Normative: Remove [[Enumerate]] and associated reflective capabilities by bterlson · Pull Request #367 · tc39/ecma262
Summary of changes (actually quite simple so I expect I'm missing something major :-P) 6.1.7.2 Removed [[Enumerate]] from the table and list of invariants 9.5 Proxy Object Internal Methods and Interal Slots, [[Enumerate]] table entry removed. 9.4.6.1.1 Module Namespace Object [[Enumerate]] deleted 9.5.11 Proxy [[Enumerate]] deleted Moved ordinary [[Enumerate]] section to end of 13.7.5 for-in, rena
![Normative: Remove [[Enumerate]] and associated reflective capabilities by bterlson · Pull Request #367 · tc39/ecma262](https://cdn-ak-scissors.b.st-hatena.com/image/square/357378314a96b7147e4612e4b49c705a33120243/backend=imagemagick;height=288;version=1;width=512/https%3A%2F%2Fopengraph.githubassets.com%2Fd48a9e143c17d6f8495fcb9aa25b2cb9f29d081566c1b865e021c144cd5ca6e8%2Ftc39%2Fecma262%2Fpull%2F367)
ECMA-262 6th (ES 2015) のモジュールについて (入門編) - ひだまりソケットは壊れない
はじめに ECMA-262 6th がリリースされて ECMAScript (JavaScript) にモジュールの機能が導入されたわけですが、実際どんなものなのかはっきりわかってなかったので ECMA-262 6th を読んでみました。 このブログ記事はそのまとめです。 実践的な話 (TypeScript でモジュールの機能を使うことについてや、既存プロジェクトへのモジュールの導入など) はまた今度書くつもりです。 この文書では歴史的背景などには触れずに坦々と ECMA-262 を読んでいくだけですので、歴史的背景などを含めた解説を読みたい方は最後に挙げている関連ページなどを読むと良いと思います。 ECMA-262 6th を読む ECMA-262 6th (ECMAScript 2015 Language Specification) の中で、モジュールに関して述べられているところを引
What does ReturnIfAbrupt mean in ES6 draft?
I'm currently implementing some shims for the ES6 draft. I'm wondering if anyone can tell me what ReturnIfAbrupt means. For instance, my implementation for Number.toInt (which calls internal [[ToInteger]] is as follows: if (!('toInt' in Number)) Object.defineProperty(Number, 'toInt', { value: function toInt(value) { // ECMA-262 Ed. 6, 9-27-12. 9.1.4 // 1. Let number be the result of calling ToNumb
Add <script type="module"> and module resolution/fetching/evaluation by domenic · Pull Request #443 · whatwg/html
This adds support for <script type="module"> for loading JavaScript modules, as well as all the infrastructure necessary for resolving, fetching, parsing, and evaluating module graphs rooted at such <script type="module">s. This was spurred on by a request over in whatwg/loader#83 (comment). This should take care of whatwg/loader#83, whatwg/loader#84, and whatwg/loader#82. There is not much overla
Release ES2016 Draft 2015-12-10 · tc39/ecma262
Normative Changes Add Array.prototype.includes and TypedArray.prototype.includes. Relaxed ordering constraint in EnumerableOwnNames to allow implementation-defined ordering for objects that don't have ordinary objects' [[Enumerate]] slot (notably, proxies, for which the previous constraint was impossible to guarantee). The order that arguments objects' caller and callee properties are created is r
Release ES2016 Draft 2015-12-01 · tc39/ecma262
Normative Changes Promise.all and Promise.race no longer use @@ species to construct a new instance. RegExp.prototype.[[@@ split]] now coerces limit using ToUint32. This was erroneously changed in ES6 to use ToLength which could result in broken array indexes. Add new early error for functions which contain both a non-simple parameter list and a use strict directive (Notes: here and here). Binding
The TC39 process for ECMAScript features
This blog post explains the so-called TC39 process, which governs how ECMAScript features are designed, starting with ECMAScript 2016 (ES7). Related blog posts: The final feature set of ECMAScript 2016 (ES7) Feature watch: ECMAScript 2017 Who designs ECMAScript? # Answer: TC39 (Technical Committee 39). TC39 is the committee that evolves JavaScript. Its members are companies (among others, all maj
ECMASCript2015 Language Specificationの5章 - Qiita
Deleted articles cannot be recovered. Draft of this article would be also deleted. Are you sure you want to delete this article? 綺麗にまとめようと思っていたら、かなり時間が空いてしまったので、もう公開しちゃえ！ ECMASCript2015 Language Specificationの一人輪読会資料。 今回は5章からスタート。 サマリ 文脈自由文法について 生成規則（productions）の集合で文・言語を表現 生成規則は左辺が非終端記号、右辺が0個以上の非終端記号または終端記号 本仕様には4つの文法がある 字句文法（Lexical Grammar） ソースコード → ECMAScriptトークン 正規表現文法（RegExp Grammar) 数値文字列の文
Security consideration: Multi-threading helps cache-based side channel attacks · Issue #1 · lars-t-hansen/ecmascript_sharedmem · GitHub
Shared memory allows the construction of a high-resolution timer (nanosecond resolution), which enables cache-based side channel attacks, such as those described in the paper "The Spy in the Sandbox -- Practical Cache Attacks in Javascript" (http://arxiv.org/abs/1502.07373). For example, key press handling code produces a detectable signature of accesses to L3 cache sets. An attacker can use timin
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Normative: Add Exponentiation Operator · tc39/ecma262@28bdf07
brian@m.terlson.net on Twitter: "Exponentiation operator is in for ES2016! Congrats @rwaldron, `awesome ** 2`!"
brian@m.terlson.net on Twitter: "ES2016 will likely not contain async functions. Do not despair! Implementations are still coming regardless."
Definition for frontmatter id tags · Issue #477 · tc39/test262
Editorial: new algorithm convention for return-if-abrupt by bterlson · Pull Request #129 · tc39/ecma262
GitHub - wycats/javascript-private-state: A proposal for private state in JavaScript (Stage 0)
ecma262/FAQ.md at main · tc39/ecma262
Destructuring declarations that bind nothing should probably be an early error · Issue #97 · tc39/ecma262
Release ES2016 Draft 2015-10-19 · tc39/ecma262
module-metadata.md
GitHub - tc39/ecma262-6-src: This is the source code and tools used to create the ECMAScript 2015 Language Specification
