~javascriptweekly | Issue 695 - Breaking a promise (16)

How to Annul Promises in JavaScript — You can 'cancel' XHR and fetch requests, but can you cancel regular promises? Currently, no, but Zachary looks into doing the next best thing: telling a promise the game's up, and discarding/ignoring its eventual results.

regex 2.1: Turn JavaScript's Regular Expression Support Up to Eleven — From the co-author of O’Reilly’s High Performance JavaScript and Regular Expressions Cookbook comes an enhancement for JavaScript’s regex support. Supporting all of ES2024’s regex functionality, it adds support for free spacing and comments, atomic groups, regex subroutines, context-aware interpolation of RegExp instances, and more.

✂️ Cut Your QA Cycles Down to Minutes with Automated Testing — Are slow test cycles bottlenecking your dev teams' release velocity? With QA Wolf , your organization can run entire test suites in minutes, not days. Plus, get to 80% automated E2E coverage in just 4 months (zero flakes, guaranteed). Schedule a demo.

Enhancing The New York Times' Web Performance with React 18 — Last year, The New York Times set out to take full advantage of React 18 on its flagship news site. This is a tour of the challenges faced in upgrading, coupled with the significant benefits they managed to take advantage of.

How to Use a Go(lang) Library from JavaScript with WebAssembly — Compiling Go code to WebAssembly opens up some interesting opportunities in the browser.

Inside Look: How Sentry Debugs with Sentry — Join Sentry engineer Yagiz Nizipli to learn how he optimizes tasks with Sentry, saving $160K/yr. RSVP for tips & tricks!

How We Tamed Node.js Event Loop Lag — Node famously uses very few threads yet can handle a large number of clients performantly, as long as the work associated with each client is ‘small.’ When that work isn't 'small', as here, things can go off the rails quickly.

How People with Disabilities Use the Web — Describes tools and approaches that disabled people use to interact with the Web and the barriers these people face. Of interest are the user personas that show the range of specific people’s experiences.

A Set of Modern Web Performance Guides — A helpful collection of guides, covering things such as working with the different core web vitals, JavaScript optimization, metrics, and more.

BWIP-JS: A Barcode Writer in Pure JavaScript — A library that can generate barcodes using over 100 different barcode types and standards, both single and two dimensional. There is, of course, a live demo where you, too, can discover far more types of barcodes exist than you ever imagined.

Superstruct 2.0: Define Interfaces to Validate Data at Runtime — Designed for validating data at runtime with an annotation API inspired by TypeScript, Flow, Go and GraphQL. GitHub repo.

Software Consultants Your Team Actually Wants to Work with 🥳 — Test Double solves tough problems from strategy to execution. Weekly rates. Open contracts. No management required.

Termino.js 2.0: Create Terminal-Like Experiences in the Browser — No dependencies, customizable, and you can create multiple terminal instances on a single page. Demos.

Flitter: A Flutter-Like JavaScript Data Visualization Framework — Boasts a declarative syntax and support for both SVG and Canvas to allow you to build high-performance data visualizations, interactive charts, diagrams, and more. It’s also easy to integrates with React, Svelte, etc.

SquirrellyJS 9: A Powerful Template Engine — A modern, configurable, and fast template engine promising “the power of Nunjucks” and “the simplicity of EJS”. There’s an online playground if you want to see it in action. GitHub repo.

Sliderland: A Minimalist Coding Playground — A slider control based visualization you can code with simple formulas. We last linked to this a few years ago, but it’s still a fun way to do some quick, visual JS math experimentation. Tixy.land is along similar lines, but based on a 2D grid.