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jQuery模擬select實現(xiàn)下拉菜單功能

 更新時間：2016年06月20日 10:16:56   作者：沫魚  
這篇文章主要介紹了jQuery模擬select實現(xiàn)下拉菜單功能,比較實用,需要的朋友可以參考下。

用jquery模擬一淘上面的搜索下拉的功能，利用css3做箭頭的動畫效果。

JS代碼：

/*
 * 模擬搜索下拉select
 * 默認調(diào)用方式：$(el).setSelect({
 * optionList: [], //這里是下拉的選項，如['aa','bb']
 * hiddenInput: '#optionHidden', //隱藏的input獲取選中后的值，供表單提交時傳值
 * getOption: '#sOptionBtn',
 * callback: function(option){}
 * })
 *
*/
(function ($) {
 $.fn.setSelect = function(options){
   var opt = $.extend({
    optionList: [],
    getOption: '',
    hiddenInput: '',
    callback: function(){}
   }, options || {});
  return this.each(function(){
    opt._id = this;
    var _time;
    var arrow = $(this).find('i');
    $(opt._id).append('<ul id="selectList"></ul>');
    for(var i=0;i<opt.optionList.length;i++){
       $("#selectList").append('<li>'+opt.optionList[i]+'</li>')
     };
    $(opt._id).bind({
      mouseenter: function(){
        $(arrow).addClass('arrow-hover');
        $('#selectList').slideDown();
        clearTimeout(_time);
       },
      mouseleave: function(){
        _time=setTimeout(function(){
          $(arrow).removeClass('arrow-hover');
          $('#selectList').slideUp()
         },300);
       }
     });
    //獲取選擇的值
    $('#selectList').delegate('li','click',function(){
        var option = $(this).text();
        $(opt.getOption).text(option);
        $(opt.hiddenInput).val(option);
        $('#selectList').slideUp();
        return opt.callback(option);
      });
   });
 }
})(jQuery);

demo:(只有在高級的chrome及firefox下才能看到CSS3動畫效果)

