Function.apply() : Function Object : Function JAVASCRIPT TUTORIALS

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Function.apply()

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>