~javascriptweekly | Bookmarks (211)

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.

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.

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.

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.

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.

SVG.js: SVG Manipulation and Animation Library — A lightweight approach without dependencies. There’s a demo on JSFiddle you can play with. GitHub repo.

Dependency Cruiser 16.5: A Way to Visualize Dependencies — If you want a look at the output, there’s a whole page of graphs for popular, real world projects including Chalk, Yarn, and React.

Should JavaScript Be Split Into Two Languages? — Two weeks ago we linked to an interesting slidedeck presented at TC39 where it was proposed to split JavaScript into two languages: a basic core and a fully featured version that needs tooling to compile it down. This covers a bit more of the story and led to a particularly extensive Hacker News discussion too.

🔊 WebAssembly Audio Decoders — Targeting both browser and Node.js use cases, this is a collection of WASM-powered audio decoding libraries for formats like MPEG I/II/III, FLAC, Ogg Opus, Ogg FLAC, Opus, and Ogg Vorbis.

AuthKit: The World’s Best Login Box — Powered by WorkOS & Radix — AuthKit is a complete solution for authentication, authorization, and user management. It’s free up to 1 million MAUs and comes standard with RBAC, bot protection, MFA, and more.

How to Roll Your Own Auth in JavaScript and TypeScript — A snappy look at how to build a session-based authentication system, something Robin notes “does not have to be complicated”.

MongoDB Atlas Search Integration with BuildShip — MongoDB Atlas Search offers powerful full-text search, vector search, and hybrid search capabilities.

Using shadcn/ui with React 19 (and Next.js 15) — Fresh documentation from the shadcn/ui project on the specifics of using the popular component library with React 19 generally, though with a slight emphasis on Next.js 15.

Reimplementing JavaScript's == in JavaScript — What a trip. Whether or not you’re aware of the ‘quirks’ of JavaScript’s == operator, this could boggle your mind.

Faker 9.1: Generate Fake, Realistic Data on Demand — Names, bios, addresses, zip codes, dates, monetary amounts, transactions, and a lot more besides. I really like the guided DevTools console based demo you can try – an idea other projects should consider. GitHub repo.

Fraction.js: Library for Working with Rational Numbers — The imprecise representation of floating point numbers can lead to all sorts of problems, so if you’re working with fractions at all, you might want a little more precision, which Fraction.js offers.

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.

Fedify: A Framework for Building ActivityPub Servers — If you want to join the fediverse with an app of your own (rather than leaning on Mastodon, say), this gives you the building blocks you need.

Yantra: A JavaScript Engine for .NET Standard — A managed JS engine for .NET Standard written in C# that supports both CommonJS and ES modules.