Description

The prototype property allows the addition of properties and methods to an object.

This property has the form:

object.prototype.name=value

Note: Prototype is a global property which is available with almost all JavaScript objects.

Examples

The following example shows the basic use of this property.

<script>
function employee(f_name, l_name, hire_date)
{
  this.f_name = f_name;
  this.l_name = l_name;
  this.hire_date = hire_date;
}

var jsmith = new employee("John", "Smith", "06/07/2007");

employee.prototype.salary = null;
jsmith.salary = 56000;

document.write(jsmith.f_name);
document.write("<br />");
document.write(jsmith.l_name);
document.write("<br />");
document.write(jsmith.hire_date);
document.write("<br />");
document.write(jsmith.salary);
</script>

This produces the following result:

Browser Support

Firefox	IE	Chrome	Opera	Safari