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10/30/2025
TypeScript and JavaScript dominate on GitHub in 2025





















#​759 — October 31, 2025

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JavaScript Weekly








Directives and the Platform Boundary — First there was the "use strict" directive to opt in to strict mode in JavaScript, but now you’ll encounter use client, use server, React's new use no memo, and more, and they're not standard JS features at all. Tanner thinks this proliferation of directives comes at a cost, with an increased risk of framework and tooling lock-in.


Tanner Linsley (TanStack)






Add Excel-like Spreadsheet Functionality to Your JavaScript Apps — SpreadJS is the industry-leading JavaScript spreadsheet for adding advanced spreadsheet features to your enterprise apps. Build finance, analysis, budget, and other apps. Excel I/O, 500+ calc functions, tables, charts, and more. View demos now.


SpreadJS from MESCIUS inc sponsor






🏆 TypeScript Leaps to #1 Most Used Language on GitHub — As part of this week’s GitHub Universe event, GitHub released its annual report of activity on the platform. A year ago, Python jumped to #1, pushing JavaScript to #3, but this year TypeScript takes the crown and GitHub suggests LLM-oriented development played a role. Taking JavaScript and TypeScript together, however, places our ecosystem far out in front.


GitHub




IN BRIEF:





RELEASES:




📖  Articles and Videos





I Built the Same App 10 Times: Evaluating Frameworks for Mobile Performance — When targeting mobile devices, small bundle sizes and quick rendering times are key, so Loren wanted to see how different approaches compared. Marko, SolidStart, SvelteKit, Qwik, Nuxt, Next.js and more are all under the spotlight here.


Loren Stewart






▶  The Origin Story of JavaScript — Annie takes us all the way back to the start of the Web in the early 90s and walks us through the conditions and advancements that enabled JavaScript to take off, all the way through to our modern framework-oriented, tool-rich ecosystem. (25 minutes.)


Annie Sexton






Still Writing Tests Manually? — See why modern engineering teams like Dropbox, Notion and Wiz rely on Meticulous to run E2E UI tests.


Meticulous AI sponsor






Why NaN !== NaN in JavaScript (and the IEEE 754 Story Behind It) — NaN is a number, but it’s also Not a Number! This leads to some well-known quirky behavior, but JavaScript isn’t to blame.


Piotr Zarycki






What I Learned Porting Mastro from Deno to Node — Mastro is a site generator originally for Deno only. But if Deno is compatible with Node, is it easy to make Deno-facing code run on Node too? Not exactly, but it’s possible.


Mauro Bieg




📄 Migrating from Node.js v22 to v24 – Now that v24 is the active LTS release, it's time to upgrade when possible. Augustin Mauroy


📄 Did You Know That There's an HTML Tables API? Christian Heilmann


📄 Writing Rust-Like Code in TypeScript Andrew Israel



🛠 Code & Tools








Navcat: 3D Floor-Based Pathfinding Library — It’s not often we see a library with such a funny demo on the homepage (it involves cats and laser pointers!) Navcat is a pathfinding library, aimed at games and simulations, for enabling objects to route through 3D space. There are numerous other interesting demos too. GitHub repo.


Isaac Mason






Introducing ArkRegex: It's RegExp() with Types — The idea is simple: swap out the RegExp constructor or regular expression literals for this typed wrapper and get types for patterns and capture groups. Part of the ArkType project. – GitHub repo.


ArkType Project






Measure and Improve the Quality of Code Generated by LLMs — Open source tool to fine tune prompts, compare model code quality, & monitor generated quality over time.


Angular sponsor






Slim Select 3.0: An Advanced Select Dropdown Control — A feature-rich select dropdown component with no dependencies. v3.0 adds an official React component option, fixes bugs, and improves accessibility.


Brian Voelker






🤫 spoilerjs: Framework-Agnostic 'Spoiler Effects' — If you’ve got some text (or maybe sensitive data like a token) you want to hide on a page until someone clicks on it, this Telegram-inspired web component is for you.


shajid hasan






Gasket: CLI Tool to Discover 'Bridges' Between JavaScript and Native Code — Dynamic analysis tool that inspects the in-memory layout of JavaScript function objects to identify those that cross the language boundary. This is quite niche, but built by the authors of a paper about identifying such bridges for security purposes.


