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

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Author: User
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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.

This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to info-contact@alibabacloud.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

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