2017,
es2016,
es2015,
es5
);