We can use length to describe how to obtain the total number of elements in jquery.
In this example, the number (length) of the li element under id = "nav" UL is output)
| The Code is as follows: | Copy code |
| <! DOCTYPE html PUBLIC "-// W3C // dtd xhtml 1.0 Transitional // EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <Html xmlns = "http://www.w3.org/1999/xhtml"> <Head> <Meta http-equiv = "Content-Type" content = "text/html; charset = gb2312"/> <Title> untitled document </title> <Script src = "// ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js" type = "text/javascript"> </script> </Head> <Body> List 1: <Ul id = "nav"> <Li> ssss </li> <Li> aaaaa </li> <Li> ddddd </li> <Li> eeeee </li> </ |
|
Ul>
List2:
<Ul id = "nav2">
<Li> sssss </li>
<Li> aaaaa </li>
<Li> ddddd </li>
<Li> eeeee </li>
</Ul>
<A href = "#" id = "test" onClick = "jq ()"> jQuery </a>
<Script>
Function jq (){
Alert ($ ("# nav li"). length ();
}
</Script>
</Body>
</Html>
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