JavaScript on your schedule

#​633 — April 6, 2023

Read on the Web

❓ JavaScript Weekly on a Thursday? It’s true. As well as it being Good Friday tomorrow, we’ve decided to move to Thursday permanently going forward. We hope you have a good Easter, if you celebrate it, otherwise enjoy one fewer email on Fridays ????
__
Your editor, Peter Cooper

JavaScript Weekly

Croner: Cron for JavaScript and TypeScript — Trigger functions upon the schedule of your choice using the classic cron syntax. Works in Node, Deno, Bun and the browser, across time zones, offers error handling and overrun protection, and more. There’s an interesting live demo on JSFiddle.

Hexagon

▶️ JSON vs XML with Douglas Crockford — The author of 2008’s hugely popular JavaScript: The Good Parts went on a podcast to share the story of JSON, his discovery of JavaScript’s ‘good parts’, and his general approach to building software, including his dislike of JavaScript ‘frameworks.’ There’s a transcript if you’re not keen on listening. (50 minutes.)

CoRecursive Podcast podcast

Headless CMS with World-Class TypeScript Support — Kontent.ai is the leading platform for modular content. Streamline your code using TypeScript SDK, CLI, Rich text resolver, and strongly typed model generator. Scale with no problems when your project grows. Have you seen our UI?

Kontent.ai sponsor

The Angular Signals RFC — There’s a lot of excitement about a shift in Angular involving the addition of signals as a reactive primitive – the official RFC is now available for this feature, and you’re encouraged to leave comments. If you’d rather see a practical use for signals, Joshua Morony recorded ▶️ a screencast showing them off.

Angular Team

Over 100 Algorithms and Data Structures Demonstrated in JS — Examples of many common algorithms (e.g. bit manipulation, Pascal’s triangle, Hamming distance) and data structures (e.g. linked lists, tries, graphs) with explanations.

Oleksii Trekhleb et al.

IN BRIEF:

Laurie Voss looks at the most popular frameworks used in sites deployed to Netlify. React-based options lead the way.

Oliver Dunk of the Chrome Extensions Team has posted an update on the Manifest V2 to Manifest V3 transition – it’s taking longer than expected so Manifest V2 isn’t disappearing any time soon.

V8 v11.2 is shipping with support for WebAssembly tail calls.

With Chrome 113, Chrome is now shipping support for WebGPU.

A look at how Microsoft’s Blazor (a stack aimed at building front-end apps with C#) is skirting around JavaScript with its focus on WebAssembly.

JSDayIE 2023: The First JavaScript Conference in Ireland Is Back! — Join us on September 26th in Dublin to experience everything the Irish JavaScript community and Ireland have to offer.

JSDayIE sponsor

RELEASES:

Electron 24.0 – Complete with Chromium 112, V8 11.2, and Node 18.14.

Storybook 7.0 – Though still tagged ‘next’ and pending a proper launch.

Storybook for React Native 6.5

WebStorm 2023.1 – Commercial JS IDE from JetBrains.

Rete.js 2.0 Beta – Framework for building node-based editors.

???? Articles & Tutorials

Making a Big, Slow Vue/Alpine Page ‘Blazingly’ Fast — A practical example of a pattern the author is billing a “reactive switchboard.” “I’m going to use Vue/Alpine lingo in this article, but I think this pattern applies to lots of different tools.”

Caleb Porzio

▶  Watch Dan Abramov Explore React Server Components — At an epic (though well timestamped) four hours, this isn’t a quick watch, but Dan and Ben Holmes walk through everything React Server Components oriented, complete with diagrams, code, and a real-world app.

Ben Holmes

Getting PWAs in App Stores with PWABuilder — Thomas Steiner demonstrates how PWABuilder makes it possible to submit Progressive Web Apps (PWAs) to app stores like those provided by Google, Apple, and Microsoft.

Thomas Steiner (Google)

Add a Full-Featured Notification Center to Your App in Minutes

Courier.com sponsor

What Are Source Maps? — Learn how source maps can help you debug your original code instead of what was actually deployed after the build process.

Sofia Emelianova (Chrome Developers)

How I Used ChatGPT in My JavaScript Projects

James Q Quick

???? Code & Tools

Relaunching JSPM CLI for Import Map Package Management — Several years ago when JS had numerous competing module formats, JSPM was a useful package manager atop SystemJS, but now it’s being relaunched as an import map package management tool.

