| ## Proposed language features |
| # |
| # This project accepts tests for language proposals that have reached stage 3 |
| # in TC39's standardization process. Those tests should be annotated with a |
| # dedicated feature flag so that consumers may more easily omit them as |
| # necessary. |
| # |
| # https://github.com/tc39/process-document |
| |
| # Missing checks in Proxy internal methods |
| # https://github.com/tc39/ecma262/pull/666 |
| proxy-missing-checks |
| |
| # Promise.allSettled |
| # https://github.com/tc39/proposal-promise-allSettled |
| Promise.allSettled |
| |
| # Hashbang Grammar |
| # https://github.com/tc39/proposal-hashbang |
| hashbang |
| |
| # Object.fromEntries |
| # https://github.com/tc39/proposal-object-from-entries |
| Object.fromEntries |
| |
| # BigInt |
| # https://github.com/tc39/proposal-bigint |
| BigInt |
| |
| # Class Fields |
| # https://github.com/tc39/proposal-class-fields |
| class-fields-public |
| class-fields-private |
| |
| # Class Static Fields & Methods |
| # https://github.com/tc39/proposal-static-class-features/ |
| class-static-fields-public |
| class-static-fields-private |
| class-static-methods-private |
| |
| # Class Private methods and getter/setters |
| # https://github.com/tc39/proposal-private-methods |
| class-methods-private |
| |
| # Dynamic Import |
| # https://github.com/tc39/proposal-dynamic-import |
| dynamic-import |
| |
| # Array.prototype.flat and Array.prototype.flatMap |
| # https://github.com/tc39/proposal-flatMap |
| Array.prototype.flat |
| Array.prototype.flatMap |
| |
| # String Trimming |
| # https://github.com/tc39/proposal-string-left-right-trim |
| # Includes all tests for: |
| # String.prototype.{trimStart, trimEnd, trimLeft, trimRight} |
| string-trimming |
| String.prototype.trimEnd |
| String.prototype.trimStart |
| |
| # Numeric Separator Literal |
| # https://github.com/tc39/proposal-numeric-separator |
| numeric-separator-literal |
| |
| # String.prototype.matchAll |
| # https://github.com/tc39/proposal-string-matchall |
| String.prototype.matchAll |
| Symbol.matchAll |
| |
| # Symbol.prototype.description |
| # https://github.com/tc39/proposal-symbol-description |
| Symbol.prototype.description |
| |
| # Well-formed JSON.stringify |
| # https://github.com/tc39/proposal-well-formed-stringify |
| well-formed-json-stringify |
| |
| # Intl.ListFormat |
| # https://github.com/tc39/proposal-intl-list-format |
| Intl.ListFormat |
| |
| # Intl.Locale |
| # https://github.com/tc39/proposal-intl-locale |
| Intl.Locale |
| |
| # Intl.RelativeTimeFormat |
| # https://github.com/tc39/proposal-intl-relative-time |
| Intl.RelativeTimeFormat |
| |
| # Intl.Segmenter |
| # https://github.com/tc39/proposal-intl-segmenter |
| Intl.Segmenter |
| |
| # Intl.NumberFormat unified proposal |
| # https://github.com/sffc/proposal-unified-intl-numberformat |
| Intl.NumberFormat-unified |
| |
| # Intl.DateTimeFormat: dateStyle and timeStyle options |
| # https://github.com/tc39/proposal-intl-datetime-style |
| Intl.DateTimeFormat-datetimestyle |
| |
| # Intl.DateTimeFormat: formatRange and formatRangeToParts functions |
| # https://github.com/tc39/proposal-intl-DateTimeFormat-formatRange |
| Intl.DateTimeFormat-formatRange |
| |
| # Intl.DateTimeFormat: add 'dayPeriod' option |
| # https://github.com/tc39/ecma402/pull/346 |
| Intl.DateTimeFormat-dayPeriod |
| |
| # Intl.DateTimeFormat: add 'quarter' option |
| # https://github.com/tc39/ecma402/pull/346 |
| Intl.DateTimeFormat-quarter |
| |
| # Intl.DateTimeFormat: add 'fractionalSecondDigits' option |
| # https://github.com/tc39/ecma402/pull/347 |
| Intl.DateTimeFormat-fractionalSecondDigits |
| |
| # Intl "normative optional" |
| # https://tc39.es/ecma402/#legacy-constructor |
| intl-normative-optional |
| |
| # Global |
| # https://github.com/tc39/proposal-global |
| globalThis |
| |
| # `export * as namespace from module` |
| # https://github.com/tc39/ecma262/pull/1174 |
| export-star-as-namespace-from-module |
| |
| # import.meta |
| # https://github.com/tc39/proposal-import-meta |
| import.meta |
| |
| # WeakRef |
