js實現隨機點名功能
本文實例為大傢分享瞭js實現隨機點名的具體代碼,供大傢參考,具體內容如下
效果:
PS:在原來的效果中很快的,但是不知怎麼的錄下來就變得這麼慢瞭
代碼如下:
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>隨機點名</title> <style> .box{ width: 800px; margin: 200px auto; text-align: center; } .box h2{ font-size: 55px; font-weight: 800; } .box input{ outline: none; border: none; background: blue; color: white; width: 100px; height: 50px; font-size: 15px; font-weight: 600; } </style> </head> <body> <div class="box"> <h2 id="res">請點擊下面的按鈕,開始抽獎!</h2> <input type="button" value="點擊開始" id="btn"> </div> <script> var btn= document.getElementById("btn"); var res= document.getElementById("res"); var student=["張三","李四","王二","麻子","小明","小王","小胡","小虎","狗子","多銀幣","貢子哥","劉青松","瞎子","亞索"] var flag=true; var timer=null; // btn.onclick=function(){ if(flag){ timer= setInterval(function(){ var index= getRandom(student.length-1,0) ; res.innerHTML=student[index]; },10); btn.value="點擊結束"; flag=false; }else{ clearInterval(timer); btn.value="點擊開始"; flag=true; } } function getRandom(max,min){ return Math.round(Math.random()*(max-min)+min); } </script> </body> </html>
以上就是本文的全部內容,希望對大傢的學習有所幫助,也希望大傢多多支持WalkonNet。