Alexopoulos and Sotiropoulos






> vue-command: A Terminal Emulator Component for Vue.js


Julian Claus






  • 📊 Recharts 3.3 – A chart library built on top of D3. The homepage has examples and demos. v3.3 gives charts the direct ability to handle responsive sizing.




  • 🦴 Cornerstone.js 4.8 – Libraries for building medical imaging apps.




  • 🔎 fuzzy-search 2.0 – Fast fuzzy search library for the frontend.




  • Immer 10.2 – Popular library for working with immutable state.




  • Dependency Cruiser 17.2 – Tool to visualize dependencies.




  • Ink 6.4 – Use React to build CLI apps.









📰 Classifieds




🔷 Build a full-featured BPMN editor in record time — use our ready-made JointJS template and focus on innovation, not implementation.



⚡ UI changes? Catch them before prod. Vizzly = local TDD + review rules for teams, not just screenshots.






📢  Elsewhere in the ecosystem



A roundup of some other interesting stories in the broader landscape:











10/23/2025
Vitest 4.0 and Next.js 16





















#​758 — October 24, 2025

Read on the Web




JavaScript Weekly








Vitest 4.0 Released: The Vite-Native Testing Framework — The Vite-powered, Jest-compatible testing framework introduces visual regression testing, makes its ‘Browser Mode’ stable (for running tests in a browser directly), adds Playwright Traces support, and more. Still unsure? You can compare it with other test runners here.


VoidZero and Contributors




💡 Starting from Angular 21, Vitest will become Angular's default test runner, replacing Karma and Jasmine.





The Most Customizable Auth for JavaScript Developers — See how FusionAuth gives you total customization freedom without building from scratch. Create fully branded login experiences that integrate with any JS stack. Downloadable and self-hostable. Watch the free on-demand webinar.


FusionAuth sponsor






Next.js 16 Released — Launched alongside this week’s Next.js Conf (you can ▶️ watch the livestream here), the popular React framework gains explicit caching components, an MCP server for AI-assisted debugging, both Turbopack and React Compiler support go stable, and more.


Lai, Story, Markbåge, and Neutkens






▶  The Nordic.js 2025 Talk Videos — Nordic.js took place earlier this month and they’ve just shared the videos of a fantastic set of talks. Some highlights include Christoph Porteneuve talking about ES2026 and ES2027, Kyle Simpson on passkeys, and Sara Vieira diving into writing an emulator in JavaScript.


Nordic.js




IN BRIEF:





RELEASES:




📖  Articles and Videos








Importing vs Fetching JSON — You’ve used import to load code, but what about loading JSON? Import attributes, now broadly supported across browsers, make it possible, but is there any point instead of using fetch? Jake investigates.


Jake Archibald






Rethinking Async Loops in JavaScript — Awaiting in loops runs your async operations one-by-one instead of all at once. And using map() with await? It doesn’t even wait. Matt breaks down some patterns that actually work, and why forEach with async is easy to get wrong.


Matt Smith






Build Your Apps Faster with a Ready-to-Use Backend — Forget about DevOps headaches. OneEntry gives frontend devs a ready-to-use cloud backend with built-in database, intuitive admin panel, and flexible data models that adapt to any project.


OneEntry sponsor






Building CLIs with Ace: A Bookmarks App in Node and Bun — Ace (GitHub repo) is a CLI app framework built by the AdonisJS folks that you might not have encountered before.


Harminder Virk






Solving NYT's Pips Puzzle with TypeScript — I love doing the New York Times’ various puzzles, though I’m not a huge fan of their newest one: Pips. Nonetheless, it’s an interesting puzzle to consider how to solve algorithmically.


Andrew Healey




📄 React and Remix Choose Different Futures Brendan McLoughlin


📄 One Year with Next.js App Router — Why We're Moving On Paper Clover


📄 4 Unconventional Ways to Cast in TypeScript PolyWolf



🛠 Code & Tools





Ky 1.13: Tiny, Elegant Fetch-Based HTTP Client for Browsers — Makes the Fetch API tidier to use (as shown here), and is also a good modern alternative for Axios. v1.13 adds a ‘context’ feature making it easier to create reusable API clients that can accept custom parameters.


