test262/features.txt

# 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

# 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

# Static Class Fields & Methods:
# https://github.com/tc39/proposal-static-class-features/
class-static-fields-public
class-static-fields-private
class-static-methods-private

# Private methods and getter/setters
# https://github.com/tc39/proposal-private-methods
class-methods-private

# Promise.prototype.finally
# https://github.com/tc39/proposal-promise-finally
Promise.prototype.finally

# Async Iteration and Generators
# https://github.com/tc39/proposal-async-iteration
async-iteration
Symbol.asyncIterator

# Object rest/spread properties
# https://github.com/tc39/proposal-object-rest-spread
object-rest
object-spread

# Optional Catch Binding
# https://github.com/tc39/proposal-optional-catch-binding
optional-catch-binding

# RegExp s (dotAll) flag
# https://github.com/tc39/proposal-regexp-dotall-flag
regexp-dotall

# RegExp lookBehind
# https://github.com/tc39/proposal-regexp-lookbehind
regexp-lookbehind

# RegExp named groups capturing
# https://github.com/tc39/proposal-regexp-named-groups
regexp-named-groups

# RegExp Unicode Property Escapes
# https://github.com/tc39/proposal-regexp-unicode-property-escapes
regexp-unicode-property-escapes

# Shared Memory and atomics
# https://github.com/tc39/ecmascript_sharedmem
Atomics
SharedArrayBuffer

# 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

# ECMAScript ⊃ JSON
# https://github.com/tc39/proposal-json-superset
json-superset

# 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

# Global
# https://github.com/tc39/proposal-global
globalThis

# `export * as namespace from module` consensus PR
# https://github.com/tc39/ecma262/pull/1174
export-star-as-namespace-from-module

# 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-functions
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
Int32Array
let
Map
new.target
Object.is
Proxy
Reflect
Reflect.construct
Reflect.set
Reflect.setPrototypeOf
Set
String.fromCodePoint
String.prototype.endsWith
String.prototype.includes
super
Symbol
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
Uint8ClampedArray
WeakMap
WeakSet

# Test-harness features requiring host environment/test runner support
#
# The rare cases where testing language functionality requires non-standard
# language features, exposed through global-environment functions on the $262
# object, go here.

IsHTMLDDA