解决vue elementUI 使用el-select 时 change事件的触发问

<el-select v-model="level" size="mini" placeholder="请选择" :change="selectChange()">
 <el-option v-for="item in select" :key="item.value" :label="item.label" :value="item.value"></el-option>
 </el-select>

 <el-select v-model="level" size="mini" placeholder="请选择" @change="selectChange()">
 <el-option v-for="item in select" :key="item.value" :label="item.label" :value="item.value"></el-option>
 </el-select>

<div class="oneline">
     <span >用户编号</span>
     <div class="block left">
      <el-select
      :no-match-text="msg"
      :popper-append-to-body=false
      placeholder='请选择'
      v-model="value" filterable popper-class='contentadd_select' 
      ref='select'>
       <el-option
        v-for="item in users"
        :key="item.aont"
        :label="item.aont"
        :value="item.aont">
       </el-option>
      </el-select>
     </div>
    </div>

this.$refs.select.$refs.reference.$refs.input.onblur = ()=>{
    let haveitem=0;
    for(let i=0;i<this.users.length;i++){
     if(this.$refs.select.query==this.users[i].aont){
      haveitem++;
     }
    }
    if(!haveitem){
     this.value='无匹配数据'
     // this.msg=' '
    }
  }