boolean.toString

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

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	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
ECMAScript 2017 Draft (ECMA-262) The definition of 'Boolean.prototype.toString' in that specification.	Draft

Browser compatibility

See also

• Object.prototype.toString()