element-UI 组件的事件中传递自定义参数

<template>  <div>           <el-select v-for="item in searchlist"   @change="changedowith(arguments,item)"  v-model="item.value" :key="item.key"  placeholder="请选择">                <el-option                  v-for="item in item.options"                  :key="item.value"                  :label="item.label"                  :value="item.value"                  >                </el-option>              </el-select>  </div></template><script>export default {  name:'sub-module-1',  data() {    return {      queryparam:{},      searchlist:[        {          key:'code',          type:'select',          options:[            {              value: 'B0002828822',              label: '产品一'            }          ],          value:''        },        {          key:'type',          type:'select',          options:[            {              value: '1',              label: '顶级'            },            {               value: '2',               label: '良好'            }          ]        }      ]    }  },  methods:{    ///param是组件change返回值     changedowith(param,itemdata){       let result=[...param];       this.queryparam[itemdata.key]=result[0];            }  },  mounted(){        },}</script>