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這篇文章給大家介紹使用jQuery怎么實現(xiàn)一個下拉菜單效果,內(nèi)容非常詳細,感興趣的小伙伴們可以參考借鑒,希望對大家能有所幫助。
jquery是一個簡潔而快速的JavaScript庫,它具有獨特的鏈式語法和短小清晰的多功能接口、高效靈活的css選擇器,并且可對CSS選擇器進行擴展、擁有便捷的插件擴展機制和豐富的插件,是繼Prototype之后又一個優(yōu)秀的JavaScript代碼庫,能夠用于簡化事件處理、HTML文檔遍歷、Ajax交互和動畫,以便快速開發(fā)網(wǎng)站。
<!DOCTYPE html> <html> <head lang="en"> <meta charset="UTF-8"> <title></title> <style type="text/css"> * { margin: 0; padding: 0; } ul { list-style: none; } .wrap { width: 330px; height: 30px; margin: 100px auto 0; padding-left: 10px; background-color: skyblue; } .wrap li { background-color: skyblue; } .wrap > ul > li { float: left; margin-right: 10px; position: relative; } .wrap a { display: block; height: 30px; width: 100px; text-decoration: none; color: #000; line-height: 30px; text-align: center; } .wrap li ul { position: absolute; top: 30px; display: none; } </style> <script src="http://apps.bdimg.com/libs/jquery/2.1.4/jquery.js"></script> <script> $(function () { //獲取所有l(wèi)i,添加移入事件 $(".wrap>ul>li").mouseenter(function () { //設置內(nèi)部的子元素ul slideDown $(this).children("ul").stop().slideDown(600); }); //移出li時,讓內(nèi)部子元素slideUp $(".wrap>ul>li").mouseleave(function () { $(this).children("ul").stop().slideUp(600); }); //如果當前運動沒有完畢,又添加了新的動畫,這時新的動畫需要等待當前動畫執(zhí)行完畢才會開始 //如果持續(xù)添加。一定會造成動畫的積累,這種情況我們稱為動畫隊列 }); </script> </head> <body> <div class="wrap"> <ul> <li> <a href="javascript:void(0);" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >一級菜單1</a> <ul class="ul"> <li><a href="javascript:void(0);" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >二級菜單11</a></li> <li><a href="javascript:void(0);" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >二級菜單12</a></li> <li><a href="javascript:void(0);" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >二級菜單13</a></li> </ul> </li> <li> <a href="javascript:void(0);" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >一級菜單2</a> <ul> <li><a href="javascript:void(0);" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >二級菜單21</a></li> <li><a href="javascript:void(0);" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >二級菜單22</a></li> <li><a href="javascript:void(0);" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >二級菜單23</a></li> </ul> </li> <li> <a href="javascript:void(0);" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >一級菜單3</a> <ul> <li><a href="javascript:void(0);" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >二級菜單31</a></li> <li><a href="javascript:void(0);" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >二級菜單32</a></li> <li><a href="javascript:void(0);" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >二級菜單33</a></li> </ul> </li> </ul> </div> </body> </html>
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