本文实例为大家分享了js实现随机点名的具体代码，供大家参考，具体内容如下
原生js实现随机点名，js部分有注释
<!DOCTYPE html>
<html lang=\"en\">
<head>
<meta charset=\"UTF-8\">
<meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">
<meta http-equiv=\"X-UA-Compatible\" content=\"ie=edge\">
<title>Document</title>
<style>
*{
padding: 0;
margin: 0;
}
.wrapper{
width: 800px;
margin: 10px auto;
border: 2px solid #ccc;
text-align: center;
}
.lucking{
width: 200px;
height: 180px;
border: 1px solid #000;
position: relative;
}
.lucking img{
position: absolute;
left: 0;
bottom: 0;
}
.wrapper ul li{
width: 100px;
height: 50px;
line-height: 50px;
text-align: center;
margin: 4px;
border:2px solid #ccc;
border-radius: 5px;
/* 不设置float:left的原因
1： 浮动不能让父盒子撑开高度
2： display:inline-block 具有行内元素的属性特征，给父盒子加text-align:center 可使其居中
*/
display: inline-block;
}
.wrapper button{
margin-top: 20px;
width: 80px;
height: 40px;
border: none;
background-color: #ddd;
border-radius: 5px;
font-weight: 700;
outline: none;
cursor: pointer;
}
.wrapper .active{
background-color: #f1084a;
font-weight: 700;
}
</style>
</head>
<body>
<div class=\"wrapper\" id=\"_wrapper\">
<ul id=\"_ul\"></ul>
<button class=\"start\">开始点名</button>
<button class=\"stop\">停止</button>
<div class=\"lucking\" id=\"_lucking\">
<p></p>
<img src=\"1.gif\" alt=\"\">
</div>
</div>
</body>
</html>
<script>
var array = [\'杨雨婷\',\'张蓓\',\'王洁\',\'邓伦\',\'李易峰\',\'杨雨婷\',\'张蓓\',\'王洁\',\'邓伦\',\'李易峰\',\'杨雨婷\',\'张蓓\',\'王洁\',\'邓伦\',\'李易峰\',\'杨雨婷\',\'张蓓\',\'王洁\',\'邓伦\',\'李易峰\',\'杨雨婷\',\'张蓓\',\'王洁\',\'邓伦\',\'李易峰\',\'杨雨婷\',\'张蓓\',\'王洁\',\'邓伦\',\'李易峰\',\'杨雨婷\',\'张蓓\',\'王洁\',\'邓伦\'];
// 获取元素
var _wrapper = document.getElementById(\'_wrapper\');
var ul = document.getElementById(\'_ul\');;
var timer = null;
init();
function init(){
// 动态创建li
for(var i = 0; i < array.length;i++)
{
var oli = document.createElement(\'li\');
oli.innerHTML = array[i];
ul.appendChild(oli);
}
// 点击
click();
}
function click(){
// 获取start按钮
var start = _wrapper.getElementsByTagName(\'button\')[0];
var stop = _wrapper.getElementsByTagName(\'button\')[1];
var lucking = document.getElementById(\'_lucking\');
// 定时器
start.addEventListener(\'click\',function(){
clearInterval(timer);
timer = setInterval(function(){
// 获得随机数
var random = Math.floor(Math.random()*array.length);
for(var i = 0;i < array.length;i++)
{
ul.children[i].className = \'\';
}
ul.children[random].className = \'active\';
},50);
});
stop.addEventListener(\'click\',function(){
clearInterval(timer);
// 找到此时的元素
var active = document.getElementsByClassName(\'active\')[0];
lucking.children[0].innerText = \"幸运儿：\" + active.innerText;
})
}
</script>
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。
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