Web Streams API 入門 ― 基本概念から実践まで
こんにちは、tasshi です。 この記事では、JavaScriptでストリーム処理を行うための標準API「Web Streams API（Streams API）」について、基本概念から実践的な使い方、Node.js Streamとの違いまでを解説します。 本記事は、TSKaigi 2025で発表した「Web Streams APIの基本と実践、TypeScriptでの活用法」をベースに、現在のブラウザ対応状況などを踏まえて記事として再構成したものです。 ストリームとは何か Web Streams APIの話に入る前に、まず「ストリーム」という概念について整理します。 ストリームとは、データ入出力を逐次的に、効率よく扱うためのデータ構造です。 データをより細かく分割された単位（チャンク）の連続した流れとして表現します。 ストリーム自体は昔からある概念で、多くの開発言語でストリーム操作のイ
Cloudflare Workers and Containers now support inbound TCP connections and gRPC
August 3, 2026Cloudflare Workers and Containers now support inbound TCP connections and gRPC AI is changing how people interact with computers, and voice is becoming an increasingly important part of that shift. Real-time assistants, AI-powered dictation, and other voice interfaces need low-latency communication between clients, models, and supporting services. Many developers use gRPC, a Remote P
Your Worker can now have its own cache in front of it
Your Worker can now have its own cache in front of it2026-07-06 Today we are launching Workers Cache: a tiered cache that sits in front of your Worker, configured by a single line of Wrangler config and the same Cache-Control headers you already know. When Workers Cache is enabled, every cacheable request to your Worker hits Cloudflare's cache first. If there's a fresh cached response, Cloudflare
On Rendering Diffs
ON RENDERING DIFFS Posted on May 29, 2026 by @amadeus ██████╗ ██╗███████╗███████╗███████╗ ██╔══██╗██║██╔════╝██╔════╝██╔════╝ ██████████╗ ██║ ██║██║█████╗ █████╗ ███████╗ ╚═════════╝ ██║ ██║██║██╔══╝ ██╔══╝ ╚════██║ ██████╔╝██║██║ ██║ ███████║ ╚═════╝ ╚═╝╚═╝ ╚═╝ ╚══════╝ ██╗ ██████╗ ██╗███████╗███████╗███████╗ ██║ ██╔══██╗██║██╔════╝██╔════╝██╔════╝ ██████████╗ ██║ ██║██║█████╗ █████╗ ███████╗ ╚══
9 Times the Web Platform Was Influenced by Libraries | Jad Joubran
The web platform didn't invent most of its best APIs. It caught up to them. Libraries did the R&D work in production. They got tested by thousands of developers across thousands of codebases, which is the kind of feedback you can't simulate. They got bug reports. They iterated. And, the patterns that survived eventually became part of the platform itself. If you've been writing JavaScript for a wh
Cleaning up import paths in JS/TS packages - Socket
Cleaning up import paths in JS/TS packagespackage.json contains a local aliasing mechanism for import paths called "imports" it satisfies many use cases without tooling specific solutions like tsconfig.json Applications and libraries grow over time. In JavaScript and TypeScript these lead to large amounts of files over time due to various conventions and linting rules that may be held in a code ba
The Intl API: The best browser API you're not using | Polypane
Chances are you've used Moment.js, date-fns, Luxon, or numeral.js at some point. Developers have relied on these libraries for years to format dates, numbers, and currencies. Those are all very useful libraries, but they also come with a cost: they add kilobytes to your download size and they require client-side code parsing: LibrarySizeMoment.js295 kBdate-fns77 kBluxon.js82 kBnumeral.js11 kBThe I
Signals, the push-pull based algorithm — Willy Brauner
We have been using Signals in production for years via several modern front-end frameworks like Solid, Vue, and others, but few of us are able to explain how they work internally. I wanted to dig into it, especially diving deep into the push-pull based algorithm, the core mechanism behind their reactivity. The subject is fascinating. The state of the world Imagine an application as a world where w
Scroll Restoration | TanStack Router Docs
Hash/Top-of-Page Scrolling# Out of the box, TanStack Router supports both hash scrolling and top-of-page scrolling without any additional configuration. Scroll-to-top & Nested Scrollable Areas# By default, scroll-to-top mimics the behavior of the browser, which means only the window itself is scrolled to the top after successful navigation. For many apps however, it's common for the main scrollabl
External import maps, today! • Lea Verou
