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The valueOf() method returns the primitive value of a Boolean object.

Syntax

bool.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

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

Document Tags and Contributors

 Contributors to this page: eduardoboucas, fscholz, Mingun, Sheppy, evilpie, Yuichirou, Thammi, Maian, Marcoos, Dria
 Last updated by: eduardoboucas,