Sindre Sorhus






JustGage 2.0: Draw and Animate Dashboard-Style SVG Gauges — A big release for a project started over a decade ago, now brought into the modern age and using native SVG APIs. There's a playground that lets you play with the options and gauge styles.


Bojan Djuricic






Wallaby v3: Smarter Testing with Result Streaming & Cached Results — New Wallaby v3 streams live results, uses cached execution for instant startup, and prioritizes active files, making JS & TS test feedback faster and smarter than ever.


Wallaby Team sponsor






Solito 5.0: A Way to Use React Native with Next.js — Solito is a wrapper around React Navigation and Next.js that lets you share navigation code when building cross-platform apps. v5.0 supports Next.js 16 and Expo 54, and also drops React Native Web as a dependency.


Fernando Rojo






[.. 🔎..] MaxIntervalCover: Compute the Optimal Subset of Non-Overlapping Intervals


Robert Eisele






  • p-limit 7.2 – Run multiple promise-returning and async functions with limited concurrency. Now .map() can accept an iterable, not just an array.




  • Repomix 1.8 – Pack an entire repository into a single, LLM-friendly file. Now with official plugins for Claude Code.




  • ESLint Markdown Language Plugin 7.5 – Lint JS/TSX code blocks in Markdown documents.









📰 Classifieds




🕳️ 🥊 Hiring Now: Join Holepunch to build the peer-to-peer internet. No servers. Open source, privacy-first. Shape the future of apps. Remote worldwide.



Meticulous writes and maintains your E2E UI tests. Built for high-velocity teams who can’t afford flakes. Relied on by Notion, Dropbox, Wiz, Lattice, etc.






📢  Elsewhere in the ecosystem



A roundup of other interesting stories from the broader landscape:
















10/16/2025
A Bun-believable release that isn't half-baked





















#​757 — October 17, 2025

Read on the Web




JavaScript Weekly








Bun 1.3: The Full-Stack JavaScript Runtime — Arriving a few hours after last week’s issue (natch!) Bun 1.3 remains the big news of the past week. Bun is a performance and DX-focused JavaScriptCore-powered runtime which, with v1.3, balances being a drop-in Node.js replacement with becoming a ‘full-stack runtime’ among other exciting developments:



It also wouldn't be a big Bun release without ▶️ the obligatory release video.

The Bun Team






AI Agents? Meet External Tools — Launching an AI-powered app? Make sure your agent is securely connecting with all of your external tools and APIs. Learn more about how Auth0’s Token Vault can secure your logins and agents so your users aren’t left vulnerable and exposed.


Auth0 sponsor






Announcing Vite+ / VitePlus — Originally announced at last week's ViteConf, Evan shares more details about what this extended, unified Vite-based toolchain (now in ‘early access’) is, and the motivation behind it. Unlike regular Vite, it has a commercial angle but “will be free for individuals, open source projects, and small businesses” as well as “source available.”


Evan You






Node.js v25.0.0 (Current) Released — The latest cutting edge version of Node has arrived with Web Storage enabled by default, JSON.stringify perf improvements, a new --allow-net option in the permission model, built-in Uint8Array base64/hex conversion, and WebAssembly and JIT optimizations.


Rafael Gonzaga




IN BRIEF:





RELEASES:




📖  Articles and Videos





Improving the Trustworthiness of JavaScript on the Web — A look at WAICT (Web Application Integrity, Consistency, and Transparency), an early-stage W3C-backed effort to bring stronger ‘app store-like’ security guarantees to the Web by ensuring the code a browser runs hasn’t been modified by attackers.


Michael Rosenberg (Cloudflare)






▶  Beyond Signals — A half-hour talk from the creator of SolidJS, exploring how signals (once pioneering, now mainstream) are shaping web development, their architectural implications, but why we’re only “at the beginning of the journey” and what comes next.


