jquery 实现的select下拉列表

浅浅的花香味﹌ 2021-07-26 19:05 458阅读 0赞

效果如下:

![20200602153152578.png][]

html

<div class="select_item">
            <label class="label">年级:</label>
            <div class="select">
              <a class="select_active block" href="javascript:;">请选择年级</a>
              <ul class="select_menu">
                <li><a class="block" href="javascript:;">一年级</a></li>
                <li><a class="block" href="javascript:;">二年级</a></li>
                <li><a class="block" href="javascript:;">三年级</a></li>
              </ul>
            </div>
          </div>

css

a {
      text-decoration: none;
    }
    
    ul,
    li,
    ol {
      list-style: none outside none;
      margin: 0;
      padding: 0;
    }
    // 引了reset.css的上面部分可以不要
    .block {
      display: block;
    }
    .select_item{
      font-size: 0;
      line-height:40px;
    }
    
    .select_item .label {
      display: inline-block;
      width: 80px;
      color: #363535;
      font-size: 12px;
      vertical-align: middle;
    }
    
    .select_item .select {
      position: relative;
      display: inline-block;
      box-sizing: border-box;
      width: 360px;
      border: 1px solid #e8e9eb;
      text-indent: 10px;
      background: #fff;
      vertical-align: middle;
    }
    
    .select_item .select .select_active {
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
      padding-right: 40px;
      color: #363535;
      font-size: 12px;
    }
    
    .select_item .select::after {
      content: "";
      position: absolute;
      display: inline-block;
      top: 50%;
      margin-top: -3px;
      right: 15px;
      width: 0;
      height: 0;
      border: 5px solid transparent;
      border-top: 7px solid #D8D8D8;
    }
    
    .select_item .select .select_menu {
      display: none;
      position: absolute;
      top: 41px;
      left: -1px;
      box-sizing: content-box;
      width: 100%;
      border: 1px solid #edf0f6;
      border-top: 0;
      z-index: 2;
      background-color: #fff;
      max-height: 201px;
      overflow-x: hidden;
      overflow-y: auto;
    }
    
    .select_item .select .select_menu li {
      height: 40px;
      line-height: 40px;
    }
    
    .select_item .select .select_menu li a {
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
      padding-right: 20px;
      color: #363535;
      font-size: 12px;
    }
    
    .select_item .select .select_menu li:hover a {
      color: #3D72ED;
      background-color: #E8E9EB;
      position: relative;
    }
    
    .select_item .select .select_menu li:hover a:after {
      content: "";
      position: absolute;
      right: 0;
      top: 0;
      width: 5px;
      height: 40px;
      background: #3d72ed;
    }

// 模拟下拉js
      $('.select').click(function(e){
        window.event? window.event.cancelBubble = true : e.stopPropagation();
        $(this).children('.select_menu').stop().slideToggle().css({'overflow':'auto'});
      })
      $('.select_menu li a').click(function(e){
        window.event? window.event.cancelBubble = true : e.stopPropagation();
        var text = $(this).text();
        $(this).parents('.select_menu').stop().slideUp();
        $(this).parents('.select_menu').prev('.select_active').text(text);
      })
      $(document).click(function () {
        $('.select_menu').stop().slideUp();
      })

[20200602153152578.png]: /images/20210726/cda5497cefb04066abde5d208207f625.png