fidzu : JavaScript

#​774 - February 24, 2026

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JavaScript Weekly

Oxfmt Beta: A Fast, Rust-Powered JavaScript Code Formatter - A 100% Prettier-compatible JavaScript code formatter (and sister project of Oxlint) that boasts being 30x faster than Prettier and 3x faster than Biome. Since the alpha, it now supports embedded language formatting (JSX, YAML, HTML, etc), Tailwind CSS class sorting, import sorting, and more.

Boshen, Dunqing, and Sugiura (VoidZero)

FlexGrid by Wijmo: The Industry-Leading JavaScript Datagrid - A fast and flexible DataGrid for building modern web apps. Key features and virtualized rendering are included in the core grid module. Pick & choose special features to keep your app small. Built for JavaScript, extended to Angular, React, and Vue.

Wijmo From MESCIUS sponsor

IN BRIEF:

• Martin Kleppe, known for his creative experiments like tixy.land, has created a scrolling bitmap quine in just 666 characters of HTML and JavaScript. Here's the annotated source so you can see how it works.

• In the Oracle vs Deno JavaScript trademark case, Oracle has asked for a two month extension to proceedings, which Deno has agreed to.

• Patrick Brosset notes that, as of last month's release of Firefox 147, you can now use JS modules in service workers on all major browsers.

• A cute technical trick for using the browser's canvas element to compress textual data from JavaScript.

RELEASES:

• Vuetify 4.0 - Vue framework for building responsive UIs. (Upgrade docs.)

• npm v11.10.0 - Maintainers can now add/update trusted publishing configs across multiple packages simultaneously. There's also a new --min-release-age option.

• Node.js v25.7.0 (Current) and v24.14.0 (LTS)

• ESLint 10.0.2, Hono 4.12, Deno 2.6.10, Electron 40.6, Three.js r183

📖 Articles and Videos

The Fastest Frontend Tooling for Humans and AI - Christoph (of Jest fame) covers his preferred tools for getting your JavaScript tool stack running as fast as possible. It's also intended for LLMs to process via this Markdown version.

Christoph Nakazawa

Goodbye innerHTML, Hello setHTML for Stronger XSS Protection - As of v148, Firefox supports the Sanitizer API. Rather than assigning HTML to DOM nodes with innerHTML, you can use setHTML for safety by default. It's a cutting-edge feature, with Chrome 146 (beta) also adding support, but nothing in Safari yet, so DOMPurify will remain useful for a while.

Mozilla Hacks

Clerk's Free Tier Now Covers 50,000 MRUs - Up from 10K. MFA included in Pro. Unlimited apps on all plans. No per-app upgrades anymore.

Clerk sponsor

Halving Node.js Memory Usage with Pointer Compression - Cloudflare, Igalia, and the Node project have collaborated on node-caged, a Node.js 25 Docker image with V8 pointer compression enabled, yielding up to 50% memory savings. Matteo digs into all the details.

Matteo Collina

📺 My Angular Stack in 2026 - An opinionated walk through tools the author would pick if starting a new Angular project now. Rainer Hahnekamp

📄 How to Publish to npm from GitHub Actions - Using the new npm OIDC trusted publishing workflow. Gleb Bahmutov

📄 Building an Endless Procedural Snake with Three.js and WebGL Sujen Phea

🛠 Code & Tools

OpenSeadragon 6.0: A Web Viewer for High Resolution Images - A big step forward for a project that's almost 15 years old, and one of few stable, trusty options for rendering ultra-high resolution images for users to zoom into and pan around. Version 6 introduces a new async and cache-managed pipeline, making it far more efficient at scale.

OpenSeadragon Contributors

💡 OpenSeadragon was recently used as the basis for the Isometric NYC (well worth reading about in its own right!) project.

SurveyJS: JavaScript Libraries for Dynamic Web Forms - Build JSON-driven forms in your app (React/Angular/Vue) without SaaS limitations. Keep full ownership of your data.

SurveyJS sponsor

bignumber.js 10.0: Library for Arbitrary-Precision Arithmetic - Works around limitations of JavaScript's Number and BigInt types, such as if you need to work with very large non-integers. Usefully, the library is included on the page so you can play with it in the JS console.

