（案例贴2） html+css 倒计时器

欢迎大家使用这个计时器噢

老哥直接附代码咯.

timer.html

<!DOCTYPE html>
<html lang="zh-CN">
<head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>为我家小仙女准备的倒计时♥</title><style>body, html {height: 100%;margin: 0;display: flex;flex-direction: column;align-items: center;justify-content: center;background-color: #f9eae1; /* 背景色为淡粉色 */font-family: 'Arial', sans-serif; /* 字体 */}#clockContainer {display: flex;flex-direction: column;align-items: center;justify-content: center;margin-bottom: 20px;background-color: #f6e1e8; /* 控制面板背景色为浅紫色 */border-radius: 20px; /* 控制面板边框圆角 */padding: 20px;box-shadow: 0px 0px 10px 0px #888888; /* 控制面板阴影效果 */}#clock strong {font-size: 150px;color: #ffa9c8;margin-bottom: 20px;}#clockControl {text-align: center;}#clockControl input {margin: 5px;padding: 10px 20px;border: none;border-radius: 10px;background-color: #ff95bf; /* 按钮背景色为浅粉红色 */color: white;font-size: 16px;cursor: pointer;transition: background-color 0.3s;}#clockControl input:hover {background-color: #ff6b9c; /* 鼠标悬停时按钮背景色变为深粉红色 */}#clockControl input:active {background-color: #ff4785; /* 按钮按下时背景色变为更深的粉红色 */}#clockControl.hidden {display: none;}</style>
</head>
<body>
<div id="clockContainer"><div id="clock"><strong>00:00:00</strong></div><div id="clockControl">时：<input id="hinput" type="text" value="00"/> 分<input id="minput" type="text" value="00"/> 秒<input id="sinput" type="text" value="00"/><br/><input id="setB" type="button" value="设置" onclick="setTime()"><input id="startB" type="button" value="开始" onclick="run()"><input id="pauseB" type="button" value="暂停" onclick="pause()"><input id="endB" type="button" value="停止" onclick="stop()"><br/><input id="hiddenB" type="button" value="隐藏控制面板" onclick="toggleVisibility()"></div>
</div><!-- 添加了 clockHidden 元素 -->
<input type="hidden" id="clockHidden" value="00:00:00"><script language="Javascript">var normalelapse = 1000;var nextelapse = normalelapse;var counter;var startTime;var finish = "00:00:00";var timer = null;var controlPanelVisible = true; // 保存控制面板的显示状态，默认为显示function toggleVisibility() {var element = document.getElementById('clockControl');if (controlPanelVisible) {element.classList.add('hidden');controlPanelVisible = false;} else {element.classList.remove('hidden');controlPanelVisible = true;}}function setTime(){startB.disabled = false;pauseB.disabled = true;setB.disabled = false;var s = sinput.value;var m = minput.value;var h = hinput.value;if(isNaN(h) || isNaN(m) || isNaN(s)){return;}var sn = new Number(s);var mn = new Number(m);var hn = new Number(h);var ss = sn < 10 ? ("0" + sn) : s;var sm = mn < 10 ? ("0" + mn) : m;var sh = hn < 10 ? ("0" + hn) : h;var init = sh + ":" + sm + ":" + ss;clock.innerHTML = "<strong>"+init+"</strong>";clockHidden.value = init;window.clearTimeout(timer);window.clearInterval(timer);}function run() {startB.disabled = true;pauseB.disabled = false;setB.disabled = true;endB.disabled = false;counter = 0;startTime = new Date().valueOf();timer = window.setInterval("onTimer()", nextelapse);}function pause() {startB.disabled = false;pauseB.disabled = true;setB.disabled = false;window.clearTimeout(timer);}function stop(){startB.disabled = false;pauseB.disabled = true;setB.disabled = false;endB.disabled = true;sinput.value = "00" ;minput.value = "00" ;hinput.value = "00" ;clock.innerHTML = "<strong>00:00:00</strong>"clockHidden.value = "00:00:00";window.clearTimeout(timer);window.clearInterval(timer);}window.onload = function() {pauseB.disabled = true;}function onTimer(){if (clockHidden.value == finish){window.clearInterval(timer);clock.innerHTML = "<strong><font color=#013878>Time's up!</font></strong>"startB.disabled = true;pauseB.disabled = true;setB.disabled = false;endB.disabled = true;return;}var hms = new String(clockHidden.value).split(":");var s = new Number(hms[2]);var m = new Number(hms[1]);var h = new Number(hms[0]);s -= 1;if (s < 0){s = 59;m -= 1;}if (m < 0){m = 59;h -= 1;}var ss = s < 10 ? ("0" + s) : s;var sm = m < 10 ? ("0" + m) : m;var sh = h < 10 ? ("0" + h) : h;var nowtime = sh + ":" + sm + ":" + ss;clock.innerHTML = "<strong>"+nowtime+"</strong>";clockHidden.value = nowtime;window.clearInterval(timer);counter++;var counterSecs = counter * 1000;var elapseSecs = new Date().valueOf() - startTime;var diffSecs = counterSecs - elapseSecs;nextelapse = normalelapse + diffSecs;if (nextelapse < 0) nextelapse = 0;timer = window.setInterval("onTimer()", nextelapse);}// 添加点击页面空白区域显示控制面板的事件监听器document.addEventListener('click', function(event) {var clockControl = document.getElementById('clockControl');var isClickInsideControl = clockControl.contains(event.target);if (!isClickInsideControl) {clockControl.classList.remove('hidden');controlPanelVisible = true;}});</script></body>
</html>

