Object prototypes
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javascript Prototypes allow you to easily define methods to all instances of a particular object. Prototyping also provides the facility to add, replace, or delete methods
Syntax :
object.prototype.name = value
Example :
<html>
<head>
<script>
function book(title, author){
this.title = title;
this.author = author;
}
</script>
</head>
<body>
<script>
var myBook = new book("java", "prasun");
book.prototype.price = null;
myBook.price = 500;
document.write("Book title is : " + myBook.title + "<br>");
document.write("Book author is : " + myBook.author + "<br>");
document.write("Book price is : " + myBook.price + "<br>");
</script>
</body>
</html>
Output :
Book title is : java Book author is : prasun Book price is : 500
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