new Date("wtf")All questions verified using NodeJS 24.4.0 on a MacBook Pro set to the BST timezone (UTC+1). Start Quiz
Prettier 3.6: Experimental fast CLI and new OXC and Hermes plugins! · Prettier
This release includes several important feature additions that we're excited to share with you. First, we're shipping a new experimental high-performance CLI behind a feature flag (--experimental-cli). This CLI was previously only available in prettier@next, but now you can enable it simply by using a flag. We encourage you to try it out and share your feedback! If you are interested in the intern
Biome v2—codename: Biotype
We are happy to announce that Biome v2 is officially out! 🍾 Biome v2—codename: Biotype, the first JavaScript and TypeScript linter that provides type-aware linting rules that doesn’t rely on the TypeScript compiler! This means that you can lint your project without necessarily installing the typescript package. With this release, the Core Contributors of the project want to show to the whole comm
Nova
Welcome!Nova is a JavaScript (ECMAScript) and WebAssembly engine written in Rust and following data-oriented design principles. It is currently nothing more than a fun experiment to learn and to prove the viability of such an engine, but may very well become something much more in the future. The engine is still very limited in it's capabilities only passing about 48% of the test262 test suite. Ho
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Why are 2025/05/28 and 2025-05-28 different days in JavaScript? 2025-05-28 While setting up this site itself, I ran into the following oddity: console.log(new Date('2025/05/28').toDateString()); // Wed May 28 2025 console.log(new Date('2025-05-28').toDateString()); // Tue May 27 2025 // Bonus: (omit leading 0) console.log(new Date('2025-5-28').toDateString()); // Wed May 28 2025 You may get differ
DeepIntoDev | In-Depth Software Development Insights
In the world of software development, filled with frameworks, libraries, and abstractions, I often felt like I was just using technologies without truly understanding them. So, I started digging deeper—reading more, researching, and questioning everything. That’s why I created this blog: to break down complex programming concepts into simpler, easy-to-understand explanations. Explore the Most Popu
Bare | Fast, Lightweight Runtime for Modular JavaScript Apps
Bare is a small and modular JavaScript runtime for desktop and mobile. Like Node.js, it provides an asynchronous, event-driven architecture for writing applications in the lingua franca of modern software. Unlike Node.js, it makes embedding and cross-device support core use cases, aiming to run just as well on your phone as on your laptop. The result is a runtime ideal for networked, peer-to-peer
On JavaScript's Weirdness - Stack Auth
“JavaScript sucks because '0' == 0!” - literally everyone ever Sure, that part of JavaScript sucks, but every JS setup these days contains a linter that yells at you for code like that. Instead, I want to talk about some of the weirder quirks of JavaScript — those that are much more insidious than that — the kind of stuff you wouldn't find on r/ProgrammerHumor or a JS tutorial. All of them can occ
Could JavaScript have synchronous `await`?
In JavaScript, code has color: It is either synchronous or asynchronous. In this blog post, we explore: The problems caused by that How to fix them via synchronous await The two downsides that prevent synchronous await from being practical The problems of asynchronous code being different from synchronous code # The key problem is that synchronous code can’t call asynchronous code. On one hand th
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V8’s end-tier optimizing compiler, Turbofan, is famously one of the few large-scale production compilers to use Sea of Nodes (SoN). However, since almost 3 years ago, we’ve started to get rid of Sea of Nodes and fall back to a more traditional Control-Flow Graph (CFG) Intermediate Representation (IR), which we named Turboshaft. By now, the whole JavaScript backend of Turbofan uses Turboshaft inste
JavaScriptがブラウザでどのように動くのか | メルカリエンジニアリング
実際にコードを用いてスタック領域とヒープ領域の概念を説明します。 person オブジェクトを宣言した時、JavaScript エンジンはオブジェクトの実体をヒープ領域にメモリ割り当てを行い、ヒープ領域にある実体への参照をスタック領域にメモリ割り当てを行います。 const person = { name: 'Taro', age: 24 }; 次のように新しい変数(newPerson)に再代入をすると参照がコピーされ、newPerson も person もヒープ領域に割り当てられた同じ実体に対する参照を持ちます。 const newPerson = person; Object.assign を使って新しいオブジェクトを生成するのは、参照コピーをしないための方法の一つで、よく使われる手法の1つです。 function getName(person) { return person.na
フロントエンドで日時処理と戦うために 2025 ver
JSConf.jp おかわり Node学園46時限目 - https://nodejs.connpass.com/event/344588/ X - https://twitter.com/sajikix
Temporal APIの現在地（2025年2月時点）
はじめに Temporal APIは、一言で要約すると「JavaScriptの日付・時間の処理をまともにする」ためのプロポーザル(仕様提案)です。 この記事では、Temporalについて「今どういう状態なのか」「今すぐ使うにはどうすればいいのか」「今すぐ使う場合に注意すべきことは何か」といった情報を提供します。 仕様 Temporalは現在stage 3です。 2024年6〜9月にかけて巨大な仕様変更(normative change)があったものの、2025年現在Temporalは仕様として「ほぼ完成」しています。2つ以上のJavaScript処理系に実装され次第stage 4になり、ES202xとして標準化される予定です。 ドキュメント 最近、MDNにTemporal関連のドキュメントが一気に追加されました。リファレンスとしてはこれを見るのがいいでしょう。 また、プロポーザルのドキュメ
Web における Beacon の変遷 (sendBeacon(), fetch() keepalive, fetchLater()) | blog.jxck.io
Intro ページを閉じる際に何かしらの情報をサーバで収集したいケースがある。 これを Beacon の送信(Beaconing)と呼び、ブラウザではページ表示中に収集したパフォーマンス統計の収集や、広告タグによるトラッキングなどに用いられる。 しかし、「ページが閉じる直前に、サーバにリクエストを送信する」を確実に実行するのは実は難しく、これを標準技術で実現する過程で、複数の API が生まれるに至った。 各 API の策定経緯と、挙動の違いについて解説していく。 <img> での送信 最もプリミティブな Beacon の送信は、<img> を用いたものだった。 window.addEventListener("unload", () => { const beaconImage = new Image(1, 1); beaconImage.src = "https://telemetry
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GitHub - aymericzip/intlayer: Internationalisation solution for JS application focusing on scalability. Make your JavaScript / TypeScript application multilingue.
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