Michael Mclaughlin

⏳ Slowmo: Slow Down, Pause, or Speed Up Time - A tool you can use either as a library or browser extension that slows down time in the browser for debugging and testing purposes. It slows down numerous things including CSS animations, transitions, and requestAnimationFrame.

Francois Laberge

React Doctor: Give Your React Code a Quick Check-Up - Fresh from the creator of React Scan and React Grab, a new tool that scans your codebase and gives you a 0-100 score. (GitHub repo.)

Aiden Bai

💡 Angular Doctor is a similar project for Angular apps inspired by React Doctor.

Vue Scrollama 3.0: Vue Component for Scroll-Driven Interactions - Scrollama is a library for doing so called 'scrollytelling' where scroll position affects the presence of certain elements in the viewport. This project makes it easier to use with Vue.

Vignesh Shenoy

• Beautiful Mermaid 1.0 - Render Mermaid diagram markup to SVG or ASCII/Unicode outputs (above) from JavaScript.

• 📊 Plotly.js 3.4 - Standalone data visualization library covering charts, graphs, maps, and more. Examples.

• pnpm v10.30.0 - pnpm why now shows a reverse dependency tree.

• 📄 DOCX 9.6.0 - Generate/modify .docx files from JavaScript.

📢 Elsewhere in the ecosystem

• Play with a complete Windows 3.11 environment in your browser. A lot of fun! There's a recreation of 90s search engine Altavista (above), a version of mIRC that connects to an actual IRC server, and a variety of classic games.

• Andrew Nesbitt shares some useful pointers on Git's 'magic' files including .gitignore, .gitmessage, and other files that affect Git's behavior.

• It used to be cool to emulate CPUs and consoles in JavaScript. But now someone's made an x86 CPU emulator in CSS!

• Hologram is an interesting web framework for the Elixir language that compiles Elixir front-end code to JavaScript with a striking level of success.

• Tailwind CSS v4.2 introduces new mauve, olive, mist and taupe color palettes to the default theme.

• 🎉 Angular has just passed 100K GitHub stars!

#​773 - February 17, 2026

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JavaScript Weekly

TanStack Hotkeys: A Type-Safe, Cross-Platform Hotkey Library - The TanStack family gains a new member: Hotkeys, an alpha-stage universal keyboard interaction toolkit. It handles cross-environment quirks, supports multi-step sequences (like Vim commands or cheat codes), and can record user shortcuts. Here's the full pitch.

TanStack LLC

💡 Being in alpha, the focus in the docs is on React for now, but it's not React only, and they're looking for help with Solid, Angular, Svelte, and Vue adapters.

Still Writing Tests Manually? Meticulous AI Is Here - Notion, Dropbox, Wiz, and LaunchDarkly have found a new testing paradigm - and they can't imagine working without it. Built by ex-Palantir engineers, Meticulous autonomously creates a continuously evolving suite of E2E UI tests that delivers near-exhaustive coverage with zero developer effort.

Meticulous sponsor

Announcing TypeScript 6.0 Beta - v6.0 is largely a "time to clean up your tsconfig" release, designed to bridge the transition to the Go-powered native TypeScript 7 later this year. Be aware of some tweaks, like types defaulting to [] and --strict now being true by default, among many more breaking changes and deprecations.

Microsoft

IN BRIEF:

• 📊 Hot on the heels of the recent State of JS survey results come the State of React results.

• 🤖 Google shows off a preview of WebMCP, an attempt to create a standard way for web sites to offer up abilities for AI agents to use.

RELEASES:

• Biome 2.4 - The formatting/linting tool can now handle embedded CSS & GraphQL in JS files, improves Vue and Svelte support, and adds HTML accessibility linting rules.

• React Native 0.84 - Hermes V1 is now the default JS engine on iOS and Android, iOS ships with precompiled binaries, and React 19.2.3.

• Node.js 25.6.1 (Current) and Node.js 24.13.1 (LTS)

• sql.js v1.14.0 - SQLite compiled to JavaScript.

📖 Articles and Videos

Experiments with CodeMirror - CodeMirror is one of the most robust code editor components out there (we've just used it while rebuilding our newsletter editor!) and it's very extensible too, as seen in this walkthrough of building a VSCode-like 'change review' feature for it.