Guy Bedford

Chrome Extension CLI 1.4: CLI for Building Chrome Extensions — Want to get building an extension for Chrome as quickly as possible? This Node-powered tool aims to get you on the right path ASAP. v1.4 adds a script to generate a ZIP file (also known as a ‘postcode file’ at Microsoft UK? ????) of the extension.

Dutiyesh Salunkhe

React Chrono 2: A Flexible Timeline Component — A complete overhaul of a popular component. You can render themeable timelines in vertical, horizontal, or vertical alternating orientations. It includes keyboard navigation support, auto advancement, and, as of v2, support for nested timelines.

Prabhu Murthy

Dynaboard: A Visual Web App IDE Made for Developers — Build high performance public and private web applications in a collaborative — full-stack — development environment.

Dynaboard sponsor

Jampack: A Post-Processing Tool to Optimize Static Websites — Similar to a bundler or build tool, with features like image optimization, asset compression, and some code auto-fixes — all amounting to strong Core Web Vitals scores.

divRIOTS

imask.js 6.5.0: A Vanilla JavaScript Input Mask — Prevent users from entering invalid values. Has plugins for Vue, Angular, React, Svelte, and Solid, if needed.

imaskjs

tween.js 19.0
↳ JS tweening engine for easy animations.

Swiper 9.2
↳ Modern mobile-friendly touch slider.

gridstack.js 7.3
↳ Dashboard layout and creation framework.

ReacType 15.0
↳ Visual prototyping tool that can export React apps.

xstyled 3.8
↳ Utility-first CSS-in-JS framework for React.

Spacetime 7.4.2
↳ Lightweight timezone library.

???? Jobs

Find JavaScript Jobs with Hired — Hired makes job hunting easy-instead of chasing recruiters, companies approach you with salary details up front. Create a free profile now.

Hired

Full Stack JavaScript Engineer @ Emerging Cybersecurity Startup — Small team/big results. Fun + flexible + always interesting. Come build our award-winning, all-in-one cybersecurity platform.

Defendify

????‍???? Got a job listing to share? Here’s how.

???? Wise Words of the Week

A reminder from Vue.js’s Evan You that we live in a vast and varied world, including in the JavaScript ecosystem:

JavaScript sans build systems?

#​626 — February 17, 2023

Read on the Web

JavaScript Weekly

Writing JavaScript Without a Build System — Using a variety of build tools for things like bundling and transpiling is reasonably standard in modern JavaScript development, but what if you want to keep things simple? For simple things, it’s not necessary, says Julia. This led to a lot of discussion on Hacker News.

Julia Evans

Ryan Dahl, Node.js Creator, Wants to Rebuild the Runtime of the Web — A neat bit of journalism about the alternative JavaScript runtime Deno and what Ryan Dahl is trying to achieve with it and how Ryan handled the stress of being known as the creator of Node.js.

Harry Spitzer / Sequoia

Broadcasting a Live Stream With Nothing but JavaScript — Live streams typically use third-party software to broadcast, but with Amazon Interactive Video Service, you can build a powerful, interactive broadcasting interface with the Web Broadcast SDK and JavaScript. Click here to learn more.

Amazon Web Services (AWS) sponsor

core-js’s Maintainer Complains Open Source Is ‘Broken’core-js is a popular universal polyfill for JavaScript features and its author has run into his fair share of bad luck which has culminated in this lengthy post on the state of the project, his issues in securing an income and, well, the downsides to living in Russia. The Register has tried to balance out the story.

The Register

IN BRIEF:

🐒 The just released Firefox 110 for Android now supports Tampermonkey, an extension for running JavaScript ‘userscripts’ on sites you visit.

The Angular project is taking steps to revamp its reactivity model to enable fine-grained change detection via signals.

The latest beta of iOS and iPadOS 16.4 supports the Web Push API for home screen webapps.

🐦 A fun Twitter thread where Qwik’s Miško Hevery attempted to demonstrate why a = 0-x is about 3-10x faster than a = -x before being told about a flaw in his benchmark. There is still a performance difference, though.

▶️ The React.js documentary we mentioned last week has now been released and it’s a heck of a watch – you’ll need 78 minutes of your time though.

RELEASES:

Node.js 19.6.1, 18.14.1, 16.19.1 and 14.21.3.

JavaScript Obfuscator 4.0 – Code scrambler.

