JavaScript与Vue实现文字滚动（跑马灯）效果详解

var value=cont.innerHTML;
var start=value.substring(0,1);//截取第一个字符串
var end=value.substring(1);//截取剩余的字符串
var result=end+start;//拼接一个新的字符串
cont.innerHTML=result;//把新字符串赋值给p标签

t=setInterval(function(){
 var value=cont.innerHTML;
 var start=value.substring(0,1);//截取第一个字符串
 var end=value.substring(1);//截取剩余的字符串
 var result=end+start;//拼接一个新的字符串
 cont.innerHTML=result;//把新字符串赋值给p标签
 },500);

clearInterval(t);

start.onclick=function(){
 clearInterval(t);//防止多次点击，而创建多个计时器
 t=setInterval(function(){
 var value=cont.innerHTML;
 var start=value.substring(0,1);//截取第一个字符串
 var end=value.substring(1);//截取剩余的字符串
 var result=end+start;//拼接一个新的字符串
 cont.innerHTML=result;//把新字符串赋值给p标签
 },500); 
 }
 stop.onclick=function(){
 clearInterval(t);
 }

<!DOCTYPE html>
<html lang="en">
<head>
 <meta charset="UTF-8">
 <meta name="viewport" content="width=device-width, initial-scale=1.0">
 <title>Document</title>
 <style>
 *{
 margin:0px;
 padding:0px;
 }
 .box{
 width:300px;
 margin:50px auto;
 }
 .content{
 margin-bottom:20px;
 }
 </style>
</head>
<body>
 <div class="box">
 <p class="content">生命永无止境~~~</p>
 <button class="start">跑马灯走起</button>
 <button class="stop">跑马灯停止</button>
 </div>
 
 <script>
 var cont=document.querySelector(".content");
 var start=document.querySelector(".start");
 var stop=document.querySelector(".stop");
 var t;
 start.onclick=function(){
 clearInterval(t);//防止多次点击，而创建多个计时器
 t=setInterval(function(){
 var value=cont.innerHTML;
 var start=value.substring(0,1);//截取第一个字符串
 var end=value.substring(1);//截取剩余的字符串
 var result=end+start;//拼接一个新的字符串
 cont.innerHTML=result;//把新字符串赋值给p标签
 },500); 
 }
 stop.onclick=function(){
 clearInterval(t);
 }
 </script>
</body>
</html>

<template>
 <div>
 <p>{{message}}</p>
 <button @click="start" class="start">跑马灯走起</button>
 <button @click="stop" class="stop">跑马灯停止</button>
 </div>
</template>
<script>
export default {
 data(){
 return{
 message:"生命永无止境~~~~",
 t:null
 }
 },
 methods:{
 start(){
 clearInterval(this.t);//防止多次点击而创建多个计时器
 this.t=setInterval(()=>{
 var start=this.message.substring(0,1);//截取第一个字符串
 var end=this.message.substring(1);//截取剩余的字符串
 this.message=end+start;
 },500)
 },
 stop(){
 clearInterval(this.t);
 }
 }
}
</script>
<style scoped>

</style>