Boolean.prototype

The Boolean.prototype property represents the prototype for the Boolean constructor.

Property attributes of `Boolean.prototype`
Writable	no
Enumerable	no
Configurable	no

Description

Boolean instances inherit from Boolean.prototype. You can use the constructor's prototype object to add properties or methods to all Boolean instances.

Properties

Boolean.prototype.constructor: Returns the function that created an instance's prototype. This is the Boolean function by default.

Methods

Boolean.prototype.toSource(): Returns a string containing the source of the Boolean object; you can use this string to create an equivalent object. Overrides the Object.prototype.toSource() method.
Boolean.prototype.toString(): Returns a string of either "true" or "false" depending upon the value of the object. Overrides the Object.prototype.toString() method.
Boolean.prototype.valueOf(): Returns the primitive value of the Boolean object. Overrides the Object.prototype.valueOf() method.

Specifications

Specification	Status	Comment
ECMAScript 1st Edition (ECMA-262)	Standard	Initial definition. Implemented in JavaScript 1.0.
ECMAScript 5.1 (ECMA-262) The definition of 'Boolean.prototype' in that specification.	Standard
ECMAScript 2015 (6th Edition, ECMA-262) The definition of 'Boolean.prototype' in that specification.	Standard
ECMAScript 2017 Draft (ECMA-262) The definition of 'Boolean.prototype' in that specification.	Draft

Feature	Chrome	Firefox (Gecko)	Internet Explorer	Opera	Safari
Basic support	(Yes)	(Yes)	(Yes)	(Yes)	(Yes)

Feature	Android	Chrome for Android	Firefox Mobile (Gecko)	IE Mobile	Opera Mobile	Safari Mobile
Basic support	(Yes)	(Yes)	(Yes)	(Yes)	(Yes)	(Yes)

License

© 2016 Mozilla Contributors
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-us/docs/web/javascript/reference/global_objects/boolean/prototype

Boolean JavaScript Property Prototype