ブートストラップドロップダウン検索プラグインの使い方を詳しく解説

<link rel="stylesheet" href="css/bootstrap-select.css" rel="external nofollow" >

<select class="selectpicker" data-live-search="true" id="d1">
  <option value="-1">请选择</option>
  <option value="0">0</option>
  <option value="1">1</option>
  <option value="2">2</option>
  <option value="3">3</option>
</select>
<select class="selectpicker" data-live-search="true" id="d2">
  <option value="-1">请选择</option>
</select>

function smallScreen(){   // 个人项目中间距处理，可以省略
  if($(window).width()<768){
    $(&#39;.bootstrap-select:not([class*="col-"]):not([class*="form-control"]):not(.input-group-btn)&#39;).css({
      &#39;width&#39;:&#39;100%&#39;,
      &#39;margin-top&#39;:&#39;10px&#39;
    });
  }
}
$(function(){
var erji=[
    [&#39;海淀区&#39;,&#39;东城区&#39;,&#39;西城区&#39;], // 0
    [&#39;浦东区&#39;,&#39;金山区&#39;,&#39;黄埔区&#39;], // 1
    [&#39;台州市&#39;,&#39;杭州市&#39;,&#39;宁波市&#39;,&#39;嘉兴市&#39;], // 2
    [&#39;郑州市&#39;,&#39;洛阳市&#39;,&#39;开封市&#39;] // 3
  ];
  var yuan = &#39;<li src-index="-1" class>&#39; +   // 字符串拼接
      &#39;<a tabindex="0" data-tokens="null" role="option" aria-disabled="false" aria-selected="false">&#39; +
      &#39;<span class="text">请选择</span>&#39; +
      &#39;<span class="glyphicon glyphicon-ok check-mark"></span>&#39; +
      &#39;</a>&#39; +
      &#39;</li>&#39;;
  $(&#39;#d1&#39;).change(function(){  // 一级下拉菜单选项改变事件
    if($(this).val() === &#39;-1&#39;){
      $(&#39;#d2&#39;).prev(&#39;p.dropdown-menu&#39;).find(&#39;ul&#39;).html(yuan);
      $(&#39;#d2&#39;).html(&#39;<option>请选择</option>&#39;);
      $(&#39;.selectpicker&#39;).selectpicker(&#39;refresh&#39;);
      smallScreen();
      return;
    }
    var cityIndex = erji[ this.value ]; // 当前下标在二级对应内容
    var html = &#39;<li src-index="-1" class>&#39; +   // 下拉搜索动态加载成的标签
        &#39;<a tabindex="0" data-tokens="null" role="option" aria-disabled="false" aria-selected="false">&#39; +
        &#39;<span class="text">请选择</span>&#39; +
        &#39;<span class="glyphicon glyphicon-ok check-mark"></span>&#39; +
        &#39;</a>&#39; +
        &#39;</li>&#39;;
    var erjiOption = &#39;<option value="0">请选择</option>&#39;;  // 同事添加option
    for(var i = 0;i<cityIndex.length;i++){
      html+= &#39;<li src-index=&#39;+i+&#39;>&#39; +
          &#39;<a tabindex="0" data-tokens="null" role="option" aria-disabled="false" aria-selected="false">&#39; +
          &#39;<span class="text">&#39;+cityIndex[i]+&#39;</span>&#39; +
          &#39;<span class="glyphicon glyphicon-ok check-mark"></span>&#39; +
          &#39;</a>&#39; +
          &#39;</li>&#39;;  // 此处为了兼容ie，采用的字符串拼接而不是ES6的模板字符串。
      // 添加option
      erjiOption += &#39;<option value=&#39;+i+&#39;>&#39;+cityIndex[i]+&#39;</option>&#39;;
    }
    $(&#39;#d2&#39;).prev(&#39;p.dropdown-menu&#39;).find(&#39;ul&#39;).html(html);
    $(&#39;#d2&#39;).html(erjiOption);
    $(&#39;.selectpicker&#39;).selectpicker(&#39;refresh&#39;);
    smallScreen();
  });
});
});