#433 — April 19, 2019

Read on the Web

JavaScript Weekly

A 'Horrifying' (or Genius?) globalThis Polyfill — You wanted some gnarly JavaScript magic to chew on over the Easter weekend, didn’t you? Mathias doesn’t disappoint with this look at how to implement the proposed ‘globalThis’ feature using current JavaScript. It’s not easy.

Mathias Bynens

The Front-End Developer Handbook 2019 — This popular, detailed guide returns for another year. Updated with plenty of useful resources, learning materials and dev tools.

Cody Lindley

Cloud Hosting Developers Love — Deploy high performance web apps faster and save up to 55% compared to other cloud providers.

DigitalOcean sponsor

Razzle: Create Server-Rendered Universal Apps with No Config — It abstracts all the tooling for a universal app into a single dependency and leaves the decisions around frameworks, routing, and data fetching to you (think create-react-app but for any set of frameworks). Version 3 came out just this week introducing Babel 7 support.

Jared Palmer

V8's Blazingly Fast Parsing: How Lazy Parsing Works — A deep-down, technical post from the V8 team on how the JavaScript engine’s pre-parsing functionality works to prevent unnecessary parsing taking place before it needs to.

Toon Verwaest and Marja Hölttä

“[TDD] eliminates fear of the merge button. That reassuring coverage number gives your whole team the confidence to stop gatekeeping every little change to the codebase and let changes thrive. Removing fear of change is like oiling a machine.

Eric Elliott ponders what TDD means to him in TDD Changed My Life.

💻 Jobs

✉️ Want to Contribute to GitHub @ a Fortune 100 Company? — We live and breathe open source. Please check out our open-source on GitHub. Do you have the passion to write code with tests? Come join our team which powers the enterprise.

Software Engineer - Full Stack (JavaScript) - Berlin — Join a fast learning environment where you can extend and build upon your skills and interests.


Find a JavaScript Job Through Vettery — Vettery specializes in tech roles and is completely free for job seekers. Create a profile to get started.


📘 Tutorials and Opinions

How to Know What to Test“Given enough time and experience, you develop an intuition for knowing what to test.”

Kent C Dodds

How to Create a Multicolored Mouse Trail for Your Site — We don’t often link to visual uses of JavaScript that are just for fun but this is pretty neat. We also learn a neat trick to only run code on browsers/devices with a proper pointing device attached: matchMedia('(pointer:fine)').matches

Noah Yamamoto

Say Hello to Scheduled Stitch Triggers — MongoDB Scheduled Stitch Triggers enable you to run your functions automatically on a timed schedule. Get set up in under 3 minutes.

MongoDB sponsor

How to Build a Large Vue Application — Vue is perfect as it is for small and medium-sized apps, but you might want to lean on systems to make apps more modular at larger scales.

Michael Lin

Choosing The Right Node.js Framework: Next, Nuxt, Nest? — A handy examination of the differences between three very popular server-side rendering frameworks.

Liz Parody node

Rendering a Triangle with Vulkan and JavaScript — Vulkan is a new(ish) low-level graphics and compute API from Khronos (the folks who manage standards like OpenGL and WebGL). Here’s the Vulkan “Hello World” for Node.

Felix Maier node

Exploring the Hidden Potential of JavaScript Arrays — Aimed more at beginners, this tour visits built-in methods like flatMap, every, some and keys that are frequently overlooked.


Get the Fastest Website Deployments — Learn the most effective way to build better apps faster.

Buddy sponsor

Adding Numbers using Boolean Operations in JavaScript — This isn’t necessarily useful in and of itself, but if you’re not aware of how numbers are added at the binary level, you’ll learn something.

Sung M. Kim

🔧 Code and Tools

match-sorter: Simple, Expected, and Deterministic Best-Match Array Sorting

Kent C. Dodds

Bowser: A Browser Detector — Because “not even good modern browsers always provide good feature detection mechanisms.”

Denis Demchenko

Toast Editor: A GitHub-Flavorked Markdown/WYSIWYG Editor — A new version (1.4.0) has just dropped.


Build & Run JS Unikernels Easily In Minutes using This Free Open Source Tool

OPS sponsor

Bootbox.js: alert, confirm and Other Dialogs for Bootstrap

Nick Payne

react-jsonschema-form: A React Component for Building Forms from a JSON Schema

Mozilla Services

Octotree 3.0: A Browser Extension for Greater GitHub Code Trees — A tool that gives you an IDE-like code tree when browsing projects on GitHub.

Buu Nguyen and Contributors