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基于jQuery排序及應用實現(xiàn)Tab欄特效

 更新時間：2022年03月20日 09:35:38   作者：小白可別不舉鐵  
這篇文章主要介紹了基于jQuery排序及應用實現(xiàn)Tab欄特效，jquery是基于JavaScript語言寫出來的一個框架，它封裝JavaScript常用的功能代碼，提供一種簡便的JavaScript設計模式，但實質(zhì)上還是js，所以JQuery也屬于網(wǎng)頁編程語言。下面更多內(nèi)容需要的小伙伴可以參考一下

一、jQuery排序

eq（）排序，可以看作是一個篩選方法

  • jQuery 中獲得的對象，內(nèi)部包含選擇的一組原生 js 對象，在 jQuery 對象中會進行一個新的大的排序，這個排序與原來的 HTML 結(jié)構(gòu)沒有關系。

所以eq() 方法在 jQuery 對象中通過下標獲取某個對象，下標是 jQuery 對象中的大的排序的下標。

//選中所有p標簽
var $ps = $("p");
//生成了一個jquery對象，內(nèi)部包含了所有的元素js對象
// 是一個類數(shù)組對象，內(nèi)部會按照獲取順序進行一個大排序
// 排序與自己原來的父級沒有關系，只與在jQuery對象中的新的位置有關

// 給指定位置對象添加顏色
$ps.eq(1).css("background-color","pink")
$ps.eq(4).css("background-color","skyblue")
$ps.eq(8).css("background-color","purple")
$ps.eq(7).css("background-color","lightgreen")
$ps.eq(10).css("background-color","orange")
//對所有獲取的元素進行了排序，跟原來的結(jié)構(gòu)沒有關系

第三組div里p標簽

<div class="b3">
? ? ?<p></p>
? ? ?<p class="b2p"></p>
? ? ?<p></p>
? ? ?<p></p>
? ? ?<p></p>
</div>
----------
<script>
? // 通過類名選中標簽
? $(".b2p").eq(2).css("background-color","red")
? //得到第3組類名為b2p的 p 標簽，讓它變成紅色
</script>

二、index（）方法

  • jQuery 對象調(diào)用index() 方法時，得到的是它自己在 HTML 結(jié)構(gòu)中的兄弟中的下標位置。與新生成的jQuery 對象內(nèi)部的大排序沒有關系。
  • 它依賴于自身元素在父級中同級元素之間的位置
//index（） 兄弟中的排序
$ps.click(function(){
? //點擊輸出自己的index值
? console.log($(this).index());
})

上圖為依次點擊圖中p標簽后，所顯示結(jié)果

  jQuery中設置排他方法，在jQuery中可以通過this特殊設置進行鏈式調(diào)用，讓兄弟通過siblings方法，批量設置成默認效果。

三、應用：Tab欄特效中的排他

  • 自己的級別的排他：給自己this添加（要添加的屬性）類名，讓其他的兄弟刪除該類名。
  • 對應的部分的排他：給對應位置的元素添加 （要添加的屬性）類名，其他兄弟刪除該類名。
  • 找對應關系，使用的是自己的index（）下標，讓另一組中下標相同的項作為對應項。
  • 通過選中另一組的對應項利用eq（）方法選擇下標項。

html部分：

<style>
? *{
? ? ?margin: 0;
? ? ?padding: 0;
? ?}
? ul{
? ? ?list-style: none;
? ?}
?.tab{
? ? ? width: 360px;
? ? ? height: 200px;
? ? ? border-top: 2px solid #206f96;
? ? ? margin: 100px;
? ? ? float: left;
? ? }

?.tab .title{
? ? ? width: 360px;
? ? ? height: 40px;
? ? ? overflow: hidden;
? ?}
?.tab .title span{
? ? ?float: left;
? ? ?width: 88px;
? ? ?height: 38px;
? ? ?border: 1px solid #52819c;
? ? ?border-bottom: 1px solid #52819c;
? ? ?background-color: #c0f3f7;
? ? ?font: 16px/34px "SunSim";
? ? ?text-align: center;
? ? }
? .tab .title span.current{
? ? ?height: 40px;
? ? ?background-color: rgb(255, 255, 255);
? ? }
?.tab .title span a{
? ? ?color: rgb(34, 34, 34);
? ? ?text-decoration: none;
? ?}
?.tab .detail{
? ? ? height: 258px;
? ? ? padding: 17px 0 0 9px;
? }
?.tab .detail ul{
? ? ? display: none;
? }
?.tab .detail ul.current{
? ? ?display: block;
?}
?.tab .detail ul li a{
? ? color: #000;
? ? text-decoration: none;
?}
?.tab .detail ul li.first{
? ? font-weight: bold;
?}
? </style>
</head>
<body>
? <div class="tab">
? ? ?<div class="title">
? ? ? ? <span class="current"><a href="#" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" >上路</a></span>
? ? ? ? <span><a href="#" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" >中路</a> / <a href="#" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" >輔助</a></span>
? ? ? ? <span><a href="#" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" >打野</a></span>
? ? ? ? <span><a href="#" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" >下路</a></span>

