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    Boolean.prototype

    Summary

    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.
    Properties inherited from Object:

    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. Standard Initial definition. Implemented in JavaScript 1.0.
    ECMAScript 5.1 (ECMA-262)
    The definition of 'Boolean.prototype' in that specification.
    Standard  
    ECMAScript 6 (ECMA-262)
    The definition of 'Boolean.prototype' in that specification.
    Release Candidate  

    Browser compatibility

    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)

    Document Tags and Contributors

    Last updated by: Mingun,