ajax 为 select 赋值

html 页面
<tr>
    <td class="dc-form-left">权限组:</td>
    <td class="dc-form-right">
        <select name="group_id" class="form-control" id="group_id" style=" 300px;">
                @if($permission_list)
                @foreach($permission_list as $val)
                 　　<option value="{{$val['id']}}" @if($group_id == $val['id'] ) selected @endif>{{$val['name']}}</option>
                @endforeach
                @endif
         </select>
     </td>
</tr>

jquery 代码

 $(document).on('change', 'select[name=type]', function(){

        $.get('/permission_list', {
          type: $('select[name=type]').val()
        }, function(res){
            var group = $("#group_id");
            group.empty();
            for(var i=0;i<res.length;i++) {
                group.append("<option value='"+res[i].id+"'>"+res[i].name+"</option>");
            }
        });

  
  });