GitHub - tc39/proposal-change-array-by-copy: Provides additional methods on Array.prototype and TypedArray.prototype to enable changes on the array by returning a new copy of it with the change.You signed in with another tab or window. Reload to refresh your session. You signed out in another tab or window. Reload to refresh your session. You switched accounts on another tab or window. Reload to refresh your session. Dismiss alert
Snowpack v3.0
Snowpack v3.0 is here! This is our biggest release yet with brand new features including: Pre-bundled streaming imports - Import any npm package, on-demand.Integrated build optimizations - Built-in bundling, preloading, minification, and more.JavaScript API - Integrate with Snowpack’s brand new native JS API.Node.js Runtime API - Import your Snowpack-built files directly into Node.js.Bug fixes, st
ep78 TC39 | mozaic.fm
Theme 第 78 回のテーマは TC39 です。 今回は Prettier のメンテなや Babel のコントリビュータをやりながら、TC39 の新しいプロポーサルをそれらに実装する作業をしている @\_\_sosukesuzuki をゲストにお呼びし、Prettier/Babel のメンテナンスの話などを交え、TC39 のウォッチの仕方や、気になる Proposal の話、ES2021 の展望を議論しながら、今後の ES や TC39 について議論しました。 Show Note Prettier - Opinionated Code Formatter Babel - The compiler for next generation JavaScript Web 技術の調査方法 | blog.jxck.io TC39 tc39/proposals tc39/agendas tc39/
ESM>CDN
Create modern(es2015+) web apps easily with NPM packages in browser/deno.No build tools needed!import confetti from "https://esm.sh/canvas-confetti@1.6.0" esm.sh allows you to import JavaScript modules from http URLs, no installation/build steps needed. import * as mod from "https://esm.sh/PKG[@SEMVER][/PATH]"; With import maps, you can even use bare import specifiers instead of URLs: <script type
GitHub - guybedford/es-module-lexer: Low-overhead lexer dedicated to ES module parsing for fast analysis
import { init, parse } from 'es-module-lexer'; (async () => { await init; const source = ` import { name } from 'mod\\u1011'; import json from './json.json' with { type: 'json' } export var p = 5; export function q () { }; export { x as 'external name' } from 'external'; // Comments provided to demonstrate edge cases import /*comment!*/ ( 'asdf', { with: { type: 'json' }}); import /*comment!*/.met
GitHub - wessberg/cjstoesm: A tool that can transform CommonJS to ESM
This is a tool that converts CommonJS modules into tree-shakeable ES Modules. This allows you to not only bundle CommonJS modules for the browser, but also makes it possible for you to bundle them in modern tools such as Rollup. It can also be used as a tool for migrating a CommonJS-based codebase to one based on ES-modules via a simple CLI. cjstoesm can be used from the Command Line, as a JavaScr
【翻訳】Date and Times in JavaScript - from scratch
この記事は littledan から依頼を受けて、翻訳しています。広く Date and Times の JS プロポーザルについて意見がほしいとのことです。 意見は以下の場所にポストできます。 docs.google.com 原文: blogs.igalia.com tl;dr: Temporal のプロポーザルについてフィードバックを求めています。 Polyfill を試したら、サーベイの回答を送ってください、ただしまだ本番環境では使わないでもらいたいです。 JavaScript の Date クラスは壊れています、しかし Breaking the Web を起こさずに修正する方法はありません。風のうわさでは、 Date クラスは 10 日で作られた JS Engine のhackに含まれたもので、 java.util.Date に基づいたものと言われています。しかも java.uti
Dates and Times in JavaScript
tl;dr: We are looking for feedback on the Temporal proposal. Try out the polyfill, and complete the survey; but don't use it in production yet! JavaScript Date is broken in ways that cannot be fixed without breaking the web. As the story goes, it was included in the original 10-day JavaScript engine hack and based on java.util.Date, which itself was deprecated in 1997 due to being a terrible API a
SES support for ECMAScript modules
SES v0.8.0Up to this point, SES has supported evaluating scripts in the SES runtime. Since every non-trivial application has many modules, running an application previously required creating a script bundle with a tool like Browserify. We’re excited to announce the first release of SES that directly supports loading ECMAScript modules. This is the first in a series of milestones toward delivering
A New RegExp Engine in SpiderMonkey – Mozilla Hacks - the Web developer blog
Background: RegExps in SpiderMonkey Regular expressions – commonly known as RegExps – are a powerful tool in JavaScript for manipulating strings. They provide a rich syntax to describe and capture character information. They’re also heavily used, so it’s important for SpiderMonkey (the JavaScript engine in Firefox) to optimize them well. Over the years, we’ve had several approaches to RegExps. Con
iframe の中で ES Modules のコードを評価する
rollup のような ESM を吐くツールのプレビューツールを作っていると、文字列として組み立てたコードを安全に評価したいことがあります。 方法 iframe を createObjectURL dynamic import で data uri として文字列を評価 得られた関数を実行 コード // これを評価したい const code = `export default () => { console.log("xxx") }`; // 追記:2020/06/24 ユニコード文字対応 const encoded = btoa(unescape(encodeURIComponent(code))); const blob = new Blob( [ `<!DOCTYPE html> <html> <head> </head> <body> <script type=module> im
What's new in ECMAScript 2020
ECMAScript 2020, the 11th installment of our favorite programming language, contains a handful of new features. Some are small ones, but others have the potential to change forever the way we write JavaScript. This article is an attempt at a short and concise overview of those new features. Grab your cup of tea and let's go. Dynamic import() ES2015 introduced the static import syntax. Now you coul
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Intent to Ship: import maps (inline only)
JavaScript 中文兴趣组
Operator Lookup - Search JavaScript Operators
GitHub - Lunuy/iterable-weak: Iterable WeakSet / WeakMap using ES2021 WeakRef
Release 2.0.0: ECMAScript 2020対応 · js-primer/js-primer
Release Version 8.0.0 · acornjs/acorn
GitHub - loilo/composite-symbol: ✳️ Map a series of values to a unique JavaScript Symbol
JScript Deviations from ES3