JavaScript: Boolean Object

Boolean is the value of the property key "Boolean" of the Global Object .

console.log( window.Boolean === Boolean ); // true

Type

Type of Boolean is a function.

console.log( typeof Boolean === "function" ); // true

Parent

Parent of Boolean is Function.prototype. [see Prototype and Inheritance]

console.log( Reflect.getPrototypeOf ( Boolean ) === Function.prototype ); // true

Purpose

Purpose of Boolean is:

• Implicitly called by JavaScript to convert value to true or false. example: in a if statement.
• Implicitly called by JavaScript to convert true or false to string, by first converting the value to boolean object, then use method toString.
• Has the property key "prototype" that holds valueOf and toString methods.

[see true, false]

Boolean Constructor

Boolean Constructor

Properties

• prototype