#465 — November 29, 2019

Read on the Web

JavaScript Weekly

▶  Faster JavaScript Apps with JSON.parse() — Did you know that JSON can be parsed more quickly than JavaScript itself? Here's how and why to consider using JSON.parse instead of normal object literals.

Mathias Bynens / Bram van Damme

It's Time to Take the State of JavaScript 2019 Survey — Now in its fourth year, the popular State of JavaScript survey returns, seeking your responses to help find out “which libraries developers want to learn next, which have the best satisfaction ratings, and much more”. Of course, we’ll share the results once they’re live, as always.

Raphaël Benitte, Sacha Greif and Michael Rambeau

Getting Started Building Apps with JavaScript — CascadiaJS just wrapped up. Take a look at the collection of articles, tutorials and podcast episodes that will help you get started building web applications with JavaScript and JS-related technologies.

Heroku sponsor

ESLint 6.7 Released — The popular linting tool includes a new way for rule authors to make suggestions for non-automatic fixes, plus there are six new rules covering things like duplicate else-ifs and grouping accessor pairs. 6.7.1 quickly followed 6.7.0 fixing a regression.


Cockatiel: A Resilience and Transient-Fault-Handling Library — This is for defining common resilience or fault handling techniques like ‘backoff’, retries, circuit breakers, timeouts, etc. and is inspired by .NET’s Polly fault handling library.

Connor Peet

The Epic List of Languages That Compile to JavaScript — JavaScript is as much a compile target as a language in its own right these days, and this extensive list on the CoffeeScript repo has been (and continues to be) updated for years. The latest addition? Fengari, a Lua VM written in JavaScript.

Jeremy Ashkenas et al.

▶  Building Promises From Scratch in a Post-Apocalyptic Future — A 20 minute screencast covering what’s involved in creating a promises implementation from scratch on top of lower level primitives (e.g. callbacks).

Low Level JavaScript

⚡️ Quick Releases

💻 Jobs

Senior Front-End Software Engineer (Vue, Nuxt, Apollo) — Join our distributed Front-End functional team in our quest to make doctors more effective using Vue, Nuxt, Apollo and Rails.


Vue Front End Lead at Valiant Finance - Sydney, Australia — FinTech based in Surry Hills looking for an experienced Vue Front End Lead to help us build our growing financial marketplace.

Valiant Finance

Find a Job Through Vettery — Make a profile, name your salary, and connect with hiring managers from top employers. Vettery is completely free for job seekers.


📘 Articles & Tutorials

An Official Style Guide for Writing Redux Code — Recommended patterns, best practices, and suggested approaches for writing Redux-based apps.


An Introduction to the Picture-in-Picture Web API — Chrome supports a ‘picture-in-picture’ mechanism for creating floating video windows that continue to play even if a user navigates to a different page. Firefox and Safari have support via proprietary APIs too.

Ayooluwa Isaiah

Black Friday Sale: Quokka.js - Rapid JavaScript Prototyping in Your Editor — Quokka displays execution results in your editor as you type. Get it now with a 50% Black Friday discount.

Wallaby.js sponsor

Understanding Streams in Node.js — Streams continue to be one of the fundamental concepts that power Node applications.

Liz Parody

Outside the Web: Emscripten Now Generating Standalone WebAssembly Binaries — A key part of both asm.js and Emscripten was the idea of compiling binaries for use on the Web using JavaScript, but now Emscripten has support for emitting WebAssembly without relying on JavaScript at all. You can, of course, interact with such output from your JavaScript code, though.

Alon Zakai

Building Animated Draggable Interfaces with Vue.js and TailwindTailwind CSS is an increasingly popular CSS framework.

Cristi Jora

Video Developer Report - Top Trends in Video Technology 2019

Bitmovin sponsor

Using Backreferences in JavaScript Regular Expressions — Backreferences allow you to use matches already made within a regex within that same regex.

stefan judis

For the Sake of Your Event Listeners, Use Web Workers“Start by identifying notably intense processes and spin up a small Web Worker for them.”

Alex MacArthur

🔧 Code & Tools

litegraph.js: A Graph Node Engine and Editor — This would be useful if you need to create an online system for users to create and manipulate graphs or interconnecting ‘nodes’ for things like graphics, audio or data pipelines, say. Live demo here.

Javi Agenjo

Duktape 2.5: A Compact, Embeddable JavaScript Engine — An ES5.1-compliant JavaScript engine focused on being very compact. If you have a C/C++ project that needs a JS engine, it’s worth a look as the duk binary runs only 350K.

Sami Vaarala

Automate and Standardize Code Reviews for JS and 29 Other Languages — Set standards on coverage, duplication, complexity, and style issues and see real-time feedback in your Git workflow.

Codacy sponsor

Scala.js 1.0.0-RC1: A Scala to JavaScript Compiler — A final 1.0 release is due in early 2020. If this area of using Scala to build front-end apps interests you, you might also like Slinky which makes writing React apps in Scala easier.

Scala Team

Ketting 5.0: A 'Generic' Hypermedia Client for JavaScript — Supports Hypertext Application Language, JSON:API, Siren, and HTTP link headers. Works in both the browser and Node.js.

Evert Pot

WebGLStudio.js: A 3D Graphics Editor in the Browser — It’s not new but its author says it’s now mature, ready to be extended, and can be used in production (although a 1.0 release is still a little way away).

Javi Agenjo

JSONCrush: Compresses JSON Into URI Friendly Strings — The results are shorter than standard URI encoding.

Frank Force