Using Transformers.js for AI in the Browser

Transformers.js is a seriously impressive project we link from time to time that lets you run pretrained machine learning models in the browser. Here’s a practical look at actually playing with it yourself right now. - https://www.raymondcamden.com/2024/12/03/using-transformersjs-for-ai-in-the-browser

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How to Avoid Flaky Tests in Playwright - https://semaphore.io/blog/flaky-tests-playwright

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Working with JavaScript's Scheduler API

A look at an API only available in Chromium/Edge for now, but that promises a way to prioritize and control task execution in a more refined way than was possible till now. - https://www.trevorlasn.com/blog/javascript-scheduler-api

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9 Must-Know Advanced Uses of Promises - https://blog.stackademic.com/9-must-know-advanced-uses-of-promises-a6d1ab195dfc

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JavaScript Temporal is Coming

We first mentioned the Temporal API proposal providing a better way to handle dates and times in JavaScript almost five years ago (in issue 496!) but now it really is almost here. Brian explains its basic concepts and where initial support is starting to appear. -  https://developer.mozilla.org/en-US/blog/javascript-temporal-is-coming/

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Converting Values to Strings in JavaScript

When Dr. Axel says “converting values to strings in JavaScript is more complicated than it might seem”, I’m going to believe him. An interesting poke around into something simple that you might not think about very much. - https://2ality.com/2025/04/stringification-javascript.html

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Standard Schema: A Common Interface to Schema / Validation Libraries

From the creators of Zod, Valibot and ArkType comes a fantastic bit of collaboration to define a common interface to use JavaScript and TypeScript schema libraries. - https://standardschema.dev/

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Using Intl.DurationFormat for Localized Durations - https://www.raymondcamden.com/2025/02/13/using-intldurationformat-for-localized-durations

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Introducing Mentoss: The fetch Mocker

A new approach to mocking global fetch() calls (in both browsers and server-side runtimes) inspired by previous attempts like Nock and MSW. - https://humanwhocodes.com/blog/2025/01/introducing-mentoss-fetch-mocker/

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There Are a Lot of Ways to Break Up Long Tasks in JavaScript

Due to how browsers and the event loop work, letting a single task hog the main thread is a quick way to freeze up your site’s UI. Alex explains the problem and uses a simple example to walk through the pros and cons of different solutions from basic use of setTimeout() to requestAnimationFrame(), channel messaging, and Web Workers. - https://macarthur.me/posts/long-tasks/

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Deeply Understand Currying in 7 Minutes  - https://www.yazeedb.com/posts/deeply-understand-currying-in-7-minutes

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A Report on How the Web is Really Using JavaScript

Each year, the HTTP Archive puts together the Web Almanac, a report on the ‘state of the Web’. The JavaScript section has just gone live and goes into depth on how much JS we’re using (or failing to use!), the popularity of TypeScript, loading methods, Web Worker use, and, yes, jQuery still leads the way! - https://almanac.httparchive.org/en/2024/javascript

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How ECMAScript Engines Optimize Your Variables

From the authors of the Boa JS Rust-powered JavaScript engine. - https://boajs.dev/blog/2025/03/05/local-variables

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Lazy Load Background Images with the IntersectionObserver API  - https://www.debugbear.com/blog/lazy-load-background-images-intersection-observer

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Variable Naming Best Practices in JavaScript

12 variable naming conventions and best practices in… - https://javascript.plainenglish.io/variable-naming-best-practices-in-javascript-94af115f42cd

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Ecma International Approves ECMAScript 2025: What’s New?

The Ecma General Assembly has approved the ES2025 language specification, which you can read in full here, or you can enjoy Dr. Axel’s more succinct explainer instead. - https://2ality.com/2025/06/ecmascript-2025.html

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The Many, Many, Many JavaScript Runtimes of the Last Decade

A meaty article (which took a year to put together) covering the myriad of JavaScript runtimes and engines both past and present, from obvious picks like Node.js to cloud platforms and lesser known ‘honorable mentions’. This is a great summary to round out your JS ecosystem knowledge. - https://buttondown.com/whatever_jamie/archive/the-many-many-many-javascript-runtimes-of-the-last-decade/

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Writing a Tiny Undo/Redo Stack in JavaScript

You might prefer to lean upon an established approach (using Immer patches perhaps), but if you want to implement something small yourself, this might help. - https://blog.julik.nl/2025/03/a-tiny-undo-stack

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When to Use map() vs. forEach() - https://allthingssmitty.com/2025/04/21/when-to-use-map-vs-foreach/

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Building an Offline-Friendly Image Upload System

How to leverage PWA tech such as IndexedDB, service workers, and the Background Sync API to help improve the reliability of web apps for users, particularly those with unreliable internet connectivity. - https://www.smashingmagazine.com/2025/04/building-offline-friendly-image-upload-system/

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