SOURCE

new Vue({
  el:'#app',
  data:{
    items:[
      {message:'1'},
   	  {message:'2'}
    ],
    count:'0'
  },
  methods:{
    count:function(e){
      this.count++;
      conslo.log(e.pageX
    }
  }
})

<div id="app">
  <div v-for="item in items">{{ item.message }}</div>
  <br/>
  <div v-for="n in 5">{{n}}</div>
  <br/>
  <div v-for='(item,index) in items'>{{index}}</div>
  <br/>
  <div v-for='(item,key,index) in items'>{{key}}:{{index}}:{{item}}</div>
  <br/>
  <div>{{count}}</div>
  <button @click="count">累加</button>
</div>