Convert data types to boolean.
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 fornull(astypeof 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.");
}