JavaScript: Boolean Object

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

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

Type

Type of Boolean is a function.

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

Parent

Parent of Boolean is Function.prototype.

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

Purpose

Purpose of Boolean is:

• Implicitly called by JavaScript to convert value to true or false. e.g. 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