ECMAScriptの仕様/プロポーザルの調べ方を知る
このステージの詳細についてはThe TC39 Processを参照してください。 2ヶ月に1度行われるTC39のミーティングにおいて、プロポーザルごとにステージを進めるかどうかを議論します。 このミーティングの議事録もGitHub上のtc39/tc39-notesにて公開されています。 ステージ4となったプロポーザルはドラフト版であるtc39/ecma262へマージされます。 そして毎年の決まった時期にドラフト版を元にしてECMAScript 20XXとしてリリースします。 この仕様策定プロセスの変更は、ECMAScriptに含まれる機能の形にも影響しています。 たとえば、class構文の策定は最大限に最小のクラス（maximally minimal classes）と呼ばれる形で提案されています。 これによりES2015でclass構文が導入されましたが、クラスとして合意が取れる最低限の
Feature watch: ECMAScript 2018
Check out my book (free online): “Exploring ES2018 and ES2019”. Buy it now and get all future updates. The feature set of ECMAScript 2018 was finalized during the latest TC39 meeting (23-25 January 2018). This blog post describes it. A word on ECMAScript versions # Note that since the TC39 process was instituted, the importance of ECMAScript versions has much decreased. What really matters now is
GitHub - tc39/proposal-import-meta: import.meta proposal for JavaScript
This repository contains a proposal for adding an import.meta metaproperty to JavaScript, for holding host-specific metadata about the current module. It is currently in stage 4 of the TC39 process. Previously this problem space was discussed with the module-loading community in whatwg/html#1013. The result was a presentation at the May 2017 TC39 meeting of these slides. The committee's feedback a
ES proposal: Shared memory and atomics
The ECMAScript proposal “Shared memory and atomics” by Lars T. Hansen has reached stage 4 this week and will be part of ECMAScript 2017. It introduces a new constructor SharedArrayBuffer and a namespace object Atomics with helper functions. This blog post explains the details. Update 2017-02-24: Complete rewrite of Sect. 4, “Atomics: safely accessing shared data”. Parallelism vs. concurrency # Be
自分用async / await functionsメモ
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GitHub - zenparsing/es-cancel-token: Cancel Tokens for ECMAScript
Asynchronous APIs frequently need to provide the user with some way to cancel long running or expensive operations. Some examples: A browser HTTP fetch API needs to allow the user to cancel network operations if the current request is no longer required by the user interface. A database access API needs to allow the user to cancel a long-running query when the client no longer needs the results of
Cancelable promises
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GitHub - tc39/proposal-decorators: Decorators for ES6 classes
Decorators have three primary capabilities: They can replace the value that is being decorated with a matching value that has the same semantics. (e.g. a decorator can replace a method with another method, a field with another field, a class with another class, and so on). They can provide access to the value that is being decorated via accessor functions which they can then choose to share. They
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GitHub - tc39/proposal-destructuring-private: A proposal integrate private fields and destructuring
ECMAScript Language Specification Comparator
GitHub - syg/standard-library-task-group: Standard Library Task Group for TC39
GitHub - nodejs/dynamic-modules: Dynamic Modules Proposal for ECMAScript
GitHub - rbuckton/proposal-statements-as-expressions: Proposal to explore Statements as Expressions
Remove `export-ns-from` since it moved to https://github.com/tc39/ecm… · tc39/proposals@77d957b
GitHub - tc39/proposal-intl-relative-time: `Intl.RelativeTimeFormat` specification [draft]![GitHub - tc39/proposal-intl-relative-time: `Intl.RelativeTimeFormat` specification [draft]](https://cdn-ak-scissors.b.st-hatena.com/image/square/250768a8a533567c02053cf3babcf2d13569f2ce/backend=imagemagick;height=288;version=1;width=512/https%3A%2F%2Fopengraph.githubassets.com%2Fedf457e01d8c7124f3026c69dc1301bde21886b12b8b5858dc27d51c65dd68a2%2Ftc39%2Fproposal-intl-relative-time)
tc39-notes/may-23.md at master · rwaldron/tc39-notes · GitHub
GitHub - leurfete/proposal-date-time-string-format: An amended Date Time String Format with more explicit syntax.
Per May 2016 TC39 consensus, `String#{padStart,padEnd}` is now stage 4! by ljharb · Pull Request #581 · tc39/ecma262
set SourceText internal slots by michaelficarra · Pull Request #90 · tc39/proposal-async-await
GitHub - tc39/proposal-ptc-syntax: Discussion and specification for an explicit syntactic opt-in for Tail Calls.
