<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>随机密码</title>
</head>
<body>
</body>
</html>
<script>
// 结果
var res = '';
// 数字+大小写字母+特殊字符
var str = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789!@#$%^&*()_+~`|}{[]:;?><,./-=';
// 设定的密码长度
var length = 8;
for (var i = 0; i < length; i++) {
var item = Math.floor(Math.random() * str.length);
res += str.charAt(item);
}
document.getElementsByTagName('body')[0].innerText = res;
console.log(res);
</script>