Shallow Clones vs Structured Clones  -https://philna.sh/blog/2024/12/30/shallow-clones-versus-structured-clones/

#javascript

What’s New for JavaScript Developers in ECMAScript 2024

High level analysis of developments in the ECMAScript spec, with insights from Ecma vice president Daniel Ehrenberg, TC39 co-chair Rob Palmer, and developer Ashley Claymore. A good, thorough roundup of the state of play. - https://thenewstack.io/whats-new-for-javascript-developers-in-ecmascript-2024/

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Patterns for Memory Efficient DOM Manipulation

Marc shares a solid look at the best practices to employ in order to avoid excess memory usage when managing/updating the DOM, all with a hope to make your apps faster. A good overview of the core principles behind DOM manipulation and optimization. - https://frontendmasters.com/blog/patterns-for-memory-efficient-dom-manipulation/

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Common Causes of Memory Leaks in JavaScript

Filled with basic examples oriented around V8-based runtimes like Node.js and Deno. - https://www.trevorlasn.com/blog/common-causes-of-memory-leaks-in-javascript

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Reverse Engineering Minified JavaScript with ChatGPT

Writing new code with AI is one thing, but could it be even better at understanding existing code that you’re struggling to grok? Yes, it seems. - https://glama.ai/blog/2024-08-29-reverse-engineering-minified-code-using-openai

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Don't Sleep on AbortController

AbortController is a broadly available mechanism for, originally, aborting Web requests on demand, but you can use it for a lot more than that  - https://kettanaito.com/blog/dont-sleep-on-abort-controller

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Exploring JavaScript Symbols

Symbols were a new ‘quirky little primitive’ (as Trevor puts it) that arrived with ES6 ten years ago, but they continue to be poorly understood. Trevor boils them down really well, including a little side quest into the likely-to-be-deprecated ‘species.’ - https://www.trevorlasn.com/blog/symbols-in-javascript

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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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