June 2019
Intermediate to advanced
192 pages
4h
English
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Chapter 3Testing React with Enzyme
JavaScript web development can be divided into two eras: pre-React and post-React. Pre-React, all was chaos. Suppose you wanted to make a button toggle a popup when clicked: you’d add code somewhere—nowhere near the button markup—to add an event listener for the button click. The event listener you’d write would directly alter the DOM to show or hide the popup. Code was scattered without rhyme or reason. Unit tests were almost unheard of.
Thankfully, we live in the age of React. Now individual pieces of the app—the button and the popover, in this example—can be isolated as components. The DOM tree they render is a pure function of their props (React parlance for data provided to the component) and their internal ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.