Antonio De Lucreziis

How to Make an HTTP Request in Node.js - A comprehensive guide to using fetch in production, tackling timeouts, streaming requests and responses, retries, concurrency, mocking, and more. Most of this is useful in the broader JavaScript context.

Luciano Mammino

One Database for Transactions and Analytics. No Pipelines - TimescaleDB extends Postgres so analytics runs on live data-no sync lag, no drift, no second system. Try free.

Tiger Data (creators of TimescaleDB) sponsor

Implementing Virtual Scrolling at Billion-Row Scale - A walkthrough of tackling the numerous challenges involved in building a table component (HighTable) that handles billions of rows.

Sylvain Lesage

JS-Heavy Approaches Aren't Compatible with Long-Term Performance Goals - A web performance engineer at Automattic makes the case against JS-heavy architectures and in support of a more server-centric approach.

Sérgio Gomes

📄 Fun with TypeScript Generics - Not your typical entry-level tutorial but a dive into a niche use case. Adam Rackis

📄 Building Bulletproof React Components - Elegant, no-nonsense tips from the co-creator of SWR. Shu Ding

📄 How Rolldown Works: High-Performance Code Splitting with Bitset Logic Atriiy

📄 Angular Bindings: What Are They and How Do I Use Them? Bo French

🛠 Code & Tools

Electrobun v1: A Bun-Based Desktop App Approach - An introduction to a cross-platform runtime for JS/TS desktop apps. It uses the OS's default web renderer (like Neutralinojs) with Bun as the engine and bundler behind the scenes. The resulting bundles are as small as 12MB. (Homepage and GitHub repo.)

Blackboard

💡 Electrobun's creator ▶️ shows it off in this 4 minute video.

Console Ninja: Inline Logs & Smarter Debugging - See console output, runtime data, and errors next to your code, shared with your AI. Rethought, redesigned, and rebuilt in v2 for faster JavaScript debugging workflows.

Wallaby Team sponsor

fetch-network-simulator: Intercept fetch to Simulate Poor Network Conditions - The heart of this is a library that intercepts fetch and applies rules to do things like drop random requests, delay them, or slow them down, so you can see how resilient your app is.

Karn Pratap Singh

Peek: A Lightweight Library for Smart Page Header Behavior - You can see it in action on the page. It's "smart" in that it will differentiate between small insignificant scrolls and intentional ones. You can customize the thresholds and delays and it works with any framework. Repo here.

Chad Pierce

🏎️ Rari: Runtime-Accelerated Rendering Infrastructure - A React Server Components framework but with a Rust-powered server runtime, aiming for higher throughput and lower latency. The getting started guide will help you get the idea.

Ryan Skinner

Broad Infinite List: A Bidirectional Infinite List for React and Vue - Smoothly stream logs, feed updates, or chat history in both directions without layout shifts.

suhaotian

• 📊 Perspective 4.2 - Interactive analytics and data viz component for large/streaming datasets.

• Dockview 5.0 - Zero dependency layout manager supporting tabs, groups, grids, and split views.

• ♟️ Stockfish.js 18 - A WASM port of the Stockfish chess engine you can use from JavaScript.

• Ohm 17.5 - Parsing toolkit for building parsers, interpreters, etc.

📢 Elsewhere in the ecosystem

• 🎨 Three years ago we linked to DPaint.JS, a web based image editor modeled after the legendary 1980s Amiga and PC graphics editor Deluxe Paint. Many side projects like this fizzle out, but not DPaint! v0.2.0 has been released after two years with support for animations, pen support, texture brushes, and more.

• almostnode is an experimental project that brings a Node.js runtime environment into the browser. The demo on the homepage is neat.

• 📊 Data from over 100,000 sites was boiled down into this useful report on modern CSS usage. The median number of CSS rules per site was 2,802, with one page somehow using 210,695 rules!

• 🕹️ Not content to just port Quake to run in the browser, the creator of Three.js has now attempted a Descent port too (source).

• 🤖 Can you recreate something like SQLite with a swarm of agents? Kian Kyars had a try, as part of an agent coordination experiment.

• Cloudflare is rolling out a feature to allow agents to fetch Markdown directly from Cloudflare-powered sites.

