ECMAScript - Proposals for Future Editions

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

script - unit tests

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
global ref

Stage 2

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

Stage 1

String.prototype: matchAll() ref
Math extensions: clamp(), scale(), radians(), degrees(), RAD_PER_DEG, DEG_PER_RAD ref
Set/Map/WeakSet/WeakMap .of() and .from() ref

Stage 0

String.prototype.at() ref
64-bit Math: imulh(), umulh(), iaddh(), isubh() ref

See also:

Int64

Obsolete/Abandoned Proposals

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