用js怎样写一个随机点名器?
发布时间:2022-03-24 14:03:54 所属栏目:语言 来源:互联网
导读:老师在课堂上,经常会随机点名学生回答问题,我们现在学习了JavaScript,那么怎样用JS来实现一个随机点名器呢?下面小编就给大家分享一个实现简单的随机点名器的代码,感兴趣的朋友就继续往下看吧。 效果: 代码: !DOCTYPE html html head meta charset=UTF
老师在课堂上,经常会随机点名学生回答问题,我们现在学习了JavaScript,那么怎样用JS来实现一个随机点名器呢?下面小编就给大家分享一个实现简单的随机点名器的代码,感兴趣的朋友就继续往下看吧。 效果: 代码: <!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>开始</button> <button>停止</button> </div> <script> var h1=document.getElementsByTagName('h1')[0]; var btn=document.getElementsByTagName("button"); var arr=["苏晨旭","张志阳","小明","社会坤哥","药","敬珍","锦涛","网管","社会辰哥", "渣男","雪","宝贝曼","大个","睡神","龙爷","英儿","东北娃","珂珂","黄花大闺女","狗蛋", "狗子","天娇","志强","晋玮","海涛","迈姐","新凤","环姐","二狗"]; 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> (编辑:帝国网站管理系统) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |