>實現效果  >html代碼 ``` <div id="app"> <button v-on:click="start">浪起來</button> <button v-on:click="pause">低調</button> <h1>{{msg}}</h1> </div> ``` >js代碼 ``` var vm = new Vue({ el: '#app', data: { msg: '猥瑣發育，別浪~!', timer: null, }, methods: { start(){ // var _this = this; /* 消除多次點擊加速*/ if(this.timer !=null){ return; } this.timer = setInterval(()=>{ var start = this.msg.substring(0, 1); var end = this.msg.substring(1); this.msg = end + start; }, 400); }, pause(){ clearInterval(this.timer); this.timer = null } } }) ```