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jquery Parents implementation code and description

Source: Internet
Author: User
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You can see that the parent is very clear, is the current element of the parents, parents is the ancestor element of the current element. The following examples illustrate:

<div id= ' Div1 ' >
<div id= ' Div2 ' ><p></p></div>
<div id= ' div3 ' class= ' a ' ><p></p></div>
<div id= ' div4 ' ><p></p></div>
</div>

$ (' P '). Parent () takes the div2,div3,div4.
$ (' P '). Parent ('. A ') takes the Div3
$ (' P '). Parent () is Div1, which is strange, but the character of the jquery object itself determines that this is possible.
$ (' P '). Parents () The DIV1,DIV2,DIV3,DIV4 is taken.
$ (' P '). Parents ('. A ') takes the Div3

<!doctype html>
<style>

P, Div, span {margin:2px; padding:1px;}
div {border:2px white solid;}
span {cursor:pointer; font-size:12px;}
. Selected {Color:blue}
b {color:red; display:block; font-size:14px;}
</style>
<script src= "Http://code.jquery.com/jquery-1.4.4.js" ></script>
<body>
<p>
<div>
<div><span>hello</span></div>
<span>hello again</span>

</div>
<div>
<span>and Hello again</span>
</div>
</p>

<b>click hellos to toggle their parents.</b>
<script>
function showparents () {
$ ("div"). CSS Tutorial ("Border-color", "white");
var len = $ ("span.selected")
. Parents ("div")
. CSS ("Border", "2px Red Solid")
. length;
$ ("B"). Text ("Unique div parents:" + len);
}
$ ("span"). Click (function () {
$ (this). Toggleclass ("selected");
Showparents ();
});</script>

</body>

$ ("a"). Parent () will get <p>
$ ("a"). Parents () Gets the parent object as <P><DIV.3><DIV.1>
$ ("a"). Parents (). Filter ("div") will get <div.3><div.1>, and can also be written as $ ("a"). Parents ("div").
If you want to <div.2> objects can be written like this: $ ("a"). Parents ("Div:eq (0)").

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