Benchmarking JavaScript Memory Usage — Historically, memory usage hasn’t been a heavily tracked thing in the JavaScript world, whether for a lack of tooling or motivation. This is changing, and new tools and APIs are turning up all the time. Here, Tim has done some analysis of what the top 10k Web sites are using in terms of memory and, perhaps controversially, how the choice of framework can affect things.

Tim Kadlec (WebPageTest)

Dr. Axel Explains Three ECMAScript Proposals — JavaScript’s inimitable doctor is blogging again and has examined the ‘error cause’ proposal (a way to let Error instances specify if they were caused by another error), JSON modules (a way to import data as if it were an ES module), and Accessible Object.prototype.hasOwnProperty() (a way to check if an object has an own/non-inherited property).

Dr. Axel Rauschmayer

Take Control of Your Core Web Vitals with Raygun — Don't be a bystander when Core Web Vitals are released as a ranking factor by Google. In this in-depth walkthrough, our expert team follows a proven process to monitor and improve Core Web Vitals with Raygun, and give you the power to do the same.

Raygun sponsor

Next.js 11 Released — The popular React framework takes some more steps forward with improved performance, Webpack 5 support, an experimental way to make Create React App apps Next.js compatible, and Next.js Live, a preview of a way to build Next.js apps in the browser, collaboratively, with your team.

Next.js Team

Deno 1.11 Released — A variety of enhancements in the latest release of the alternative server-side V8-powered JavaScript runtime:

• The Deno project now supplies official Docker images.
• You can now abort fetch requests in a Web-compatible way.
• deno lint is now considered stable.
• BroadcastChannel brings support for broadcasting messages amongst Web Workers.

Deno Core Team

When CSS Isn’t Enough: JavaScript Requirements For Accessible Components — Stephanie Eckles looks at how components such as tooltips, modals, tabs, carousels, and dropdown menus often require more than just CSS (even when 'pure CSS' solutions are technically possible), especially to ensure accessibility.

Smashing Magazine

Infrastructure as Code using JavaScript and Pulumi — Use the JavaScript language and ecosystem to manage and provision infrastructure across any cloud and a variety of workloads.

Pulumi sponsor

Examples of New Browser APIs to Detect JS Performance Problems in Production — Basic coverage of using performance.now(), the Long Task API (with PerformanceObserver), the Event Timing API, and the JavaScript Self-Profiling API.

Michael Shpilt

Embedding Vue.js Apps in Go(lang) — With Go 1.16’s embed, you can now include frontend assets directly in a Go binary, making a full-stack server deployment as simple as running a single executable file.

Trevor Taubitz

A Visual Guide to Node.js Streams — Streams aren’t conceptually too difficult to grasp but some visuals fit well and certainly help.

Deepal Jayasekara

Drawing Graphics with the CSS Paint API — A practical introduction to the CSS Paint API with hands-on code examples including particles, noise buttons and curvy dividers.

Georgi Nikolov

5 Reasons Not to Write Your JavaScript Data Grid from Scratch

Progress Kendo UI for Angular sponsor

MathJax 3.2.0: Beautiful Math Rendering in All Browsers — You’re smarter than me if you know what that formula represents, but it looks nice.. v3.2.0 dropped yesterday. GitHub repo.

MathJax

Viewer.js 1.10: A Flexible JavaScript Image Viewer — We first linked this almost five years ago, but it’s still kept updated. If you’ve got a group of images to show, this provides user controls to move between them, zoom (including with gestures), rotate, and such like. GitHub repo.

Chen Fengyuan

Breakpoints and console.log Is the Past, Time Travel Is the Future — 15x faster JavaScript debugging than with breakpoints and console.log.

Wallaby.js sponsor

Remote Repositories Extension for Visual Studio Code — If you use VS Code, this extension from GitHub itself offers a quicker way to open GitHub repos remotely direct from the editor.

Microsoft

Undici 4.0: An HTTP Client, Written from Scratch for Node — The goal of this project has been to replace Node’s core HTTP library with something faster, more scalable, and without the ‘fundamental design issues’ of the core API. v4 introduces redirect support, a faster WASM-powered parser, and a native mocking layer. GitHub repo.

Nagy, Collina, et al.

A Pathfinding Algorithm Visualizer — A fun tool for visualizing different pathfinding algorithms (essentially ways to find routes from one point to another). Here’s the source if you want to dig deeper, including the algorithms.

Joseph Prichard