console 命令行工具 X clear
console
<!DOCTYPE html>
<html>
<head>
    <meta charest=“utf-8”>
    <title>js实现数字动态递增</title>
    </script>
  </head>
 <body>
 
    爱马媛媛的：<span  id=“span1”>0</span>天
  
    <script>
         var num = 0;
         var t =setInterval(function(){
          num++;
          var span1 = document.getElementById(“span1”
          sapn1.innerText = num;
             if(num==100000){
               clearInterva1(t);
        }
      },100)
      
      
   </script>
</body>
   <input type="button" value="停止" >
   
</html>