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TWiW|5.5.19 #71

This week we take a look at the fastest way to merge arrays, Ubers new design system, writing the perfect unit test and more!

 

Enjoy 🎉

Introducing Base Web, Uber’s new design system for building websites in React
JavaScript

Introducing Base Web, Uber’s new design system for building websites in React

By Uber
Uber have hundreds of internal web applications built by different teams across the globe, this leads to a lot of repetition, to avoid this, they built a universal design system called Base Web.
React Finland 2019
JavaScript

React Finland 2019

By React Finland
Whether you were unable to make it to React Finland this year or you’d like to revisit some of the fantastic talks, they are now all available on YouTube.
Javascript Array.push is 945x faster than Array.concat
JavaScript

Javascript Array.push is 945x faster than Array.concat

By Shi Ling
If you are merging arrays with thousands of elements, it's important that you use the most performant method to do so. Shi Ling tests the two most common methods and finds out which is fastest.
The perfect unit test
Testing

The perfect unit test

By Jack Franklin
Jack Franklin discusses the characteristics of bad unit tests and how to write good ones, with clear examples to help you on your way.
via @frontendmentor
Tweet

via @frontendmentor

By 9:31 AM - 2 May 2019
Rather than guessing at screen widths to remove hover states in your #CSS, you can use the hover media query. This tests whether the device's primary input mechanism can hover over elements.
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