Boolean.prototype.valueOf()
The valueOf()
method returns the primitive value of a Boolean
object.
Syntax
JavaScript
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<var>bool</var>.valueOf()
Return value
The primitive value of the given Boolean
object
Description
The valueOf
method of Boolean
returns the primitive value of a Boolean
object or literal Boolean
as a Boolean data type.
This method is usually called internally by JavaScript and not explicitly in code.
Examples
Using valueOf
JavaScript
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x = new Boolean(); myVar = x.valueOf(); // assigns false to myVar
Specifications
Specification | Status | Comment |
---|---|---|
ECMAScript 1st Edition (ECMA-262) | Standard | Initial definition. Implemented in JavaScript 1.1. |
ECMAScript 5.1 (ECMA-262) The definition of 'Boolean.prototype.valueOf' in that specification. |
Standard | |
ECMAScript 2015 (6th Edition, ECMA-262) The definition of 'Boolean.prototype.valueOf' in that specification. |
Standard | |
ECMAScript 2017 Draft (ECMA-262) The definition of 'Boolean.prototype.valueOf' in that specification. |
Draft |
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) |
See also
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/valueof