html页面

<td>
  <select class="form-control dtselect" data-rule="required" data-dtselected="<%=row.type%>" name="<%=name%>[<%=index%>][type]">
       {foreach name='typeList' id='vo'}
            <option value="{$vo.id}" {in name='key' value="<%=row.type%>" } selected{/in}>{$vo.name}</option>
       {/foreach}
   </select>
</td>

js页面

$(document).on("fa.event.appendfieldlist", ".btn-append", function (e, obj) {//绑定动态下拉组件
                Form.events.selectpage(obj);
                //编辑时选中下拉列表
                $(".dtselect").each(function () {
                    let dt = $(this).data("dtselected");
                    if (typeof (dt) != 'undefined') {
                        $(this).val(dt);
                    }
                });
            });