截個圖：

http://img.jbzj.com/file_images/article/201606/201606201015084.png

http://img.jbzj.com/file_images/article/201606/201606201015085.png

代碼：

<!doctype html>
<htm>
 <head>
  <meta http-equiv="Content-type" content="text/html charset=utf-8">
  <title></title>
  <style>
  body, h1, h2, h3, h4, h5, h6, hr, p, blockquote, dl, dt, dd, ul, ol, li, pre, form, fieldset, legend, button, input, textarea, th, td {
   margin: 0;
   padding: 0
  }
  body, button, input, select, textarea {
   font: 12px Arial, Helvetica, sans-serif
  }
  h1, h2, h3, h4, h5, h6 {
   font-size: 100%
  }
  code, kbd, pre, samp {
   font-family: courier new, courier, monospace
  }
  small {
   font-size: 12px
  }
  ul, ol {
   list-style: none
  }
  a {
   text-decoration: none;
   color: #333
  }
  a:hover {
   text-decoration: underline
  }
  sup {
   vertical-align: text-top
  }
  sub {
   vertical-align: text-bottom
  }
  legend {
   color: #000
  }
  fieldset, img {
   border: 0
  }
  button, input, select, textarea {
   font-size: 100%
  }
  button {
   border: 0 none;
   cursor: pointer
  }
  table {
   border-collapse: collapse;
   border-spacing: 0
  }
  em {
   font-style: normal
  }
  address {
   font-style: normal
  }
  textarea {
   resize: vertical
  }
  html {
  zoom:expression(function(ele) {
  ele.style.zoom = "1";
  document.execCommand("BackgroundImageCache", false, true)
  }
  (this))
  }/*解決IE下express重復(fù)執(zhí)行的問題*/
  article, aside, audio, canvas, command, datalist, details, embed, figcaption, figure, footer, header, hgroup, keygen, meter, nav, menu, mark, output, progress, section, source, video, address {
   display: block
  }/*html5標(biāo)簽向下兼容*/
  .clearfix:after {
   content: '\20';
   display: block;
   height: 0;
   clear: both;
   visibility: hidden
  }
  .clearfix {
  *zoom:1
  }
  .arrow-dn {
   display: inline-block;
   height: 0;
   width: 0;
   font-size: 0;
   overflow: hidden;
   border: 3px solid #505050;
   border-color: #505050 transparent transparent;
   _border-style: solid dotted dotted dotted
  }
  .top-search {
   width: 497px;
   height: 30px;
   _height: 33px;
   background: url(../images/bg.png) left top no-repeat;
   _padding-bottom: 0;
   margin-top: 20px;
   border: 3px solid #cd0001;
   border-radius: 5px;
   -webkit-border-radius: 5px;
   -moz-border-radius: 5px;
   -ms-border-radius: 5px;
   position: relative;
   z-index: 9;
   margin: 50px auto
  }
  .top-search input {
   width: 350px;
   float: left;
   padding: 7px 0;
   _padding: 6px 0;
   border: none 0;
   background: 0;
   color: #666;
   font-size: 14px
  }
  .top-search input:focus, .area-search .search-intri input:focus {
   outline: 0
  }
  .top-search button {
   width: 77px;
   height: 30px;
   line-height: 30px;
   font-weight: bold;
   font-size: 14px;
   text-align: center;
   background: #f4ac1f;
   float: right
  }
  .top-search .select {
   float: left;
   font-size: 14px;
   width: 55px;
   padding-top: 5px;
   margin-right: 5px;
   position: relative;
   z-index: 3
  }
  .top-search .select ul {
   position: absolute;
   left: -3px;
   top: 30px;
   width: 55px;
   background: #fff;
   border: 3px solid #cd0001;
   border-bottom-left-radius: 5px;
   border-bottom-right-radius: 5px;
   border-top: 0;
   line-height: 1.8;
   display: none
  }
  .top-search .select ul li {
   cursor: pointer;
   padding: 2px 0;
   padding-left: 10px
  }
  .top-search .select ul li:hover {
   background: #f3f3f3
  }
  .top-search .select .s-option {
   display: inline-block;
   position: absolute;
   top: 0;
   height: 32px;
   line-height: 28px;
   width: 45px;
   padding-left: 8px
  }
  .top-search .select a:hover {
   text-decoration: none
  }
  .top-search .select .arrow-dn {
   border-width: 4px;
   border-color: #939393 transparent transparent;
   position: absolute;
   right: 7px;
   top: 11px;
   -webkit-transition: -webkit-transform .2s ease-in-out;
   -webkit-transform: translate3d(0, 0, 999px);
   -webkit-backface-visibility: visible;
   -moz-transition: -moz-transform .2s ease-in-out;
   -moz-transform: translate3d(0, 0, 999px);
   -moz-backface-visibility: visible;
  }
  .top-search .select .arrow-hover {
   -webkit-transform: rotate(-180deg);
   -moz-transform: rotate(-180deg);
   -o-transform: rotate(-180deg);
   -webkit-transform: translated3d(0, 0, 999px);
   border-color: transparent transparent #939393\9;
   top: 10px;
   top: 7px\9;
   _top: 11px
  }
  </style>
  </head>
 <body>
  <form class="top-search clearfix">
   <!--隱藏的input獲取option值-->
   <input type="hidden" id="optionHidden" value="機構(gòu)">
   <div class="select">
    <a id="sOptionBtn" class="s-option" href="javascript:void(0)">機構(gòu)</a>
    <i class="arrow-dn"></i>
   </div>
   <input type="text" id="kw">
   <button type="submit">搜索</button>
  </form>
 <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script>
 <script>
  $(function(){
   $('.top-search .select').setSelect({
    optionList: ['機構(gòu)','課程'],
    hiddenInput: '#optionHidden',
    getOption: '#sOptionBtn',
    callback: function(option){}
   });
  });
  (function ($) {
   $.fn.setSelect = function(options){
     var opt = $.extend({
      optionList: [],
      getOption: '',
      hiddenInput: '',
      callback: function(){}
     }, options || {});
    return this.each(function(){
      opt._id = this;
      var _time;
      var arrow = $(this).find('i');
      $(opt._id).append('<ul id="selectList"></ul>');
      for(var i=0;i<opt.optionList.length;i++){
         $("#selectList").append('<li>'+opt.optionList[i]+'</li>')
       };
      $(opt._id).bind({
        mouseenter: function(){
          $(arrow).addClass('arrow-hover');
          $('#selectList').slideDown();
          clearTimeout(_time);
         },
        mouseleave: function(){
          _time=setTimeout(function(){
            $(arrow).removeClass('arrow-hover');
            $('#selectList').slideUp()
           },300);
         }
       });
      //獲取選擇的值
      $('#selectList').delegate('li','click',function(){
          var option = $(this).text();
          $(opt.getOption).text(option);
          $(opt.hiddenInput).val(option);
          $('#selectList').slideUp();
          return opt.callback(option);
        });
     });
   }
  })(jQuery);
 </script>
 </body>
</html>

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