例如：哔哩哔哩网站上每次登录有一个验证码输入，且每次发送时间为60s的限制
<!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>
</head>
<body>
</body>
手机号：<input type="text" placeholder="请输入"> <button>发送</button>
<script>
var btn = document.querySelector('button');
var time = 10;
btn.addEventListener('click', function () {
this.disabled = true;
var timer = setInterval(function () {
if (time == 0) {
clearInterval(timer);
btn.disabled = false;
time = 10;
btn.innerHTML = '发送';
} else {
btn.innerHTML = "还剩" + time + "s";
time--;
}
}, 1000)
})
</script>
</html>
