Vue.js Html Select Option Input Binding and for Rendering

<template>  <select id="inputReadType" class="form-control" v-model="readType">    <option value=""></option>    <option v-for="(item, index) in ReadType" :value="item" >{{ index }}</option>  </select></template><script>export default {  props: ['readType'],  data() {    return {      ReadType: {        TIPS: 1,        GUIDE: 2,        ATTRACTION: 3,        RESTAURANT: 4,        HOTEL: 5,        SHOPPING: 6,      }    }  },  }</script>