ECMAScript Proposal Diff between 2018 - 2019.

2018-2019.md

ECMAScript Proposal Diff between 2018-02-01 - 2019-02-01 by ECMAScript Proposal Diff Tool

• tc39-notes/es9 at master · rwaldron/tc39-notes
• agendas/2018 at master · tc39/agendas
• agendas/2019 at master · tc39/agendas

This changes is related with ECMAScript 2019 discussion.

New Proposals

Proposal	Stage
Object.fromEntries	4
Well-formed JSON.stringify	4
Hashbang Grammar	3
ArrayBuffer.prototype.transfer	2
RegExp Match array offsets	2
Sequence properties in Unicode property escapes	2
Promise.allSettled	2
collection normalization	2
Richer Keys	1
Slice notation	1
Logical Assignment Operators	1
Module Keys	1
Class Static Block	1
class Access Expressions	1
Explicit Resource Management	1
Dynamic Modules	1
JavaScript Standard Library	1
"use module"	1
for-in mechanics	1
uniform parsing of quasi-standard Date.parse input	1
JSON.parse source text access	1
IDL for ECMAScript	1
Asset References	1
deprecated	0
as destructuring patterns	0
Symbol.thenable	0
Promise.any	0

Updated Proposals

Proposal	From	To
Optional catch binding	3	4
JSON superset	3	4
Symbol.prototype.description	2	4
Function.prototype.toString revision	3	4
String.prototype.{trimStart,trimEnd}	3	4
Array.prototype.{flat,flatMap}	3	4
Static class fields and private static methods	2	3
Numeric separators	3	2
WeakRefs	1	2
Top-level await	1	2
Function.prototype.toString() censorship	1	2
New Set methods	1	2
Realms	1	2
Temporal	1	2
Pattern Matching	0	1

Stalled Proposals

Proposal	From	To	Last meeting
globalThis	3	3	2018-11
import()	3	3	2016-11
Legacy RegExp features in JavaScript	3	3	2017-05
BigInt	3	3	2018-05
import.meta	3	3	2017-09
Private instance methods and accessors	3	3	2018-09
Class Public Instance Fields & Private Instance Fields	3	3	2018-09
String.prototype.matchAll	3	3	2018-09
function.sent metaproperty	2	2	2015-11
Decorators	2	2	2018-11
throw expressions	2	2	2018-01
Atomics.waitAsync	2	2	2017-09
export v from "mod"; statements	1	1	2017-07
Observable	1	1	2017-05
Frozen Realms	1	1	2018-03
Math Extensions	1	1	2016-07
of and from on collection constructors	1	1	2016-09
Generator arrow functions (=>*)	1	1	2016-09
Promise.try	1	1	2016-11
Optional Chaining	1	1	2018-11
Math.signbit: IEEE-754 sign bit	1	1	2017-05
Error stacks	1	1	2017-01
do expressions	1	1	2018-07
Float16 on TypedArrays, DataView, Math.hfround	1	1	2017-05
Change Number.parseInt/parseFloat to not coerce null/undefined/NaN (repo link TBD)	1	1	2017-07
Binary AST	1	1	2018-05
Pipeline Operator	1	1	2018-03
Extensible numeric literals	1	1	2017-09
First-class protocols	1	1	2018-07
Nullish coalescing Operator	1	1	2018-03
Partial application	1	1	2018-07
Cancellation API	1	1	2018-07
String.prototype.replaceAll	1	1	2017-11
String.prototype.codePoints	1	1	2018-05
Object.freeze + Object.seal syntax	1	1	2017-11
Block Params	1	1	2017-11
{BigInt,Number}.fromString	1	1	2018-01
Math.seededRandoms()	1	1	2018-01
Maximally minimal mixins	1	1	2018-01
Getting last element of Array	1	1	2018-01
Collection methods	1	1	2018-01
Additional metaproperties	0	0	No Data
Annex B — HTML Attribute Event Handlers	0	0	No Data
Defensible Classes	0	0	No Data
Function bind syntax	0	0	2015-03
Function expression decorators	0	0	No Data
Method parameter decorators	0	0	No Data
Nested import declarations	0	0	2016-07
Normative ICU Reference	0	0	2017-05
Orthogonal Classes	0	0	2017-03
Reflect.{isCallable,isConstructor}	0	0	No Data
Relationships	0	0	No Data
String.prototype.at	0	0	No Data
Structured Clone	0	0	2014-01
WHATWG URL	0	0	No Data
Zones	0	0	2016-03
Object Shorthand Improvements	0	0	2017-09
Decimal	0	0	2017-11