参考网址
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<head><title>倒计时示例</title>
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<body><h1 id="titleCountDown"></h1><div id="countdown"></div><script>// 目标日期var targetDate = new Date("2024-10-11T15:40:00");const year = targetDate.getFullYear();const month = targetDate.getMonth() + 1;const day = targetDate.getDate();const hours = targetDate.getHours();const minutes = targetDate.getMinutes();const seconds = targetDate.getSeconds();document.getElementById("titleCountDown").innerHTML = `距离${year}-${month}-${day} ${hours}:${minutes}:${seconds}还有：`var timer = null;// 更新倒计时function updateCountdown() {var now = new Date();var timeLeft = targetDate - now;if (timeLeft < 0) {document.getElementById("countdown").innerHTML = "时间已过";return;}// 计算剩余的天、小时、分钟和秒var days = Math.floor(timeLeft / (1000 * 60 * 60 * 24));var hours = Math.floor((timeLeft % (1000 * 60 * 60 * 24)) / (1000 * 60 * 60));var minutes = Math.floor((timeLeft % (1000 * 60 * 60)) / (1000 * 60));var seconds = Math.floor((timeLeft % (1000 * 60)) / 1000);// 更新页面上的倒计时显示document.getElementById("countdown").innerHTML = days + "天 " + hours + "小时 " + minutes + "分钟 " + seconds + "秒";// 每秒钟更新一次倒计时timer && clearTimeout(timer);timer = setTimeout(updateCountdown, 1000);}// 启动倒计时updateCountdown();</script>
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