本文实例为大家分享了js实现简单抽奖功能的具体代码,供大家参考,具体内容如下
代码
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<!DOCTYPE html>
< html >
< head >
< meta charset = "utf-8" />
< title ></ title >
< style >
#box{
border: 1px solid aqua;
height: 100px;
width: 200px;
text-align: center;
line-height: 100px;
margin: auto;
font-size: 22px;
}
.active{
background: slateblue;
}
li{
text-align: center;
list-style:none ;
width: 40px;
height: 20px;
line-height: 20px;
border: 1px solid blue;
margin-left: 40px;
float: left;
}
ul,li
{
list-style: none;
}
#shu
{
margin: auto;
}
</ style >
</ head >
< body >
< button id = "stp" >开始</ button >< button id = "off" >停止</ button >
< div id = "box" >恭喜< span >1</ span >号 </ div >
< div id = "shu" >0</ div >< span >等奖</ span >
< ul >
< li class = "active" >1号</ li >
< li >2号</ li >
< li >3号</ li >
< li >4号</ li >
< li >5号</ li >
< li >6号</ li >
< li >7号</ li >
</ ul >
< script >
var t=null;
var ostp=document.getElementById("stp");
var ooff=document.getElementById("off");
var ospan=document.getElementsByTagName("div")[0].getElementsByTagName("span");
var oli=document.getElementsByTagName("ul")[0].getElementsByTagName("li");
var oshu=document.getElementsByClassName("shu");
function mytime(){
var n=Math.floor(Math.random()*7+1);
ospan[0].innerText=n;
ospan[1].innerText=oli[n-1].innerText;
for(let i=0;i< oli.length ;i++)
{
oli[i] .className = "" ;
}
oli[n-1] .className = "active" ;
}
function mytime2()
{
var a = Math .floor(Math.random()*3+1);
shu.innerText = a ;
}
ostp.onclick = function (){
clearInterval(t);
t = setInterval (mytime,50);
at = setInterval (mytime2,1000)
}
ooff.onclick = function (){
clearInterval(t);
clearInterval(at);
}
</script>
</ body >
</ html >
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效果
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。
原文链接:https://blog.csdn.net/Alicesa/article/details/108436659