JavaScript Function call() method

The JavaScript Function call() method is used to call a function contains this value and an argument provided individually. Unlike apply() method, it accepts the argument list.

Syntax

Parameter

thisArg - It is optional. The this value is given for the call to function.

arg1,arg2,...,argn - It is optional. It represents the arguments for the function.

Return Value

It returns the result of the calling function along provided this value and arguments.

JavaScript Function call() method Example

Example 1

Let's see a simple example of call() method.

<script>
function Emp(id,name) {
  this.id = id;	
  this.name = name;
}
function PermanentEmp(id,name) {
 Emp.call(this,id,name);
}
document.writeln(new PermanentEmp(101,"John Martin").name);
</script>

Test it Now

Output:

John Martin

Example 2

Let's see an example of call() method.

<script>
function Emp(id,name) {
  this.id = id;
  this.name = name;
}
function PermanentEmp(id,name) {
 Emp.call(this,id,name);
}
function TemporaryEmp(id,name) {
 Emp.call(this,id,name);
}
var p_emp=new PermanentEmp(101,"John Martin");
var t_emp=new TemporaryEmp(201,"Duke William")
document.writeln(p_emp.id+" "+p_emp.name+"<br>");
document.writeln(t_emp.id+" "+t_emp.name);</script>

Test it Now

Output: