JavaScript: The Definitive Guide

24.22. Boolean.valueOf( ): the boolean value of a Boolean object

ECMAScript v1: Overrides Object.valueOf( )

24.22.1. Synopsis

b.valueOf( )

24.22.1.1. Returns

The primitive boolean value held by the Boolean object b.

24.22.1.2. Throws

TypeError

If this method is invoked on an object that is not a Boolean.