Shoelace 2.1
↳ Framework agnostic Web components.

Mermaid 9.4
↳ Text to diagram generator. Now with timeline diagram support.

Cypress 12.6

📒 Articles & Tutorials

Use a MutationObserver to Handle DOM Nodes that Don’t Exist Yet — Comparing the effectiveness of the MutationObserver API with the conventional method of constantly checking for the creation of nodes.

Alex MacArthur

Well-Known Symbols in JavaScript — Hemanth, a TC39 delegate, shows off 14 symbols and where they can come in useful.

Hemanth HM

🚀 Monitor and Optimize Website Speed to Rank Higher in Google — Monitor Google’s Core Web Vitals and optimize performance using in-depth reports built for developers. Improve SEO & UX.

DebugBear sponsor

Why to Use Maps More and Objects Less — A journey down a performance rabbit hole.

Steve Sewell

Adopting React in the Early Days — A personal history lesson providing context around React’s evolution. While React might be an obvious, even safe, choice now, that wasn’t always true.

Sébastien Lorber

An Animated Flythrough with Theatre.js and React Three Fiber — How to fly through a 3D scene using the Theatre.js JavaScript animation library and the React Three Fiber 3D renderer. This is the sort of thing that used to be Very Difficult™ but is now relatively trivial.

Andrew Prifer (Codrops)

How to Change the Tab Bar Color Dynamically with JavaScript

Amit Merchant

Is Deno Ready for Primetime? One Dev’s Opinion

Max Countryman

Using Playwright to Monitor Third-Party Resources That Could Impact User Experience

Stefan Judis

🛠 Code & Tools

Dependency Cruiser: Validate and Visualize JavaScript 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.

Sander Verweij

Devalue: Like JSON.stringify, But..“Gets the job done when JSON.stringify can’t.” Namely, it can handle cyclical and repeated references, regular expressions, Map and Set, custom types, and more.

Rich Harris

🧡 JavaScript Scratchpad for VS Code (2m+ Downloads) — Get Quokka.js ‘Community’ for free: #1 tool for exploring/testing JavaScript with edit-continue experience to see realtime execution and runtime values.

Wallaby.js sponsor

NodeGUI: Build Native Cross-Platform Desktop Apps with Node.js — Unlike Electron which leans upon webviews and HTML, NodeGui uses a Qt based approach. This week’s 0.58.0 release is the first stable release based on Qt 6 and offering high DPI support.

NodeGui

DOMPurify 3.0: Fast, Tolerant XSS Sanitizer for HTML and SVG — A project that’s nine years old today but still actively developed. Supports all modern browsers (IE support was only just dropped) and is heavily tested. There’s a live demo here.

Cure53

Pythagora: Generate Express Integration Tests by Recording Activity — This is a neat idea still in its early stages. Add a line of code after setting up an Express.js app and this will capture app usage and generate integration tests based on the interactions. (▶️ Screencast demo.)

zvone187 and LeonOstrez

Try Stream’s Free Trial of SDKs for In-App Chat

Stream sponsor

grep.app: Search Code Across a Half Million GitHub Repos — A code search engine that lets you use regexes or syntax in your search. Considering what it is, it’s pretty fast and has an extensive index (over half a million public repos from GitHub, allegedly).

grep.app

tsParticles: Particles, Confetti and Fireworks for Your Pages — Create customizable particle related effects for use on the Web. Uses the regular 2D canvas for broad support.

Matteo Bruni

💻 Jobs

Software Engineer — Join our happy team. Stimulus is a social platform started by Sticker Mule to show what’s possible if your mission is to increase human happiness.

Stimulus

Find JavaScript Jobs with Hired — Hired makes job hunting easy-instead of chasing recruiters, companies approach you with salary details up front. Create a free profile now.

Hired

QUICK RELEASES:

Minimatch 6.2
↳ Glob matcher library, as used in npm.
    minimatch(“bar.foo”, “*.foo”)

React Accordion 1.2
↳ Unstyled WAI-ARIA-compliant accordion library.

ScrollTrigger 1.0.6
↳ Have your page react to scroll changes.

VeeValidate 4.7.4
↳ Popular Vue.js form library

Express Admin 2.0
↳ Admin interface for data in MySQL/Postgres/SQLite.

Execa 7.0
↳ Improved process execution from Node.js.

React Tooltip 5.8