select

<form class="layui-form" action="">
  <div class="layui-form-item">
    <label class="layui-form-label">选择框</label>
    <div class="layui-input-block">
      <select name="city" lay-verify="required" lay-filter="test">
        <option value=""></option>
        <option value="0">北京</option>
        <option value="1">上海</option>
        <option value="2">广州</option>
        <option value="3">深圳</option>
        <option value="4">杭州</option>
      </select>
    </div>
  </div>
</form>
<script>
  layui.use('form', function () {
    var form = layui.form;
    form.on('select(test)', function (data) {        //对应lay-filter
      value = data.value;                                   //获取value值
      text = data.elem[data.elem.selectedIndex].text;;    //获取显示的值
      console.log(value);
      console.log(text); 
    });
  });
</script>