select

index.html

<div id="app">
  <select v-model="number">
    <option disabled value="">select number</option>
    
    <option value="001">2020</option>
    <option value="002">2021</option>
    <option value="003">2022</option>
    
<!--<option>2020</option>
    <option>2021</option>
    <option>2022</option> -->
    
  </select>
  <h1>{{number}}</h1>
</div>

script.js

new Vue({
  el:"#app",
  data:{
    number: '',
  }
})