Every JavaScript engine all at once

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Plus the state of Node.js in 2025, V8's GC developments, and a critic of LLMs gives them a go for programming. |

#​761 — November 14, 2025

Read on the Web
Together with  Mescius

JavaScript Weekly

JavaScript Engines Zoo: Learn About Over 100 JS Engines — I'm a sucker for a big table of data and this is about as big as it gets when it comes to JavaScript engines. See how various engines compare, sort them by performance, or click on an engine's name to learn more about its development, history, and end users. The project's repo also has Dockerfiles for trying each of them out.

Ivan Krasilnikov

💡 Sticking with a theme, I've always enjoyed this ECMAScript compatibility table where you can see cross-browser and runtime support for different JavaScript features.

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

Valdi: Snap's Newly-Open Cross-Platform UI Framework — The team behind Snapchat has open sourced this cross-platform UI framework that it's used in its production apps for eight years: "Write your UI once in declarative TypeScript, and it compiles directly to native views on iOS, Android, and macOS—no web views, no JavaScript bridges."

Snap

💡 Valdi's FAQ answers several questions you might have, including how it works and why you might pick Valdi over React Native.

IN BRIEF:

RELEASES:

📖  Articles and Videos

▶  The State of Node.js in 2025, Explained — A thirty-minute talk from JSNation earlier this year where TSC member Matteo Collina presented an update on Node's still-growing popularity, release schedule, security, recent performance enhancements, the permissions system, and more.

GitNation

V8's Garbage Collector Developments in Recent Years — Andy, who's worked on both V8 and JavaScriptCore in the past, reviews the major developments in the V8 engine's garbage collector over the past couple of years. Very technical, but a valuable piece of history.

Andy Wingo

Build Type-Safe APIs for Your JS Apps: Protobuf Workshop with Buf Team — Learn how Protobuf brings type safety across your stack from Node.js APIs to frontend clients. Live Q&A with Buf engineers.

Buf sponsor

Comparing Electron vs. Tauri for Building and Distributing a Desktop App — A team working on an open-source desktop app built using JavaScript and Electron took a look into the Rust-based Tauri instead, with mixed, but mostly positive, results.

Eric Richardson

Using Expo for React Native Development in 2025: A Perspective — Expo has essentially become to React Native what Next.js became to React. But is it well suited for you? Jack weighs the pros and cons.

Jack Rosa

📄 How We Catch UI Bugs Early with Visual Regression Testing – Using Playwright and its visual comparisons feature. Tommaso Ruscica

📺 Learn JavaScript by Building 'Mario' – One of Ania's typically easy to follow, comprehensive tutorials. Ania Kubow

📄 Building a 3D Infinite Carousel with Reactive Background Gradients Clément Grellier

📄 Error Chaining in JS: Cleaner Debugging with Error's cause Matt Smith

🛠 Code & Tools

imgui-react-runtime: React + Dear ImGui + Static Hermes — When the author teased a demo of this on X a few weeks ago, I wasn't sure if it would get released, but here it is. A new way to put together native apps using React and the popular lightweight GUI library Dear ImGui.

Tzvetan Mikov

ESLint Plugin for Baseline JavaScript — The winner of last month's Baseline Tooling Hackathon is an ESLint plugin that flags code that's using features newer than your configured Baseline target (features broadly supported by modern browsers).

Ryuya Hasegawa

Customizable JavaScript Libraries for Forms & Surveys — Create branded, dynamic forms with full control over design, logic, and data storage.

SurveyJS sponsor

pnpm 10.21: Safer Installs and Smarter Runtime Management — Now installs the Node version required by a dependency, declared in its engines.runtime field, meaning CLI apps and postinstall scripts will run with the specified version. The trustPolicy setting also adds protection against supply-chain attacks by failing to install a package if its trust level drops.

Zoltan Kochan

Ink 6.5: Build Interactive CLI Apps using React — A very widely used terminal-based React renderer for building reactive terminal apps using components. v6.5 is notable for adding an incremental rendering option.

Vadim Demedes

📰 Classifieds

Add lightning-fast, on-device 1D/2D code scanning to your web app with STRICH. Easy integration, simple pricing, free trial and demo!

Still writing tests manually? See why modern engineering teams like Dropbox, Notion and Lattice rely on Meticulous to run E2E UI tests.

Launch Your Shopify Storefront in Minutes with Next.js - Open-source starter with Dynamic OG Images, AI Vector Search & Vercel Toolbar.

🎨 Try Pintura image editor for free today, add a polished cropping, rotating, and annotation experience to your web app in minutes.

📢  Elsewhere in the ecosystem

Some other interesting tidbits in the broader landscape:

🎂 P.S. JavaScript Weekly turned fifteen years old this week! Thanks to all of you for reading, and particularly anyone still subscribed from the first issue. We haven't looked at the stats in a while, but we know there are some of you! :-)

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