A few weeks ago, I posted Web dependencies are broken. Can we fix them?. Today’s post is a little less gloomy: Turns out that the major limitation that would allow centralized set-it-and-forget-it import map management can be lifted today, with excellent browser support! The core idea is that you can use DOM methods to inject an import map dynamically, by literally creating an <script type="import
Temporal: The 9-Year Journey to Fix Time in JavaScript
Welcome to our blog! I'm Jason Williams, a senior software engineer on Bloomberg's JavaScript Infrastructure and Terminal Experience team. Today the Bloomberg Terminal runs a lot of JavaScript. Our team provides a JavaScript environment to engineers across the company. Bloomberg may not be the first company you think of when discussing JavaScript. It certainly wasn't for me in 2018 before I worked
Writing Good Unit Tests
In my first job as a software engineer the project I was working on grew out of control. As often happens, use cases were added without proper refactoring and with more users we were drowning in support tickets and nothing seemed to work. It was clear we needed to push for quality so we started adding unit tests. The tech lead at the time mandated high test coverage. But here's the reality: writin
JSer.info 15周年: 15年間のJavaScriptを振り返る
2011年1月16日に開始したJSer.infoは、2026年1月16日で15周年を迎えました🎉 JSer.infoは15年間で820件の記事を公開し、13,606件のサイト/記事/ライブラリを紹介してきました。週1回の更新を15年間継続しています。 この記事では、15年間のJSer.infoのデータを振り返りながら、JavaScriptエコシステムがどのように変化してきたかを見ていきます。 なお、この記事のデータはJSer.infoで紹介した記事の傾向であり、JavaScriptエコシステム全体を示すものではありません。 また、2024-2025年はJSer.info自体の投稿数が減少しているため、データにも2025年に減少傾向が出てしまっている点に注意してください。 15年間の基本統計 項目 数値 総投稿数 820回 総紹介記事数 13,606件 運営期間 2011年1月〜2026年
Introducing: React Best Practices - Vercel
We've encapsulated 10+ years of React and Next.js optimization knowledge into react-best-practices, a structured repository optimized for AI agents and LLMs. React performance work is usually, well, reactive. A release goes out, the app feels slower, and the team starts chasing symptoms. That’s expensive, and it’s easy to optimize the wrong thing. We’ve seen the same root causes across production
Streaming JSON in just 200 lines of JavaScript
I was continueing my exploration of React server components when I stumbled upon on this article about progressive JSON. Dan Abramov describes a technique for streaming JSON from a server to a client in chunks, allowing the client to start rendering parts of the data before the entire payload has been received. This can significantly improve perceived performance, especially for large datasets. So
How to compile JavaScript to C with Static Hermes
12/29/2025 Lately, I've been working on porting more of Parcel to Rust. One of the challenges with Rust-based tools is how to support plugins. Many of the most common tools already have Rust-based equivalents: SWC and OXC for JavaScript, Lightning CSS for CSS, oxvg for SVG, etc. But other popular tools like React Compiler, Less, and Sass, are still written in JavaScript, so we need a way to run th
The many, many, many JavaScript runtimes of the last decade
This last decade has seen an inundation of new JavaScript runtimes (and engines in equal measure), enabling us to run JavaScript in all manner of contexts with precise fitness for task. Through these, we've seen the language spread to the Cloud, the edge, Smart TVs, mobile devices, and even microcontrollers. In this article, we'll explore what's driving this diversity, and why no one runtime or en
第三者のJavaScriptをセキュアに実行するには？― exaBase Studio のプラグイン機能
メリークリスマス🎄 Studio Application 開発グループの吉田です。 エクサウィザーズのAdvent Calendar 25日目、最終日です！ exaBase Studio に Figma みたいなプラグイン機能を入れたい これはけっこう前からずっと頭の片隅にあったアイデアでした。 exaBase Studio（エクサベース スタジオ）はアプリケーション開発基盤ですが、Figma のようなキャンバス画面を持っています。キャンバスを読み書きできるプラグインをユーザー自身が自由に開発できれば、Studioの機能を拡張することができます。 exaBase Studio とは exaBase Studio は、エクサウィザーズが提供するクラウドネイティブな AI サービス開発環境です。GUI でシステム設計ができ、ワンクリックで Kubernetes ベースの本番環境を自動構築でき
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Flow has been ported to Rust | Flow
Third Parties and Single Points of Failure