ESLint v6.2.0 - Qiita
前 v6.1.0 | 次 v6.3.0 ESLint 6.2.0 has been released: https://t.co/L7srPm1jkE This release adds support for parsing ES2020 features (bigint, dynamic import) using the default parser! Please give it a try and let us know if you see any issues. — ESLint (@geteslint) August 18, 2019 ESLint 6.2.0 がリリースされました。 お盆休み中に ESTree 仕様が更新されたので、BigInt と Dynamic Imports 構文をサポートしました。 既知の問題: babel-eslintを利用している場合、変数の利
JavaScript Primer - 迷わないための入門書 #jsprimer
JavaScript Primer 迷わないための入門書 Tweet Watch Star Twitterのハッシュタグ: #jsprimer これからJavaScriptを学びたい人が、ECMAScript 2015以降をベースにして一からJavaScriptを学べる書籍です。 プログラミングをやったことがあるが、今のJavaScriptがよくわからないという人が、 今のJavaScriptアプリケーションを読み書きできるように書かれています。 初めてのプログラミング言語としてJavaScriptを学ぶ人は、まずは「はじめに」から読んでみてください。 書籍版 このウェブサイトの内容はアスキードワンゴから書籍として出版されています。 書籍版の内容はウェブサイト版と同一ですが、本として読めるように最適化されています。 書籍版は次のサイトから購入できます。 Amazon 達人出版会（電子書籍版
ECMAScript® 2018 Language Specification
Introduction1 Scope2 Conformance3 Normative References◢4 Overview4.1 Web Scripting◢4.2 ECMAScript Overview4.2.1 Objects4.2.2 The Strict Variant of ECMAScript◢4.3 Terms and Definitions4.3.1 type4.3.2 primitive value4.3.3 object4.3.4 constructor4.3.5 prototype4.3.6 ordinary object4.3.7 exotic object4.3.8 standard object4.3.9 built-in object4.3.10 undefined value4.3.11 Undefined type4.3.12 null value
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
ECMA-414 ECMAScript Specification Suiteについて
ECMA-414 ECMAScript Specification SuiteというECMAScript関係の仕様をまとめたEcma仕様が公開されている。 背景については以下を参照。 For ECMA-262 (the main ECMAWScript standard), we now have an agreement with ISO that we will not fast track it anymore; instead, the ECMAScript Suite ECMA-414 will supercede it (with normative references also to the needed Ecma standards), and the other redundant standard ISO IS 16262 (which is out of date)
Int64
This document discusses proposals for implementing value objects in JavaScript. Some key points include: - Value objects could represent common types like integers, floats, and SIMD vectors, as well as mathematical constructs like big numbers, decimals, and complexes. - Overloadable operators like +, -, *, / would allow defining behaviors for mathematical operations on different value object types
ES2018: asynchronous iteration
Warning: This blog post is outdated. Instead, read chapter “Asynchronous iteration” in “JavaScript for impatient programmers”. This blog post explains the ECMAScript proposal “Asynchronous Iteration” by Domenic Denicola and Kevin Smith. It has reached stage 4 on 2018-01-25 and is part of ECMAScript 2018. Asynchronous iteration # With ECMAScript 6, JavaScript got built-in support for synchronously
standards/reports/TC39/2016-07.md at master · JSFoundation/standards
The last TC39 Meeting was hosted by Microsoft in Redmond, WA, USA. They have an enormous and beautiful campus there and the weather helped TC39 to have some productive discussions. The agenda was a bit long with some items that didn't find time in the previous meeting. The good news is that most of the items got solved. I have to repeat the same statement from my last report: As this report is not
ECMAScript® 2016 Language Specification
Introduction1 Scope2 Conformance3 Normative References◢4 Overview4.1 Web Scripting◢4.2 ECMAScript Overview4.2.1 Objects4.2.2 The Strict Variant of ECMAScript◢4.3 Terms and Definitions4.3.1 type4.3.2 primitive value4.3.3 object4.3.4 constructor4.3.5 prototype4.3.6 ordinary object4.3.7 exotic object4.3.8 standard object4.3.9 built-in object4.3.10 undefined value4.3.11 Undefined type4.3.12 null value
async関数が実装された - JS.next
概要 非同期な処理を同期的に書ける関数タイプが実装された。 基本 「async」キーワードに続けて関数定義を書くと、async関数となる。 async function afn1() { } afn2 = async () => { } obj = { async afn3() { } } async関数を呼び出すとプロミスが返される。 console.log( afn1() ) // <Promise> このプロミスは、async関数が終了するとその返り値で解決され、例外が起こると棄却される。 async function afn4( flag ) { if ( flag ) return 'Yes' else throw 'No' } afn4( true ).then( v => console.log( v ) ) /// "Yes" afn4( false ).catch( v
Previewing ES6 Modules and more from ES2015, ES2016 and beyond
Chakra, the recently open-sourced JavaScript engine that powers Microsoft Edge and Universal Windows applications, has been pushing the leading edge of ECMAScript language support. Most of ES2015 (aka ES6) language support is already available in Edge, and last week’s Windows Insider Preview build 14342 brings more ES6 capabilities including modules, default parameters, and destructuring. We’re n
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GitHub - tc39/proposal-regexp-unicode-sequence-properties: Proposal to add support for sequence properties in Unicode property escapes to ECMAScript regular expressions.
eslint-plugin-es
Add `s` (dotAll) flag for regular expressions by adrianheine · Pull Request #634 · acornjs/acorn
Comparing 2758419e7d46ad118ede749824ea5ab81e510572...master · tc39/proposals
GitHub - tc39/proposal-pattern-matching: Pattern matching syntax for ECMAScript
GitHub - tc39/proposal-bigint: Arbitrary precision integers in JavaScript
GitHub - tc39/proposal-regexp-lookbehind: RegExp lookbehind assertions
Async functions and await expressions by mysticatea · Pull Request #446 · acornjs/acorn
GitHub - tc39/proposals: Tracking ECMAScript Proposals
