~~~ <div id="app"> <p @click="handleClick">{{sum}}</p> </div> var vm =new Vue({ el:"#app", data:{ num1:10, num2:20 }, computed:{ sum:{ get(){ return this.num1+this.num2 }, set(value){ var arr = value.split(" "); this.num1 = arr[0]+"num1"; this.num2 = arr[1] } } }, methods:{ handleClick(){ this.sum = "hello world" } } }) ~~~