Adding a new method to the built-in object using the prototype attribute in Javascript

Source: Internet
Author: User

Adding a new method to the built-in object using the prototype attribute in Javascript

This example describes how to add a new method to a built-in object using the prototype attribute in Javascript. Share it with you for your reference. The specific implementation method is as follows:

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<Html xmlns = "http://www.w3.org/1999/xhtml">

<Head>

<Meta http-equiv = "Content-Type" content = "text/html; charset = UTF-8"/>

<Title> use the prototype attribute (Add a new method to the built-in object for easy calling) </title>

<Script type = "text/javascript">

Function getMaxFunc (){

Var max = this [0];

For (var I in this ){

If (max <this [I]) {

Max = this [I];

}

}

Return max;

}

Array. prototype. getMax = getMaxFunc;

// Array is a built-in Javascript Object. Here, prototype is used to define a new method getMax.

Var myArr = [3, 5, 6, 7, 9];

Var max = myArr. getMax ();

// Here you can use myArr. getMax directly, just like using the built-in object method.

Alert ("max =" + max );

</Script>

</Head>

<Body>

</Body>

</Html>

I hope this article will help you design javascript programs.

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