通过JavaScript脚本实现60秒倒计时
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>CountDown</title>
</head>
<body>
<span class="second">开始</span>
<script>
let second = document.querySelector(".second");
let i = 60 // 倒计时秒数
// 定时器 每隔一秒变化一次（1000ms = 1s）
let t = setInterval(countDown, 1000);
function countDown() {
console.log(i);
second.innerHTML = i;
// 60 秒倒计时结束
if (i === 0)
clearInterval(t);
i--;
}
</script>
</body>
</html>