#​772 - February 10, 2026

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JavaScript Weekly

npmx: A New npm Registry Package Browser - A smooth, fast way to browse packages on the official npm registry. It's certainly fast, smooth, and you see more info up front and center - check out the axios page for example. "We're not replacing the npm registry, but instead providing an elevated developer experience through a fast, modern UI."

npmx

💡 A particularly nifty feature is the ability to compare packages quickly, in areas like size, dependencies, module format, license, etc.

The Most Loved JavaScript Course Year After Year - JavaScript: The Hard Parts is rated 4.92 on average by thousands of developers. Build real mental models for how JavaScript works, from execution context and closures to async behavior and modern language features.

Frontend Masters sponsor

📊 The State of JS 2025 Survey Results - The results of the annual survey are here, compiling the opinions of over 12,000 JavaScript developers into a flurry of charts in areas as diverse as language pain points, frontend framework choices, build tool usage, how much of their code is AI generated, and what non-JS/TS languages they use.

Devographics

ESLint v10.0.0 Released - This long-awaited milestone completes the removal of the legacy eslintrc config system, introduces a new config lookup algorithm that starts from the linted file (great for monorepos), adds JSX reference tracking to fix scope analysis issues, and more.

ESLint Team

IN BRIEF:

• webpack shares its 2026 roadmap. Topics include support for a universal target to compile code to run on numerous runtimes, building TypeScript without loaders, CSS modules without plugins, and more.

• VoidZero shares its January 2026 recap covering updates to Oxlint, Oxfmt, Vitest, and more.

• Deno Deploy is now GA as a platform for easily deploying JS/TS apps to the Web. There's also a 45 minute video where Ryan Dahl shows it off.

• 🤯 Promethee provides UEFI bindings for JavaScript. Write a UEFI bootloader in JavaScript instead of C? Yep.

RELEASES:

• 🤖 Transformers.js v4 Preview - Run ML models in the browser on top of a new WebGPU runtime.

• Bun v1.3.9 - Run multiple package.json scripts concurrently/sequentially with --parallel/--sequential, faster Bun.markdown.react(), regexps get a SIMD boost, and more.

• Ink 6.7 - Build rich terminal apps with React. v6.7 adds concurrent rendering and synchronized updates (less flicker!)

• Ember 6.10 - Cleanups and modernization for the stable, battle-tested framework.

📖 Articles and Videos

It's About to Get a Lot Easier For Your JavaScript to Clean Up After Itself - A fun technical exploration of Symbol.dispose and using, two new features that'll ease many headaches around cleaning up after yourself: closing connections, freeing resources, etc. Just watch out for the Muppets…

Mat Marquis

▶ Evan You on Vite, Rust and the Future of JS Tooling - The Vue.js creator joined the Better Stack podcast to discuss his path from building Vite to founding VoidZero and developing a Rust-based JS toolchain.

Evan You and Better Stack

Debugging a Next.js Production Issue with Sentry Logs, Not Just Errors - Lessons from a Next.js production debugging session where understanding behavior mattered more than stack traces.

Sentry sponsor

🤖 Debugging React with AI: Can It Replace an Experienced Developer? - Nadia rigged up an app laced with subtle bugs, unleashed Claude on it, and… watched it fail to impress.

Nadia Makarevich

📄 Why Inngest Migrated from Next.js to TanStack Start Jacob Heric

📄 Implementing the Temporal Proposal in JavaScriptCore Tim Chevalier (Igalia)

📄 What to Expect in Angular 22 Kelly Vatter (Mescius)

📄 Solid.js Best Practices Brenley Dueck

🛠 Code & Tools

Shovel.js: What If Your Server Were Just a Service Worker? - A full-stack framework and meta-framework built around the Service Worker model, using Web APIs wherever possible to provide a consistent server surface across Node, Bun, and edge runtimes.

Brian Kim

VerifyFetch: Fetch Large Files with Resume and Verification Features - Imagine fetch but with the ability to resume downloads, check you downloaded what you meant to download, and fail fast on any corruption. GitHub repo.

Hamza Ezzaydia

Teach Your AI Coding Agent How to Implement Clerk Authentication - One command installs Clerk Skills for Claude Code, Cursor, Copilot, and more. Your agent learns auth so you ship faster.

