What's the point of the Boolean object?

Question

I am reading through the Mozilla Manual on JavaScript, and I come to this point in my reading, Boolean object. I can\'t see a single use for them. What\'s their point? Why w

Answer 1

Boolean.prototype.bang = function() {
    return !this.valueOf();
}

true.bang(); // false

Everything in JavaScript is an object. But at the same time we also have primitives. It's really confusing, just don't overthink it.

Answer 2

Perhaps because JavaScript objects are extensible in ways that primitives aren't? (I'm just guessing here, I've never had a need for Boolean.

Answer 3

JavaScript language design has quite many dusty corners, and the Boolean is one of them; it is not used in practice.

This:

var a = [];
alert(a instanceof Array);

will tell you "true". But this:

var b = true;
alert(b instanceof Boolean);

for some reason will show "false".

In short: forget about it.