Web/JavaScript/Reference/Global objects/Boolean/valueOf

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

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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

ECMAScript (ECMA-262)The definition of 'Boolean.prototype.valueOf' in that specification.

Browser compatibility

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.

Update compatibility data on GitHub

	Desktop						Mobile						Server
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet	Node.js
valueOf	Chrome Full support 1	Edge Full support 12	Firefox Full support 1	IE Full support 4	Opera Full support 4	Safari Full support 1	WebView Android Full support 1	Chrome Android Full support 18	Firefox Android Full support 4	Opera Android Full support 10.1	Safari iOS Full support 1	Samsung Internet Android Full support 1.0	nodejs Full support 0.1.100

Legend

Full support  

Full support

See also

• Object.prototype.valueOf()

Boolean.prototype.valueOf() by Mozilla Contributors is licensed under CC-BY-SA 2.5.