constructor Property (Boolean)

constructor Property (Boolean)


Specifies the function that creates a Boolean.



The name of the Boolean.


Optional. Specifies the value of the Boolean. This can be the numbers 1 or 0, or the strings "true" or "false".

The constructor property contains a reference to the function that constructs instances of the Boolean object.

The following example illustrates the use of the constructor property.

var x = new Boolean("true");

if (x.constructor == Boolean)
    document.write("Object is a Boolelan.");

// Output:
// Object is a Boolean.


Supported in the following document modes: Quirks, Internet Explorer 6 standards, Internet Explorer 7 standards, Internet Explorer 8 standards, Internet Explorer 9 standards, Internet Explorer 10 standards, Internet Explorer 11 standards. Also supported Store apps (Windows 8 and Windows Phone 8.1). See Version Information.

© 2015 Microsoft