<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>跑马灯轮播</title> <script src="js/vue.js"></script> </head> <body> <div id="app" align="center"> <input type="button" value="我飘过" @click="start" > <input type="button" value="腿断了" @click="stop"> <h4>{{msg}}</h4> </div> <script> var vm = new Vue({ el: '#app', data: { msg: '我是跑马灯，你过来呀', //定时器 intervalId: null }, methods: { start(){ //如果当前为start，再点击start，则无效，只有当点击stop后再点击start才有效 if(this.intervalId !=null) return; //启动计时器 this.intervalId = setInterval(()=>{ var start = this.msg.substring(0,1); // 获取到 后面的所有字符 var end = this.msg.substring(1); //前后重新拼接得到新的字符串，并赋值给 this.msg this.msg = end + start; },200)//200为间隔时间 }, stop(){ //清除定时器 clearInterval(this.intervalId) //将定时器id重置为null this.intervalId = null; } } }) </script> </body> </html>