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The Val () method usage instance in jquery _jquery

Source: Internet
Author: User
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This example describes the use of the Val () method in jquery. Share to everyone for your reference. The specific analysis is as follows:

This method sets or gets the value property of the matching element.

Only elements with the value attribute can use this method. For example, the INPUT element can use this method, and the DIV element is not available.

How to use:

Usage One:

This method returns the value of the first matching element when it is not with a parameter. For example:

Copy Code code as follows:
$ ("input"). Val ()

The above code is to get the Value property of the first INPUT element.
Instance code:

Copy Code code as follows:

<! DOCTYPE html>
<meta charset= "Utf-8" >
<meta name= "Author" content= "http://www.jb51.net/"/>
<title>val () function-cloud-dwelling community </title>
<script type= "Text/javascript" src= "Mytest/jquery/jquery-1.8.3.js" ></script>
<script type= "Text/javascript" >
$ (document). Ready (function () {
$ ("button"). Click (function () {
Alert ($ ("input"). Val ());
})
})
</script>
<body>
<div>
<ul>
<li>
<input type= "text" value= "Please enter user name"/>
</li>
</ul>
</div>
<button> Click to view Effect </button>
</body>

Usage Two:

when this method has parameters, it sets the property values for all matching elements. For example:

Copy Code code as follows:
$ ("input"). Val ("This is Test script")

The above code sets the Value property values of all input elements to "this is a test script."
Instance:

Copy Code code as follows:

<! DOCTYPE html>
<meta charset= "Utf-8" >
<meta name= "Author" content= "http://www.jb51.net/"/>
<title>val () function-cloud-dwelling community </title>
<script type= "Text/javascript" src= "Mytest/jquery/jquery-1.8.3.js" ></script>
<script type= "Text/javascript" >
$ (document). Ready (function () {
$ ("button"). Click (function () {
$ ("input"). Val ("This is a test script");
})
})
</script>
<body>
<div>
<ul>
<li>
<input type= "text" value= "Please enter user name"/>
</li>
</ul>
</div>
<button> Click to view Effect </button>
</body>

I hope this article will help you with your jquery programming.

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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