Promises visualized

JavaScript Visualized: Promise Execution — A helpful diagrammed and animated article, coupled with an (optional) 8-minute video, that goes into how promises work and are scheduled behind the scenes. It’s useful to have a good mental model of these mechanics, given promises form the basis of asynchronous functions in JavaScript.

Lydia Hallie

Learn Advanced JavaScript Performance Optimization — Garbage collection, memory profiling, data structures like sets and arrays, and event loop management. Learn performance-driven programming, preparing you to write blazingly fast and efficient code!

Frontend Masters

A Look at ECMAScript’s Iterator Helper Methods — The proposal is several years old, but now at stage 3 in TC39, Iterator Helpers are being implemented and ship with V8 12.2/Chrome 122. The helpers are functions like .map, .filter, .take and .forEach and are made available to any object with Iterator.prototype in its prototype chain.

Rezvan Mahdavi Hezaveh (V8)

Introducing Waku’s “Pages Router” — Waku is an interesting minimal server-side React framework and it’s now also bringing a minimal API to the modern React server components era: “Making a Waku site is now as simple as making a few files and folders in the ./src/pages directory”..

Sophia Andren

What You Need to Know About Modern CSS — A guide with a list of the newest additions to CSS (think nesting, view transitions, :has(), etc). JS plays an occasional role too, whether by enhancing or polyfilling modern CSS features.

Chris Coyier

Building a Micro HTMX SSR Framework — Matteo builds on an earlier tutorial about creating a ‘movie quotes’ app by exploring an alternative backend stack to use, based upon Fastify, Vite and HTMX.

Matteo Collina

Create Vue3 App: A New Vue App Scaffolding Tool — Taking inspiration from tools like Create React App, this uses Vite to help you spin up a new Vue-based app using tools based upon answers you give to a number of questions.

Selemon Brahanu

DOM3D.js: 3D DOM Viewer in a GitHub Gist — Some code you can copy and paste into your browser console to get a 3D view of the DOM, sort of.. (move your pointer to navigate the.. thing it creates). The effect is odd but fun to play with.

Orion Reed

Free Auth for 1 Million MAUs — WorkOS provides easy-to-use APIs for authentication, user identity, and complex enterprise features like SSO and SCIM.

WorkOS