Ryan Carniato






Build Smarter Web Apps with AI-Powered JavaScript UI Controls — Build enterprise apps faster with 145+ AI-ready, high-performance JS components. Start your free trial today.


Syncfusion sponsor






Lazy Fields for 30x Speedup Without Decorators or Transforms — Some clever work from the creators of the Joist ORM.


Stephen Haberman (Joist)






🌿 A Quick Tutorial on the Barnsley Fern Fractal — The Barnsley fern is a fractal that represents a plant-like fern structure.


Slicker




💡 Slicker has other examples of implementing effects in (somewhat old school) JavaScript, including the Julia set fractal, plasma, and a fire effect.



📄 Find Where a Specific Object Was Allocated in JavaScript with DevTools – A slightly convoluted Chrome DevTools trick for tracking down where a specific object was allocated. Joona Heikkilä


📄 A Modern Guide to Reading and Writing Files in Node.js – A comprehensive guide to a variety of approaches. Luciano Mammino


📄 Refactoring a Form to a Signal Form in Angular Tim Deschryver


📄 How to Get Started with GitHub Copilot CLI Andrea Griffiths (GitHub)



🛠 Code & Tools





DOMPurify 3.3: A Fast, Tolerant XSS Sanitizer for HTML — Supports all modern browsers (as well as Node.js) and is heavily tested. There’s a live demo here.


Cure53






python-node: Integrate Python ASGI Apps with Node.js — Several months ago Platformatic unveiled php-node, a way to embed PHP directly within Node apps. Now they’re tackling Python with @platformatic/python-node, a Node-native bridge that embeds a Python interpreter and speaks ASGI.


Stephen Belanger and Matteo Collina






Tiger Lake: Real-Time Data for Dashboards, Agents & Analytics — Unify Postgres and your lakehouse for live, full-context data—no pipelines, no lag.


TigerData sponsor






jsonriver: A Simple, Fast Streaming JSON Parser — A library to parse JSON incrementally as it streams in, such as from a network request or an LLM, returning a sequence of ‘increasingly complete’ values.


Peter Burns (Google)






Kaluma 1.3: A Tiny JS Runtime for the Raspberry Pi Pico 2 — Can a JavaScript runtime squeeze onto an RP2350-based Raspberry Pi Pico 2? Kaluma can, all while offering some Node.js-like niceties. v1.3 is powered by the latest version of JerryScript, a lightweight JS engine for constrained environments.


Kaluma Project






Triplex: A Visual Workspace for Building React Components — Originally a commercial tool for laying out components in 3D scenes rendered with React Three Fiber, Triplex is now open source. Its scope has increased with a VS Code extension and support for regular React DOM elements and components too.


Mike Douges and Pmndrs






  • 🗓️ Schedule-X 3.3 – Event calendar control. MIT licensed, but with a premium version with added features.




  • json-joy v17.55.0 – Real-time, collaborative editing algorithms and utilities for JSON data models.




  • Ky 1.12 – Simple HTTP client based upon Fetch for browsers, Node & Deno.




  • 🗓️ React Date Picker 8.8 – Simple date picker component. (Demo.)




  • Faker 10.1 – Generate fabricated data to your heart's content.









📰 Classifieds




Meticulous writes and maintains your E2E UI tests. Built on Chromium with a deterministic engine, it’s the only testing tool that eliminates flakes.



🚀 Unlock 2× Team Efficiency in Just 30 Days. JS Weekly readers: Claim your free Audit by Fractional CTO and resolve your toughest SaaS issues—fast.



🕳️ 🥊 Hiring Now: Build P2P apps for mobile & desktop. Ditch servers, empower users, protect privacy. Open source. Remote EU.






📢  Elsewhere in the ecosystem



A roundup of some other interesting stories in the broader landscape:











10/09/2025
Vite gets its own documentary





















#​756 — October 10, 2025

Read on the Web




JavaScript Weekly








▶  Vite: The Documentary — From the same creators of the fantastic ▶️ Node.js, ▶️ Angular and ▶️ React documentaries comes an up to date look at Vite, the build tool that has taken the JavaScript ecosystem by storm in recent years. Many luminaries make an appearance to tell their stories, including Evan You, Rich Harris, and Ryan Carniato. (39 minutes.)