| # https://github.com/tc39/proposal-weakref |
| WeakRef |
| FinalizationRegistry |
| |
| # FinalizationRegistry#cleanupSome |
| # link pending |
| FinalizationRegistry.prototype.cleanupSome |
| cleanupSome |
| |
| # Optional Chaining |
| # https://github.com/tc39/proposal-optional-chaining |
| optional-chaining |
| |
| # Top Level Await |
| # https://github.com/tc39/proposal-top-level-await |
| top-level-await |
| |
| # RegExp Match Array Indices |
| # https://github.com/tc39/proposal-regexp-match-indices |
| regexp-match-indices |
| |
| # Nullish Coalesce Expression |
| # https://github.com/tc39/proposal-nullish-coalescing |
| coalesce-expression |
| |
| # Intl.DisplayNames |
| # https://github.com/tc39-transfer/proposal-intl-displaynames |
| Intl.DisplayNames |
| |
| # Promise.any |
| # https://github.com/tc39/proposal-promise-any |
| Promise.any |
| AggregateError |
| |
| # String.prototype.replaceAll |
| # https://github.com/tc39/proposal-string-replaceall |
| String.prototype.replaceAll |
| |
| # Enumeration order for for-in |
| # https://github.com/tc39/proposal-for-in-order |
| for-in-order |
| |
| # Legacy RegExp features |
| # https://github.com/tc39/proposal-regexp-legacy-features |
| legacy-regexp |
| |
| # Logical Assignment Operators |
| # https://github.com/tc39/proposal-logical-assignment |
| logical-assignment-operators |
| |
| # Atomics.waitAsync |
| # https://github.com/tc39/proposal-atomics-wait-async |
| Atomics.waitAsync |
| |
| # Item Method |
| # https://github.com/tc39/proposal-item-method |
| Array.prototype.at |
| String.prototype.at |
| TypedArray.prototype.at |
| |
| # Arbitrary module namespace names |
| # https://github.com/tc39/ecma262/pull/2154 |
| arbitrary-module-namespace-names |
| |
| # Align detached buffer semantics with web reality |
| # https://github.com/tc39/ecma262/pull/2164 |
| align-detached-buffer-semantics-with-web-reality |
| |
| ## Standard language features |
| # |
| # Language features that have been included in a published version of the |
| # ECMA-262 specification. These flags are largely maintained for historical |
| # reasons, though their use for relatively new features (i.e. prior to |
| # availability across major implementations) is appreciated. |
| |
| ArrayBuffer |
| Array.prototype.values |
| arrow-function |
| async-iteration |
| async-functions |
| Atomics |
| caller |
| class |
| computed-property-names |
| const |
| cross-realm |
| DataView |
| DataView.prototype.getFloat32 |
| DataView.prototype.getFloat64 |
| DataView.prototype.getInt16 |
| DataView.prototype.getInt32 |
| DataView.prototype.getInt8 |
| DataView.prototype.getUint16 |
| DataView.prototype.getUint32 |
| DataView.prototype.setUint8 |
| default-parameters |
| destructuring-assignment |
| destructuring-binding |
| for-of |
| Float32Array |
| Float64Array |
| generators |
| Int8Array |
| Int16Array |
| Int32Array |
| json-superset |
| let |
| Map |
| new.target |
| object-rest |
| object-spread |
| Object.is |
| optional-catch-binding |
| Promise |
| Promise.prototype.finally |
| Proxy |
| Reflect |
| Reflect.construct |
| Reflect.set |
| Reflect.setPrototypeOf |
| regexp-dotall |
| regexp-lookbehind |
| regexp-named-groups |
| regexp-unicode-property-escapes |
| rest-parameters |
| Set |
| SharedArrayBuffer |
| String.fromCodePoint |
| String.prototype.endsWith |
| String.prototype.includes |
| super |
| Symbol |
| Symbol.asyncIterator |
| Symbol.hasInstance |
| Symbol.isConcatSpreadable |
| Symbol.iterator |
| Symbol.match |
| Symbol.replace |
| Symbol.search |
| Symbol.species |
| Symbol.split |
| Symbol.toPrimitive |
| Symbol.toStringTag |
| Symbol.unscopables |
| tail-call-optimization |
| template |
| TypedArray |
| u180e |
| Uint8Array |
| Uint16Array |
| Uint32Array |
| Uint8ClampedArray |
| WeakMap |
| WeakSet |
| __proto__ |
| __getter__ |
| __setter__ |
| |
| ## Test-Harness Features |
| # |
| # The rare cases where testing language functionality requires non-standard |
| # language features, exposed through global-environment functions on the $262 |
| # object, go here. |
| |
| IsHTMLDDA |
| host-gc-required |