To-Bool

Convert data types to boolean.

About

This is a very basic utility library to help convert the basic JS data types to boolean. Each type is treated differently:

Boolean is returned as-is
Function is assumed to be true
Number is true for greater-or-less-than 0
Object is just cast to boolean (!!), which works for null (as typeof null === "object")
String is converted to lower-case and compared to "true" or "1"
Symbol is currently treated as always-true
Undefined is always false

If none of these types match the passed item, a TypeError is thrown.

Usage is super easy:

var toBool = require("to-bool");

if (toBool(someVariable)) {
    console.log("It's true.");
}