layui select数据回显

<select name="assistantFilter" lay-filter="assistantFilter" id="assistantFilterID">
  <option :value="item.assistant_id" v-for="item in assistantData" 
:key="item.assistant_id">{{item.nickname}}</option>
</select>


var select = document.getElementById("assistantFilterID");
//循环遍历option里面的值，然后加判断
  for(var i=0; i<select.options.length; i++){
   //如果和回显值一致则selected为true就可以了
    if(select.options[i].value == vm.cooper_situation_base.assistant_id){
      select.options[i].selected = true;
       }
     }
     layui.use('form', function(){
         var form = layui.form;
         form.render('select');
      });