JSFiddle - React, Tailwind, and code Playground

HTML

<div id="vue">
  <select v-model="selected">
    <option disabled :value="null" style="display:none">
      Select something
    </option>
    <option v-for="item in list" :value="item">{{item}}</option>
  </select>
  <div>
    Selected: {{selected || 'null'}}
  </div>
  <button @click="selected = 'two'">Set selected to "two"</button>
  <button @click="selected = null">Set selected to null</button>
</div>

JavaScript

new Vue({
	el:'#vue',
  data(){
  	return {
    	selected:null,
      list:['one','two','three']
    }
  },
  methods:{
  	log(e){
    	console.log(e)
    }
  }
})