vue操作下拉选择器获取选择的数据的id方法

<template>
  <div>
    <select v-model="select" >
      <option v-for="(a,index) in arr" :key="index" :value="a.id">{{ a.name }}</option>
    </select>
    <p>您选择的名字的Id是：{{select}}</p>
  </div>
</template>

<script>
  export default {
    data(){
      return{
        select:'',
        arr:[
          {id:'1',name:'html'},
          {id:'2',name:'css'},
          {id:'3',name:'js'},
        ] 
      }
    }
  }
</script>

let orderId=this.$route.query.id; 

this.$router.push(this.$route.query.redirect || '/login')