? ? </div>
? ?<div class="detail">
? ? ? <ul class="current">
? ? ? ? ?<li class="first"><a href="#" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" >夏侯惇</a></li>
? ? ? ? ?<li><a href="#" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" >李信</a></li>
? ? ? ? ?<li><a href="#" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" >曜</a></li>
? ? ? ? ?<li><a href="#" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" >呂布</a></li>
? ? ?</ul>
? ? ?<ul>
? ? ? ? <li class="first"><a href="#" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" >上官婉兒</a></li>
? ? ? ? <li><a href="#" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" >弈星</a></li>
? ? ? ? <li><a href="#" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" >甄姬</a></li>
? ? ? ? <li><a href="#" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" >女媧</a></li>
? ? ?</ul>
? ? ?<ul>
? ? ? ? <li class="first"><a href="#" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" >趙云</a></li>
? ? ? ? <li><a href="#" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" >露娜</a></li>
? ? ? ? <li><a href="#" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" >娜可露露</a></li>
? ? ? ? <li><a href="#" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" >夏侯惇</a></li>
? ? ?</ul>
? ? ?<ul>
? ? ? ? <li class="first"><a href="#" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" >后羿</a></li>
? ? ? ? <li><a href="#" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" >虞姬</a></li>
? ? ? ? <li><a href="#" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" >狄仁杰</a></li>
? ? ? ? <li><a href="#" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" >魯班</a></li>
? ? ?</ul>
? </div>
?</div>
</body>

script部分:

<script src="../jq/jquery-1.12.4.min.js"></script>
<script>
? //獲取元素
? var $spans = $(".tab .title span");
? //添加鼠標移上事件
? $spans.mouseenter(function(){
? ? // 存儲對應span下標的下標值，后面需要找到對應的ul
? ? var ind = $(this).index();
? ? // 自己級別的排他?
? ? //$(this).addClass("current").siblings().removeClass("current");
? ? $(".tab .detail ul").eq(ind)
? ? .addClass("current").siblings().removeClass("current")
? ? ? ? ? ?
? ? </script>

    上面的方法在一個tab欄中效果實現(xiàn)沒有問題， 但是當頁面有多個tab欄時，jQuery對象中大排序和index獲取的順序就會不統(tǒng)

出現(xiàn)問題

  解決方法：span和ul的查找全部使用鏈式調(diào)用，通過節(jié)點關系查找

<script src="../jq/jquery-1.12.4.min.js"></script>
<script>
? ?// 查找所有對應ul時，不要單獨選擇所有的ul，通過當前的 this 的節(jié)點關系查找
? ?// 鏈式調(diào)用的方式，找到自己父級中的兄弟中的所有子級
? $(this).addClass("current").siblings().removeClass("current")
? .parent().siblings().children().eq(ind).addClass("current")
? .siblings().removeClass("current");
? // title的兄弟detail
? })
</script>

jQuery 對象進行的操作都是批量操作，批量操作只能執(zhí)行一些簡單的效果，如果想對 JQ 對象中的每一個元素以及內(nèi)部的后
代元素進行一些復雜操作，程序很難執(zhí)行

each（）遍歷

each（）的參數(shù)是一個函數(shù)

作用：對jQuery對象中的元素每一個都執(zhí)行函數(shù)內(nèi)部的操作

each方法基本原理就是for循環(huán)，從對象的下標為0的項一直遍歷到最后一項，然后對每一項進行操作

優(yōu)點：

each的函數(shù)內(nèi)部也有一個this，指向的是進來遍歷的每一次的元素。

<body>
?<div class="box">
? ? <p></p>
? ? <p></p>
? ? <p></p>
? ? <p></p>
? ? <h2>h2</h2>
?</div>
?<div class="box">
? ? ? <p></p>
? ? ? ?<p></p>
? ? ? ?<p></p>
? ? ? ? <p></p>
? ? ? ? <h2>h2</h2>
? </div>
? ?
</body>
? ?
<script src="../jq/jquery-1.12.4.min.js"></script>
<script>
var $box = $(".box");
//每個div內(nèi)的第二個p添加紅色
$box.each(function(){ ?
? ?$(this).children().eq(1).css("background-color","pink");
})
</script>

each的函數(shù)可以傳一個參數(shù)i，i表示的是這一次的遍歷對象在整體的jQuery對象大排序中的下標位置

? //通過each()操作
$ps.each(function(i){
?// i 記錄的是這一次遍歷時，當前元素在jQuery對象大排序中的位置
? ? ?$(this).click(function(){
? ? ?console.log($(this).index())
? ? ?//這個內(nèi)部的this是事件源
? ? console.log(i);
? ? ?})
?})

同理，如果想實現(xiàn)表格隔列變色的話，依靠jQuery大排列順序來實現(xiàn)奇偶不同變色的話，后期若給表格再添加列，都會出現(xiàn)問題，無法對應。所以使用each（）方法，將每一行作為一個操作單元，讓每一行中的列進行隔列變色

var $trs = $("tr");
$trs.each(function(){
? ? $(this).children(":odd").css("background-color","skyblue");
})

另一種方法就是使用td判斷，只要不使用jQuery的大排序，就不會影響后期插入列

$("td").each(function(){
? ? //判斷當前td在父級中所處的位置
? ? if($(this).index() % 2 == 0){
? ? ? ?$(this).css("background-color","skyblue");
? ? }
})

到此這篇關于基于jQuery排序及應用實現(xiàn)Tab欄特效的文章就介紹到這了,更多相關jQuery實現(xiàn)Tab欄特效內(nèi)容請搜索腳本之家以前的文章或繼續(xù)瀏覽下面的相關文章希望大家以后多多支持腳本之家！

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