Test-Driven React

What’s Not in This Book

This is not an introduction to JavaScript. If you’re new to the language, or if you just want a refresher, I highly recommend Kyle Simpson’s excellent You Don’t Know JS^[2] series. Most of the code in this book will employ features added to the language as part of the ECMAScript 6 (also known as ES6 or ES2015) standard. Here’s a quick test:

const stringifyAll = (...args) => args.map(String);

If any of that syntax is confounding, you’ll find clarity in the ES6 & Beyond volume of Simpson’s book series.

Some familiarity with React is helpful, but not required. I’ll give a brief explanation for each React concept we encounter. If you want a more thorough introduction, pick up Ludovico Fischer’s React for Real.^[3]

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