Web/JavaScript/Reference/Global objects/Boolean/toString

The toString() method returns a string representing the specified Boolean object.

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Syntax

bool.toString()

Return value

A string representing the specified Boolean object.

Description

The Boolean object overrides the toString method of the Object object; it does not inherit Object.prototype.toString(). For Boolean objects, the toString method returns a string representation of the object.

JavaScript calls the toString() method automatically when a Boolean is to be represented as a text value or when a Boolean is referred to in a string concatenation.

For Boolean objects and values, the built-in toString() method returns the string "true" or "false" depending on the value of the boolean object.

Examples

Using toString()

In the following code, flag.toString() returns "true":

var flag = new Boolean(true);
var myVar = flag.toString();

Specifications

Specification

ECMAScript (ECMA-262)The definition of 'Boolean.prototype.toString' 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
toString	Chrome Full support 1	Edge Full support 12	Firefox Full support 1	IE Full support 3	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.toString()

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