Clerk sponsor

🔐 OTPAuth: One-Time Password (HOTP/TOTP) Library - Node, Deno, Bun and browser library to generate and validate TOTP and HOTP one-time passwords used in two-factor auth.

Héctor Molinero Fernández

📺 Shaka Player 5.0: Library for Playing Adaptive Media - Play formats like DASH and HLS in the browser sans plugins. Supports offline store & playback via IndexedDB. (Demos.)

Shaka Project

• Meriyah 7.1 - Long-standing 100% compliant (ES2024), self-hosted JavaScript parser which you can play with here.

• React Grab 1.0 - Tool for selecting components in the browser to feed to agents to edit.

• Downshift 9.3 - Primitives to build WAI-ARIA compliant React autocomplete, combobox & select dropdown components.

• Js_of_ocaml 6.3 - OCaml to JS transpiler.

• VuePDF 2.0 - Render PDFs in Vue 3 apps.

• Lume 3.2 - Static site generator for Deno.

📢 Elsewhere in the ecosystem

• ⭐ Shades of Halftone is Maxime Heckel's grand tour of pixelation, dithering, and the creation of GLSL-powered halftone effects with React Three Fiber. An aesthetic increasingly popular in modern web design and digital art.

• 😬 Heroku, the cloud hosting/PaaS pioneer, has adopted a 'sustaining engineering model', with no new features in the pipeline. The dev community heard the 'death rattle' and migrate off heroku has joined many to-do lists.

• 🎥 If you were overwhelmed by the buzz around using agents to build videos with Remotion, Remotion now has ▶️ a 5 minute tutorial that boils it down to the basics.

• 📗 Here's a preview of the new design for Node.js's official docs. You can file issues if you encounter any problems.

#​771 - February 3, 2026

Read on the Web

JavaScript Weekly

Four Heavyweights Drop Updates

Four stalwarts of the JavaScript ecosystem all shipped notable releases this week, and odds are you're using at least one of them:

• Gatsby v5.16 proves Gatsby, once considered neck-and-neck with Next.js in the React world, is not 'dead'. The headline feature is React 19 support.

• Babel 7 just shipped its final release. "After years in the making, Babel 8 is finally ready," in release candidate form, at least.

• Rspress 2.0 is a major release for the high-performance Rust-powered, but JavaScript-facing, static site generator.

• Lodash 4.17.23 sounds minor, but it's a 'security reset' for the still heavily used utility library and is designed to provide a base for a longer future.

Only Fools Write Tests - Modern engineering teams like Notion, Dropbox, Wiz, and LaunchDarkly use Meticulous to maintain E2E UI tests that cover every edge case of your web app.

Meticulous sponsor

🦀 OpenClaw: The Runaway AI Assistant - An intense week for a new open source TypeScript project: 150k stars on GitHub, hordes buying Mac Minis to run it, two rebrands (it was originally Clawdbot), and an ecosystem of projects the agents use autonomously (e.g. an entire social network). Another example of TypeScript at the heart of the AI boom.

Peter Steinberger

IN BRIEF:

• The popular JSBin collaborative JavaScript pastebin went down for a few days and Remy Sharp shares the war story of what happened.

• 🔒 The OpenJS Foundation has shared an annual report covering its efforts in securing the JS ecosystem.

• Angular is changing components' default change detection strategy.

• Both Astro and Svelte have shared monthly roundups of what's new.

RELEASES:

• Node.js v25.6.0 (Current) - async_hooks can now skip Promise hooks to reduce overhead. Plus, URL parsing now supports Unicode 17.

• jQuery UI 1.14.2 - The legacy UI library gets its first update in over a year and now works with jQuery 4.0.

• Bun v1.3.8 - Say hello to native Markdown parsing.

• Astro 5.17, ESLint 10.0.0-rc2, tRPC v11.9.0, Lexical 0.40.0, Reka UI 2.8 (formerly Radix Vue)

📖 Articles and Videos

⁉️ How Not to Parse Numbers in JavaScript - Why use a proper locale-aware API to parse numbers when you can hand-roll a maze of string splits, separator swaps, and implicit type coercions that silently break on edge cases?

