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



Return value

A string representing the specified Boolean object.


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.


Using toString()

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

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


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

Browser compatibility

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ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung InternetNode.js
toStringChrome Full support 1Edge Full support 12Firefox Full support 1IE Full support 3Opera Full support 4Safari Full support 1WebView Android Full support 1Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support 10.1Safari iOS Full support 1Samsung Internet Android Full support 1.0nodejs Full support 0.1.100


Full support  
Full support

See also