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JavaScript Function call() methodThe 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
function.call(thisArg, arg1,arg2,....,argn) 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 ExampleExample 1Let'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>
Output: John Martin Example 2Let'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>
Output: 101 John Martin 201 Duke William
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