在新的一年里，HTML 新增了很多新的功能和標簽，使得我們在編寫網頁時更加方便和高效。下面是一些常用的代碼示例，讓我們一起來看看吧！
<!DOCTYPE html>
<html>
<head>
<title>Happy New Year!</title>
<meta charset="UTF-8">
</head>
<body>
<h1>2022 New Year Countdown</h1>
<p>The new year is coming in:</p>
<div id="countdown"></div>
<script>
// Set the date we're counting down to
var countDownDate = new Date("Jan 1, 2022 00:00:00").getTime();
// Update the countdown every 1 second
var x = setInterval(function() {
// Get the current time
var now = new Date().getTime();
// Find the remaining time
var distance = countDownDate - now;
// Calculate days, hours, minutes, and seconds
var days = Math.floor(distance / (1000 * 60 * 60 * 24));
var hours = Math.floor((distance % (1000 * 60 * 60 * 24)) / (1000 * 60 * 60));
var minutes = Math.floor((distance % (1000 * 60 * 60)) / (1000 * 60));
var seconds = Math.floor((distance % (1000 * 60)) / 1000);
// Display the countdown
document.getElementById("countdown").innerHTML = days + "d " + hours + "h "
+ minutes + "m " + seconds + "s ";
// If the countdown is over, display "Happy New Year!"
if (distance <= 0) {
clearInterval(x);
document.getElementById("countdown").innerHTML = "Happy New Year!";
}
}, 1000);
</script>
</body>
</html>在上面的代碼中，我們使用了一些新的 HTML5 標簽和屬性，比如 meta 標簽中的 charset 屬性來指定頁面的字符編碼，以及使用了 JavaScript 來實現倒計時功能。
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