LAYUI 多选下拉框

<div class="layui-form-item">

          <label class="layui-form-label">状态</label>

          <div class="layui-input-block">

            <select

              name="select_base_cityname"

              id="select_base_cityname"

              lay-filter="select_base_cityname"

              xm-select="select_base_cityname"

              xm-select-type="1"

            >

              <option value></option>

              <option value="待安装">待安装</option>

              <option value="待验收">待验收</option>

              <option value="已验收">已验收</option>

              <option value="已联网">已联网</option>

            </select>

          </div>

        </div>