Before we get into the code, I think it's important to go over different JavaScript Versions and how they'll be used in the book. I'd also like to go over how I'll present examples that require tooling.
JavaScript Versions and tools
JavaScript Versions
As you may be aware, there's been a lot of work over the past few years around evolving the JavaScript programming language. Some of this work is really, really great. So great, in fact, that the dominant libraries and frameworks on the web right now are idiomatically written in versions and variations of JavaScript that aren't universally available in web browsers. Working in bleeding-edge versions of the language, including framework-specific...
