Boolean.prototype.toString()

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

Syntax

bool.toString()

Parameters

None.

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 Status Comment
ECMAScript 1st Edition (ECMA-262) Standard Initial definition.
ECMAScript 5.1 (ECMA-262)
The definition of 'Boolean.prototype.toString' in that specification.
Standard  
ECMAScript 2015 (6th Edition, ECMA-262)
The definition of 'Boolean.prototype.toString' in that specification.
Standard  

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: fscholz, Mingun, Sheppy, evilpie, Yuichirou, Maian, Marcoos, Dria
Last updated by: fscholz,