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In jQuery: nth-child selector usage instance, jquerynth-child
This document describes the usage of the nth-child selector in jQuery. Share it with you for your reference. The specific analysis is as follows:
This selector matches the nth child or parity element under its parent element.
The: eq (index) selector matches only one element, while the nth-child selector matches child elements for each parent element.
: Nth-child starts from 1, while: eq () starts from 0.
Syntax structure:
Copy codeThe Code is as follows: $ (": nth-child ")
This selector should also be used with other selectors, such as class selector and element selector. For example:
Copy codeThe Code is as follows: $ ("li: nth-child (2)" ).css ("color", "blue ")
The above Code sets the font color of the second li element under the parent element to blue. You can also calculate the parity child element of the parent element. For example:
Copy codeThe Code is as follows: $ ("li: nth-child (even)" ).css ("color", "blue ")
The code above can set the font color of the li element in the order of an even number under the parent element to blue.
Note:Here it is necessary to combine the above Code to describe the concept. The parent element mentioned here is not li, but the parent element of li.
Many people often mistakenly think that it is the last element in the child element that matches the li element.
Instance code:
Copy codeThe Code is as follows:
<! DOCTYPE html>
<Html>
<Head>
<Meta charset = "UTF-8">
<Meta name = "author" content = "http://www.bkjia.com/"/>
<Title>: nth-child selector-helping customers </title>
<Script type = "text/javascript" src = "mytest/jQuery/jquery-1.8.3.js"> </script>
<Script type = "text/javascript">
$ (Document). ready (function (){
$ ("Button"). click (function (){
$ ("Li: nth-child (2)" ).css ("color", "blue ")
})
})
</Script>
</Head>
<Body>
<Div>
<Ul>
<Li class = "houtai" title = "asp"> ASP tutorial </li>
<Li class = "houtai" title = "net"> ASP. NET tutorial </li>
<Li class = "houtai" title = "php">; PHP tutorial </li>
</Ul>
<Ul>
<Li class = "qiantai" title = "html"> html tutorial </li>
<Li class = "qiantai" title = "div"> DIV + CSS tutorial </li>
<Li class = "qiantai" title = "jquery"> jQUERY tutorial </li>
<Li class = "qiantai" title = "js"> jAVAScript tutorial </li>
</Ul>
</Div>
<Button> click to view results </button>
</Body>
</Html>
I hope this article will help you with jQuery programming.
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