~javascriptweekly | Issue 712 - JSConf is back (17)

Quaternion.js: A JavaScript Quaternion library — Last week we featured the author’s Fraction.js library, now we go a step deeper with a way to work with 3D rotations using quarternions.

Immutable.js 5.0: Immutable Collections for JavaScript — Provides numerous persistent immutable data structures including a list, stack, map, ordered map, set, ordered set, and records.

Sonner 1.7: The Toast Notification React Component — There’s a live demo to try on the homepage, or see the GitHub repo. v1.7 focuses on animation improvements, browser support, and React 19.

JavaScript's ??= Operator: Default Values Made Simple — The ??= nullish coalescing assignment operator snuck into JavaScript a few years ago via ECMAScript 2021 and has been broadly supported almost everywhere for ages. Trevor shows off how it can tighten up your assignments here.

🇺🇸 JSConf is Back; Here's the Details — Two months ago, the OpenJS Foundation announced that the popular JSConf brand was joining the foundation and a new North American JSConf event would happen in due course. Now you can mark your calendars for October 14-16, 2025 for an event taking place in the Chesapeake Bay area of Maryland, USA.

Announcing Rspack 1.1 — Rspack is a fast, Rust-powered alternative to Webpack but with the same API. v1.1 boasts being 10% faster than v1.0 and has an improved, though still experimental, incremental build feature. If super fast build times are your bag, this needs to be on your radar.

Wasmer Adds Node.js and Bun Support — Wasmer is a Rust-powered WebAssembly runtime and Wasmer 5.0 adds V8 and JavaScriptCore backend support, meaning you can try all sorts of things like, say, running Clang, Python, or even compiled JavaScript apps inside your own JavaScript app..

Why Would Anyone Need Generator Functions? — A golden oldie that I enjoyed revisiting because it covers an oft misunderstood and not particularly commonly encountered JavaScript feature.

The Most Effective Ways to Improve Core Web Vitals — Everyone wants their site to be as performant as possible, especially when Google factors performance into its rankings, but how? Google shares a variety of practical techniques to improve your INP, LCP, and CLS metrics here.

Why Code Security Matters - Even in Hardened Environments — A well diagrammed dive into a technique that allows malicious parties to turn a file write vulnerability in a Node.js app into a remote code execution exploit even when the file system is read-only.

MongoDB Helps Devs Build Better AI Agents with LangChain & Hybrid Search — It’s easier than ever to build AI agents with LangChain, perform hybrid search and ingest large-scale documents.

npmpackage.info: Detailed Package Info on a Single Page — Give this online tool the name of an npm package and you get a quick ‘dashboard’ style view of the project’s main statistics, covering areas like quality scores, commits, open issues, releases, bundle size, and more.

Prompt, Run, Edit, and Deploy Full-Stack Web Apps with bolt.new — StackBlitz recently released an in-browser AI web development agent: bolt.new! Give it a try today.

Docusaurus 3.6: The Docs-Oriented Static Site Generator — Meta’s Docusaurus is a popular way to build docs sites (like these). v3.6 is focused on performance, now using tools like Rspack and SWC to make builds super fast.

Handsontable: Spreadsheet-Like JavaScript Data Grid for Your App — Feature-rich data grid for developers seeking a powerful, customizable, and accessible solution to manage complex data.

New Wallaby 2.0 - Works with All Editors - A Massive Step Forward for JavaScript Testing — Experience faster JavaScript debugging, real-time insights, & enhanced coverage monitoring with Wallaby 2.0's integrated UI.