ECMAScript - Proposals for Future Editions

Per https://github.com/tc39/ecma262

script - unit tests

In ECMAScript 2016

Array.prototype.includes() ref

Stage 4 (In drafts for ECMAScript 2017)

Object iterators: Object.values(), Object.entries() ref
String padding: padStart(), padEnd() ref
Object.getOwnPropertyDescriptors ref

See Finished Proposals

Stage 3

See also:

SIMD - see https://github.com/tc39/ecmascript_simd/blob/master/src/ecmascript_simd.js

Stage 2

String prototype: trimStart(), trimEnd() ref (and trimLeft(), trimRight() aliases)

Stage 1

String.prototype: matchAll() ref

Stage 0

String.prototype.at() ref

See also:

Int64

Informal Proposals

Number: compare()
Array prototype: pushAll()
Reflection: Object.getPropertyDescriptor(o), Object.getPropertyNames(o)