Manipulating Dates with Day.js

Calendar Time and Date-Time Difference
Day.js is a JavaScript library that lets us manipulate dates in our apps. - https://javascript.plainenglish.io/manipulating-dates-with-day-js-calendar-time-and-date-time-difference-1b2751a4f5dd

#javascript

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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My new favorite way to build apps…

NuxtHub is a new way to deploy your Nuxt apps built by NuxtLabs. This video provides an introduction to NuxtHub and what it offers to building Nuxt applications - https://www.youtube.com/watch?v=hlmPqDkc3_s

#vue

JavaScript Design Pattern

Factory Method - https://medium.com/unlearninglabs/javascript-design-pattern-factory-method-f3ff06c99339

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

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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

#javascript

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

#javascript

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

#javascript

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/

#javascript