SOURCE

console 命令行工具 X clear

                    
>
console
var vm = new Vue ({
  el: "#app",
  data : {
    num : 0
  },
  methods : {	
    fn : function () {
      this.num++;
    }
  }
  
  
})
<div id="app">
  <div>{{num}}</div>
  <button @click="fn">增加</button>

</div>