#346: JS oddities, V8 6.1, and an online VS Code IDE for JavaScript

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JavaScript Weekly

Issue 346 — August 4, 2017

WTFJS? A List of Funny and Tricky Code Examples
Around 40 examples of ‘quirky’ JavaScript code with unexpected results or outcomes. Mostly interesting to learn about odd edge cases.

Denys Dovhan

StackBlitz: An Online VS Code IDE for Angular + React Dev
Get the VS Code experience in your browser. Introductory post here.

Eric Simons

V8 6.1: The V8 Engine’s Newest Branch
In beta until the release of Chrome 61, 6.1 has a smaller binary, includes some significant performance improvements when iterating over maps and sets, and asm.js code is now transpiled to WebAssembly.

Mathias Bynens

Explore the Powerful Features of the Infinite ExtReact Grid
Multi-directional scrolling with a fixed header, paging, grouping and editing data in cells are just a few of the capabilities of the ExtReact grid. Try ExtReact for free to see how easy it is to add the grid and many other components into your apps.

Sencha, Inc

Nuxt.js: A Universal Vue.js Application Framework
Nuxt.js is a framework for bringing server-side rendering (SSR) to your Vue.js apps, similar to how Next.js does with React.

Olayinka Omole

How I Rediscovered My Love for JS After Ditching 90% of It
Adopting a more functional approach let the author stop using bits of JavaScript he didn’t like.

Joel Thoms

Understanding Service Workers
A practical introduction to service workers (scripts that run in the background separate from a Web page context) and how to easily create one using Ember.

Adnan Chowdhury


Lead Frontend Developer/React.js at Mosaic (New York)Be a cornerstone in the development of an innovative project management tool using cutting edge technology, React.js. Mosaic Manages Teamwork

Front End Engineer at EDITED (London)Join us to impact how the world’s biggest retailers operate by making a web app with great UX and DX using React, Redux and Glamor EDITED

Full-stack JavaScript Developer at X-Team (Remote)We are 100% remote. We’ll work with you 1-on-1 to motivate and fund you to learn, grow and build a legacy. Join X-Team. X-Team

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In Brief
TypeScript’s Type System is Turing Complete newsHenning Dieterichs
webpack Awarded $125,000 By Mozilla news To implement first-class support for WebAssembly.Sean T. Larkin
Register for the Polymer Summit in Copenhagen on 22-23 August news Learn more about the talks and workshops at this year’s Polymer Summit, and see who our amazing speakers are.Google, Inc.  Sponsor
W3C Launches a WebAssembly Working Group newsBradley Nelson
Machine Learning Comes to Your Browser with JavaScript news With a new JS library that runs Google’s TensorFlow in the browser.InfoWorld
A Look at the ‘Null Propagation Operator’ Proposal tutorial Provides an alternative to endless null checks.Nicolás Bevacqua
Creating Custom Inputs with Vue.js tutorial Understand how v-model works on native inputs and custom components.Joseph Zimmerman
A Reintroduction to ‘this’ in JavaScript tutorialZell Liew
Build your first JavaScript, Android, or iOS app with MongoDB Stitch tutorial Get started with the beta release of MongoDB’s backend-as-a-service with step-by-step tutorials and sample apps.MONGODB  Sponsor
How the Proposed ‘Class Fields’ for JavaScript Would Work tutorialDr. Axel Rauschmayer
D3 in Depth: An Intermediate Guide to Building D3 Visualizations tutorialPeter Cook
JavaScript Riddles for Fun and Profit video Poses a series of ever more challenging JavaScript riddles and brain-teasers.Dan Shappir
Use const Until You Have to Use let opinionVince Campanale
Why We Broke Our Philosophical Vows to Bring You CircleCI 2.0 storyCircleCI  Sponsor
Vuestic: A New Vue.js-Powered Admin Dashboard code Demo here.Epicmax
Express Gateway: A Microservice API Gateway Built on Express code node
Turf: A Modular (Geo)Spatial Analysis Engine codeMorgan Herlocker
Glamorous v4 Released: CSS Styling for React Components codeKent C. Dodds
ProseMirror: A Toolkit for Building Rich-Text Editors for the Web codeMarijn Haverbeke

Curated by Peter Cooper and published by Cooperpress.
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