JavaScript constructor Property
 Complete Math Object Reference
Definition and Usage
The constructor property is a reference to the function that created an
object.
Syntax
Example 1
In this example we will show how to use the constructor property:
<script type="text/javascript">
var test=new Date();
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:
Example 2
In this example we will show how to use the constructor property:
<script type="text/javascript">
function employee(name,jobtitle,born)
{
this.name=name;
this.jobtitle=jobtitle;
this.born=born;
}
var fred=new employee("Fred Flintstone","Caveman",1970);
document.write(fred.constructor);
</script>
|
The output of the code above will be:
function employee(name, jobtitle, born)
{this.name = name; this.jobtitle = jobtitle; this.born = born;}
|
Try-It-Yourself Demos
constructor
- example 1
In this example we will show how to use the constructor property.
constructor - example 2
In this example we will show how to use the constructor property.
Complete Math Object Reference
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