From http://www.w3schools.com (Copyright Refsnes Data)

JavaScript constructor Property

String Object Reference

JavaScript String Object

Definition and Usage

The constructor property is a reference to the function that created the object.

Syntax

object.constructor

Example

Example

How we can use the constructor property:

<script type="text/javascript">

var test=new String();
if (test.constructor==Array)
{
document.write("This is an Array");
}
if (test.constructor==Boolean)
{
document.write("This is a Boolean");
}
if (test.constructor==Date)
{
document.write("This is a Date");
}
if (test.constructor==String)
{
document.write("This is a String");
}

</script>

The output of the code above will be:

This is a String

Try it yourself »

String Object Reference

JavaScript String Object

From http://www.w3schools.com (Copyright Refsnes Data)