The Inner Workings of JavaScript Source Maps — Ever wondered how devtools can magically turn mangled, minified JavaScript back into readable source while debugging? Zero magic; that’s a source map doing its job. But how do source maps actually work under the hood?

Manoj Vivek

Ship Secure MCP Auth Without Relying on API Keys — API keys are hard to scope and break user flows. WorkOS Connect delivers a fully compliant OAuth 2.1 flow. It handles PKCE, scopes, user consent, and secure token issuance out of the box.

WorkOS sponsor

Anders Hejlsberg's Take on the Rise of TypeScript — The co-creator of TypeScript says he’s ‘floored’ by the language’s success (now the number one language on GitHub in 2025), shares a little info on the on-going compiler rewrite in Go, and the increasing role of AI.

The GitHub Blog

Embedding TypeScript with Hako — A technical look at the Hako JavaScript engine. It runs in WebAssembly so can be more easily embedded in more environments, including mobile apps.

Andrew Sampson

High-Performance Syntax Highlighting with the CSS Custom Highlight API — Now supported in all major browsers, the CSS Custom Highlight API provides a mechanism for styling arbitrary text ranges in a document by using JavaScript to create the ranges, and CSS to style them.

Pavitra Golchha

How to Create a Virtual Green Screen Using the Vonage Video API — Transform video calls with virtual green screens using the Vonage Video API and HTML5 canvas.

Vonage sponsor

How to Throttle Specific Requests in Chrome DevTools — Chrome DevTools has supported network throttling for a long time but you can now throttle requests to specific URLs or domains too, which could be ideal if you want to see how your site handles the failure of third party scripts.

Matt Zeunert

?! Importing Node Modules from BitTorrent — A fascinating demo of the power of Node.js’s customization hooks for overriding import behavior.

Evan Hahn

Advanced Beginner’s Guide to ClojureScript — An introduction to a compiler for the functional Clojure Lisp dialect that produces JavaScript.

Roman Liutikov

Perspective 4.0: High Performance Analytics and Data Visualization Component — Originally built by JP Morgan, this data visualization component, built in C++ and compiled to WebAssembly, is well-suited for large and real-time streaming datasets. The demo on the homepage lets you try visualization types at up to 1000 changes per second. v4.0 sees the project move to the OpenJS Foundation.

OpenJS Foundation

Agentic Postgres: Let Your Agents Cook — Build AI apps faster: Postgres with built-in memory, search, and free forkable DBs. Try it free on Tiger.

Tiger Data sponsor

Vue Data UI 3.6: Vue Components Library for Data Storytelling — There’s a lot packed into this suite of components, including basic chart types through to donuts, sparklines, world views, stacks, heatmaps, word clouds, and more. Definitely worth a look if you’re using Vue. Live examples.

Alec Lloyd Probert

🖼️ image-dimensions: Get the Dimensions of Images — A zero-dependency way to get the pixel width and height of JPEG, PNG/APNG, GIF, WebP, AVIF and HEIF images in any modern JavaScript environment.

Sindre Sorhus

React Syntax Highlighter: A Code Syntax Highlighting Component — If you need to show off source code in your React app somewhere, this is a component that does the job. GitHub repo.

Conor Hastings

CSSOM: A CSS Parser Written in Pure JavaScript — Also a partial implementation of CSS Object Model.

Nikita Vasilyev