Function.apply() : Function Object « Function « JavaScript Tutorial






  1. JavaScript Tutorial
  2. Function
  3. Function Object

Syntax

function.apply()

The apply() method is used to apply a method of one object to another object.

Using the apply() method keeps developers from rewriting methods for different objects.

<html>
<head>
<title>Example</title>
</head>
<body>
<script type="text/javascript">
function ClassA(sColor) {
    this.color = sColor;
    this.sayColor = function () {
        alert(this.color);
    };
}

function ClassB(sColor, sName) {
    ClassA.apply(this, arguments);
    this.name = sName;
    this.sayName = function () {
        alert(this.name);
    };
}

var objA = new ClassA("red");
var objB = new ClassB("blue", "Nicholas");
objA.sayColor();
objB.sayColor();
objB.sayName();

</script>

</body>
</html>








7.2.Function Object
7.2.1.Function() (capital F)
7.2.2.Function.apply()
7.2.3.Function.arguments
7.2.4.Function.arity
7.2.5.Function.call()
7.2.6.Function.caller
7.2.7.Function.prototype
7.2.8.Function.toSource()
7.2.9.Function.toString()