Booleans

The Boolean is possibly the simplest and most universal data type since it's inherently tied to the 1s and 0s of binary logic. In JavaScript, a Boolean is written simply as true or false. It's not recommended to use 1 or 0 for Boolean values, as they'll be interpreted as numbers and thus fail strict equality. Boolean values are a specific data type, as opposed to in Python, where, at the core of the language, Boolean inherits from a number.

Remember in Chapter 3, Nitty-Gritty Grammar, where we learned that almost everything in JavaScript is an object? The same applies to Booleans. As you can see in the following screenshot, if you bring up the JavaScript console in your browser, chances are that it will autocomplete for you to see the methods available to you for Booleans:

Figure 4.2 – Boolean autocomplete in Chrome

Now, I doubt any of these methods are particularly useful to you, but it's a handy way to check what methods are available to you...