<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
* {
margin: 0;
padding: 0;
}
h2 {
text-align: center;
}
.box {
width: 600px;
margin: 50px auto;
display: flex;
font-size: 25px;
line-height: 40px;
}
.qs {
width: 450px;
height: 40px;
color: red;
}
.btns {
text-align: center;
}
.btns button {
width: 120px;
height: 35px;
margin: 0 50px;
}
</style>
</head>
<body>
<h2>小氏家族随机点名</h2>
<div class="box">
<span>名字是：</span>
<div class="qs">这里显示姓名</div>
</div>
<div class="btns">
<button class="start">开始</button>
<button class="end">结束</button>
</div>
<script>
// 数据数组
const arr = ['小帅', '小美', '小英', '小灰灰', '小小']
let n =0
// 2所以在此声明了一个变量
let random = 0
random = Math.floor(Math.random() * arr.length)
const qs = document.querySelector(`.qs`)
// 开始按钮模块
const start = document.querySelector('.start')
// 添加点击事件
start.addEventListener('click',function () {
// 1 此处用let n = set......无效，此处为局部变量，外面无法调用
n= setInterval(function() {
const random = Math.floor(Math.random() * arr.length)
qs.innerHTML=arr[random]
},35)
if (arr.length=== 1) {
start.disable = true
}
})
// 关闭按钮模块
const end = document.querySelector('.end')
end.addEventListener('click',function() {
clearInterval(n)
// 删除当前抽取的那个元素
arr.splice(random, 1)
console.log(arr);
})
</script>
<html>
