Native JavaScript to implement random roll call table

This article example shares the specific code of the JavaScript random roll call table for your reference. The specific content is as follows

Effect:

Code:

<!DOCTYPE html>
<html>
 <head>
 <meta charset="UTF-8">
 <title></title>
 <style>
  .box{
  width:300px;
  height:200px;
  border:1px solid #ccc;
  /*position: absolute;
  left:0;
  right:0;
  top:0;
  bottom:0;
  margin: auto;*/
  margin: 100px auto;
  text-align: center;
  }
  h1{
  width:150px;
  height:60px;
  line-height: 60px;
  text-align: center;
  font-size: 30px;
  background-color: red;
  margin: 10px auto;
  }
  button{
  width:100px;
  height:40px;
  background-color: dodgerblue;
  border:0;
  font-size: 24px;
  color:#fff;
  }
  
  
 </style>
 </head>
 <body>
 <div class="box">
  <h1></h1>
  <button>Start</button>
  <button>Stop</button>
 </div>
 <script>
  var h1=document.getElementsByTagName('h1')[0];
  var btn = document.getElementsByTagName("button");
  var arr=["Su Chenxu","Zhang Zhiyang","Xiao Ming","Social Brother Kun","Yao","Jing Zhen","Jin Tao","Network Manager","Social Brother Chen","Zha Nan","Xue","Baby Man","Big Guy","Sleeping God","Long Ye","Ying Er","Northeast Baby","Ke Ke","Very Young Girl","Gou Dan","Gou Zi","Tian Jiao","Zhi Qiang","Jin Wei","Haitao","Sister Mai","Xin Feng","Sister Huan","Er Gou"];
  
  var ind = ranFun(0,arr.length-1)
  
  h1.innerHTML=arr[ind];
  var timer;
  btn[0].onclick=function(){
  clearInterval(timer)
  timer = setInterval(function(){
   h1.innerHTML=arr[ranFun(0,arr.length-1)]
  },100)
  }
  
  btn[1].onclick=function(){
  clearInterval(timer)
  }
  
  function ranFun(a,b){
  return Math.floor(Math.random()*(b-a+1)+a)
  }
 </script>
 </body>
</html>

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