jQuery-基本過濾選擇器

原創

2020-02-21 14:01

過濾選擇器主要是通過特定的過濾規則來篩選出所需的DOM元素，過濾規則與CSS中的僞類選擇器語法相同，即選擇器都以一個冒號（:）開頭。按照不同的過濾規則，過濾選擇器可以分爲基本過濾器、內容過濾器、可見性過濾、屬性過濾、子元素過濾和表單對象屬性過濾選擇器。

基本一些實例如下所示：

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>基本過濾選擇器</title>
    <script src="../libs/jquery.js"></script>
    <style type="text/css">
        div,span,p {
            width: 140px;
            height: 140px;
            margin: 5px;
            background: #aaa;
            border: #000 1px solid;
            float: left;
            font-size: 17px;
            font-family: Verdana;
        }
        div.mini {
            width: 55px;
            height: 55px;
            background-color: #aaaaaa;
            font-size: 12px;
        }
        div.hide{
            display: none;
        }
    </style>
</head>
<body>
<div class="one" id="one">
    id is one,class also is one
    <div class="mini">class name is mini</div>
</div>
<div class="one" id="two" title="test">
    id is two, class is one, title is test
    <div class="mini" title="other">class is mini,title is other</div>
    <div class="mini" title="test">class is mini, title is test</div>
</div>
<div class="one">
    <div class="mini">class is mini</div>
    <div class="mini">class is mini</div>
    <div class="mini">class is mini</div>
    <div class="mini"></div>
</div>
<div class="one">
    <div class="mini">class is mini</div>
    <div class="mini">class is mini</div>
    <div class="mini">class is mini</div>
    <div class="mini" title="test">class is mini, title is test</div>
</div>
<div style="display: none" class="none">
    style的display爲“none”的div
</div>
<div class="hide"> class is hide</div>
<div>
    包含input的type爲“hidden”的div
    <input type="hidden" size="8">
</div>
<span id="mover">正在執行動畫的sapn元素</span>
<script>
    /*$("div:first")//改變第一個《div》元素的背景色
            .css("background","#33FFCC");*/
    /*$("div:last")//改變最後一個div元素的背景色
            .css("background","#99CC33");*/
    /*$("div:not(.one)")//改變class不爲one的div背景色,只要class名不爲one顏色就改變
            .css("background","#CC9999")*/
    /*$("div:even")//改變索引值爲偶數的div元素的背景色
            .css("background","#FF3333");*/
    /*$("div:odd")//改變索引值爲奇數的div元素的背景色
            .css("background","#FFCC99");*/
    /*$("div:eq(3)")//改變索引值爲3的div元素背景色
            .css("background","#9900FF");*/
    /*$("div:gt(3)")//改變索引值大於3的div元素背景色
            .css("background","#996666");*/
    /*$("div:lt(3)")//改變索引值小於3的div元素背景色
            .css("background","#CC66FF");*/
    /*$(":header")//改變所有標題元素，列如h1、H2....這些元素的背景色
            .css("background","#99FF33");*/
    /*$(":animated")//改變當前正在執行動畫的元素的背景色
            .css("background","#CCCC66");*/
    $(":focus")//改變當前獲取焦點的元素的背景色
            .css("background","#CCFFCC");
</script>
</body>
</html>