$ ("P:eq (1)") Try It Yourself
Definitions and usage
: the EQ () selector selects the element with the specified index value.
The index value starts at 0, and the index value of all the first elements is 0 (not 1).
Often used with other elements/selectors to select elements of a specific ordinal in a specified group, such as the example above.
Grammar
$ (": EQ (Index)") parameter description
Index required. The index value of the specified element.
<!doctype html> div {width:60px; height:60px; margin:10px; float:left;
BORDER:2PX solid blue; }
. blue {Background:blue;}
</style>
<script src= "Http://code.jquery.com/jquery-1.5.js" ></script>
<body>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<script>
$ (' body '). Find ("div"). EQ (2). addclass ("Blue"); </script> </body>
Effect chart
<p style= "Color:yellow" > Fei rain </p> use EQ to get the color value of the first P tag:
$ ("P"). EQ (0). CSS Tutorial ("COLOR")//Because EQ (num) Returns a JQ object, you can use the JQ method css to get the color value of the first P tag:jquery get
$ ("P"). Get (0). Style.color//Because getting (num) returns an HTML object, the JQ object is useless at this time using the traditional HTML object method. Of course, you can also convert objects to JQ objects after get (num):
$ ($ ("P"). Get (0)). CSS ("color")--------------------------------------------------------------------------
More EQ
See
http://api.jquery.com/eq/
--------------------------------------------------------------------------
More get:
See
http://api.jquery.com/get/
EQ: Return is a jquery object function is to reduce the set of matched elements to one element. The position of this element in the set of matching elements becomes 0, and the set length becomes 1.
Get: is an HTML object array function is to obtain one of the matching elements. Num represents the acquisition of the first few matching elements.such as: HTML code
Copy code code as follows:<ul>
<li>li-1</li>
<li>li-2</li>
</ul>For example, we go through the jquery selector $ ("li") then we will have two Li elements how do I just want to choose one?
$ ("Li:eq (0)"). HTML () or $ ("li"). EQ (0). HTML () is the first Li here we will get li-1
$ ("Li:eq (1)"). HTML () or $ ("li"). EQ (1). HTML () is the second Li here we will get li-2Let's take a look at get because the get return is an HTML object so we're here
$ ("Li"). Get (0). style.color= ' Red '
The only way to use or convert a Get return object to a jquery object is to manipulate
$ ($ ("Li"). Get (0)). CSS ("Color", ' red ')Complete code
Copy code code as follows:<!doctype HTML PUBLIC "-//W3C//DTD HTML 4.0 transitional//en" >
<title> New Document </title>
<meta http-equiv= "Content-type" content= text/html; F-8 "/>
<script language=" Web Effects "src=" Js/jquery.js "></script>
<script" JavaScript " >
<!--
$ ("document"). Ready (function () {
Alert ($ ("Li:eq (1)"). html ());//Display Li-2 alert ($ ("Li:eq (0)" ). HTML ())
$ ("Li"). Get (0). style.color= ' Red ';
$ ($ ("Li"). Get (1)). CSS ("Color", ' Red ')
}
//-->
</script>
<body>
<ul>
<li>li-1</ Li>
<li>li-2</li>
</ul>
</body>
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