CultRepo




💡 In related news, Vite+ (VitePlus) has appeared, a future, more commercial offering of the Vite toolchain aimed at teams. More news on this next week.





Go from Monolith to Monorepo — Join Mike North for this course on architecting maintainable, fast and light codebases. You'll learn how to refactor a codebase into a TypeScript monorepo using tools like Nx and Lerna — covering dependencies, formatting, linting, performance and more.


Frontend Masters sponsor






Introducing the React Foundation — At React Conf 2025 this week, it was announced that control of React and React Native is to be moved from Meta to an independent foundation supported by the Linux Foundation and initially backed by corporate members including Amazon, Expo, Meta, and Microsoft.


Webster, Carroll, Savona and Alpert




📺 If you'd like to catch up with React Conf, you can now watch the ▶️ day one and ▶️ day two livestream recordings on YouTube.



IN BRIEF:



RELEASES:




📖  Articles and Videos








The Birth of Prettier — The author takes us back ten years to the genesis of Prettier, the popular opinionated, deterministic code formatter he co-created with James Long. Prettier effectively introduced and popularized the practice of fully-automated AST-based code formatting in the JavaScript ecosystem.


Christopher Chedeau (Vjeux)






15 Recent Node.js Features That Can Replace Popular npm Packages — Many features that once required third-party packages are now built into the runtime itself.


Lizz Parody






⚡ Supercharge Postgres: 2PB Scale & 1.5T Metrics/Day — TigerData makes Postgres the fastest database for modern workloads: 2PB scale, 1.5T metrics/day, no black boxes.


TigerData sponsor






How to Group Arrays Without reduce() — A look at using Object.groupBy() and Map.groupBy()


Matt Smith






The History of Core Web Vitals — Addy tells the story behind Core Web Vitals, a popular set of metrics for measuring Web performance and its impact on user experience.


Addy Osmani




📄 How to Add Fast, Client-Side Search to Astro Static Sites – JavaScript to the rescue! Ivan Chepurin


📄 Shipping Node.js Packages in 2025 – A dense and helpful slidedeck from a talk given at last week's NordicJS event. Joyee Cheung


📄 How to Animate WebGL Shaders with GSAP: Ripples, Reveals, and Dynamic Blur Effects Andrea Biason


📄 Vue Basics: State Management in Vue David Adeneye Abiodun



🛠 Code & Tools








Viz.js 3.20: Work with Graphviz in the Browser — Graphviz is a suite of open source graph drawing tools of over 30 years’ vintage. Viz.js is a WebAssembly Graphviz build that brings its functionality into the browser. GitHub repo.


Michael Daines






EmbedPDF: A PDF Viewer That Integrates with Any JavaScript Project — No dependencies, supports any framework, and has features like themes, annotations, redaction, search, smooth scrolling, and more – all available via a dev-friendly API. See the docs or try a live demo.


EmbedPDF






🎸 AI Agent Builder with All the Features, None of the Overhead — Shipping an agent-first web app? Use our template with all premium diagramming features and cut your dev time to days.


JOINTJS sponsor






The Coinbase Design System (CDS) React Components Library — The team behind Coinbase has open sourced its component library for React and React Native. There are lots of neat effects in the components, such as this ‘rolling number’ component.


Coinbase






Icebird: Read Apache Iceberg Tables in JavaScript — Iceberg is a high performance open-source format for large analytic tables.


Hyperparam






resolve-lexicon: Resolve AT Lexicons Over the Network — Lexicon is a schema definition language used in the AT Protocol world.


Dan Abramov










📰 Classifieds




HIRING NOW🕳️ 🥊: At Holepunch we maintain 2000+ OSS npm packages, make the JS runtime Bare to build the P2P Internet. Real tech, Real impact. Join us!



Meticulous automatically creates and maintains an E2E UI test suite with zero developer effort. Relied on by Notion, Dropbox, Wiz, Lattice, etc.






📢  Elsewhere in the ecosystem



A roundup of some other interesting stories in the broader landscape: