JS & DOM Reference
OverviewJavaScript Objects
JS Array JS Boolean JS Date JS Math JS Number JS String JS RegExp JS GlobalBrowser Objects
Window Navigator Screen History LocationCore DOM Objects
DOM Node DOM NodeList DOM NamedNodeMap DOM Document DOM Element DOM AttrHTML DOM Objects
DOM Document DOM Events DOM ElementsDOM Anchor DOM Area DOM Base DOM Body DOM Button DOM Form DOM Frame/IFrame DOM Frameset DOM Image DOM Input Button DOM Input Checkbox DOM Input File DOM Input Hidden DOM Input Password DOM Input Radio DOM Input Reset DOM Input Submit DOM Input Text DOM Link DOM Meta DOM Object DOM Option DOM Select DOM Style DOM Table DOM td / th DOM tr DOM Textarea
JavaScript constructor Property
Complete Math Object Reference
Definition and Usage
The constructor property is a reference to the function that created an object.
Syntax
object.constructor
Example 1
In this example we will show how to use the constructor property:
<script>
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>
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:
This is a Date
Try it yourself »
Example 2
In this example we will show how to use the constructor property:
<script>
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>
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;}
{this.name = name; this.jobtitle = jobtitle; this.born = born;}
Try it yourself »
Complete Math Object Reference
Your suggestion:
Close [X]
Thank You For Helping Us!
Your message has been sent to W3Schools.
Close [X]