Remy Porter (The Daily WTF)

📉 Node.js 16 to 25 Benchmarked Version-by-Version - The jumps in performance in various areas are striking (with Node 25, especially), with other areas getting more modest gains.

RepoFlow

A Practical Checklist for B2B Enterprise Readiness - Measure gaps in auth, admin UX, security, monitoring, and architecture for landing enterprise customers. Download today!

Descope sponsor

Explicit Resource Management in JavaScript - You can use using for deterministic cleanup, calling Symbol.dispose/asyncDispose at scope exit without try/finally. A small fix for leaks and forgotten teardowns in streams, observers, locks, and similar APIs.

Matt Smith

The History of C# and TypeScript with Anders Hejlsberg - GitHub interviewed the creator of both C# and TypeScript about his career, why TypeScript was created in the first place, some internal Microsoft politics, as well as the ongoing Go port of the TypeScript compiler. There's a video of the full interview, as well as 'seven learnings' boiled down in written form.

GitHub

📄 My Opinionated ESLint Setup for Vue Projects - Packed with examples to pick and choose from. Alexander Opalic

📄 A Scroll-Revealed WebGL Gallery with GSAP, Three.js, Astro and Barba.js - Striking visual image reveal effect with a live demo. Chakib Mazouni

📄 Predicting Math.random() in Firefox Using Z3 SMT-Solver Dennis Yurichev

🎤 Securing npm is Table Stakes Nicholas C. Zakas (Changelog Podcast)

📄 Building a Simple RSS Aggregator with Astro Raymond Camden

🛠 Code & Tools

Heat.js 5.0: A Flexible Heat Map Rendering Solution - Generate customized interactive heatmaps (think GitHub contributions graph), or render heatmaps as lines and bar charts. The site is packed with demos to enjoy. GitHub repo.

William Troup

Building an MCP Server? Don't Roll Your Own Auth - WorkOS AuthKit handles OAuth 2.1 flows so your MCP server just verifies tokens. Control which tools AI agents access.

WorkOS sponsor

🕒 Croner 10.0: Cron-Style Triggers and Evaluation - Trigger functions on any cron schedule using cron syntax. It can also evaluate cron expressions to give you a list of upcoming times. v10.0 brings full OCPS (Open Cron Pattern Specification) 1.4 compliance and even more scheduling options.

Hexagon

🗓️ DayFlow: A Full Calendar Component for React - A React-only feature-rich calendar component with drag-and-drop, multiple views, and all the usual GCal-style richness. Its infinite scrolling feature is nifty. GitHub repo.

DayFlow Contributors

Tsonic: A TypeScript to C# Transpiler - The idea is for creating native executables that run on .NET. I've not tested it as I'm not in that ecosystem but it's an interesting idea.

Jeswin

• 📄 EmbedPDF 2.4 - Framework-agnostic JavaScript PDF viewer. (Demo.)

• JavaScriptKit v0.40 - Swift framework for interacting with JS via WASM.

• StackBlur.js 3.0 - Long-standing Gaussian blur library; now using ESM.

• Knip 5.83 - Finds and fixes unused files, dependencies and exports.

• 📄 jsPDF 4.1 - Generate PDFs directly in JavaScript. (Demo.)

• qrcode.vue 3.8 - Vue.js component to generate QR codes.

• focus-trap 8.0 - Trap focus within a DOM node. (Demo.)

📢 Elsewhere in the ecosystem

Some other interesting tidbits in the broader landscape:

• GitHub is exploring solutions to tackle low-quality contributions, which could include giving you the option to disable PRs entirely or at least restrict them to collaborators. Got opinions? Join the discussion.

• How to throttle individual network requests in Chrome, rather than at a global level. Ideal for testing what happens when your dependencies load very slooooooowwwwwly....

• 🤖 OpenAI has released a desktop version of its agentic-coding Codex app. macOS only for now, though someone used Codex to port itself to Linux.. 😂

• ⚠️ If you're a Windows user using the popular Notepad++ editor, you might want to double check your install as the project suffered a suspected state-sponsored hijack in 2025.

• svelteesp32 is a curious project for embedding Svelte, React, Angular or Vue frontends into ESP32 microcontroller apps.