css

@import url('https://fonts.googleapis.com/css?family=Gochi+Hand:wght@400;500;600&display=swap');
html, body {display: flex;justify-content: center;align-items: center;color: hsl(198, 1%, 29%);font-family: 'Gochi Hand', cursive;text-align: center;font-size: 130%;
}* {padding: 0;margin: 0;
}/* 整个面板 */
#board {position: relative;/* 铺满整个视口 */width: 100vw;height: 100vh;background-color: #f1eee5;overflow: hidden;perspective: 1600px;display: grid;box-sizing: border-box;padding: 50px;
}/* 底图 */
.xixi{width: 720px;height: 120px;position: absolute;left: 50%;bottom: 0;transform: translateX(-50%);
}/* #region代办框start */
/* 整个代办框 */
.container {position: relative;height: 500px;width: 500px;background: #f1f5f8;/* 背景圆点绘制，每个重复的小方块大小为 25px × 25px */background-image: radial-gradient(#bfc0c1 7.2%, transparent 0);background-size: 25px 25px;border-radius: 20px;box-shadow: 4px 3px 7px 2px #00000040;padding: 1rem;box-sizing: border-box;/* 水平居中对齐 */margin: 0 auto;
}/* 标题 */
.heading {display: flex;align-items: center;justify-content: center;margin-bottom: 1rem;
}
/* To-Do List部分样式 */
.heading__title {transform: rotate(2deg);padding: 0.2rem 1.2rem;border-radius: 20% 5% 20% 5%/5% 20% 25% 20%;background-color: hsla(53, 100%, 93%, 0.708);font-size: 1.5rem;
}
/* 图片元素的宽度为父元素宽度的24% */
.heading__img {width: 24%;
}/* ~ Today I need to ~ */
.form__label {display: block;margin-top: -20px;margin-bottom: 0.5rem;
}
/* 音频 */
audio {width: 280px;height: 15px;margin: 0px auto;border: 1px solid #e0dfc6;border-radius: 8px;
}
/* 输入框 */
.form__input {box-sizing: border-box;background-color: transparent;padding: 0.3rem;/* 边框设置 */border-bottom-right-radius: 15px 3px;border-bottom-left-radius:3px 15px;border: solid 3px transparent;border-bottom: dashed 3px #c6beb1;/* 字体设置 */font-family: 'eryamaomiti', cursive;font-size: 1rem;color: hsla(260, 2%, 25%, 0.7);width: 70%;margin-bottom: 20px;/* 获得焦点时 */&:focus {/* 去掉默认的外边框样式 */outline: none;/* 框变为实线，颜色为#c6beb1 */border: solid 3px #c6beb1;}
}/* submit按钮 */
.button {padding: 0;border: none;/* 顺时针旋转4度 */transform: rotate(4deg);/* 变换的起点为中心点 */transform-origin: center;font-family: 'eryamaomiti', cursive;text-decoration: none;padding-bottom: 3px;border-radius: 5px;/* 添加一个垂直的盒子阴影效果 */box-shadow: 0 2px 0 hsl(198, 1%, 29%);/* 过渡效果的时间和缓动函数 */transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);/* Base64编码的背景图像 */background-image: url('data:image/gif;base64,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');background-color: hsla(0, 0%, 100%, 0.7);
}
/* 按钮内文本样式 */
.button span {background: #f1f5f8;display: block;padding: 0.5rem 1rem;border-radius: 5px;border: 2px solid hsl(198, 1%, 29%);
}
/* 按钮在激活状态和获取焦点时 */
.button:active, .button:focus {transform: translateY(4px);padding-bottom: 0px;outline: 0;
}/* 代办事项列表 */
.toDoList {padding-left: 2.5rem;text-align: left;
}
li {position: relative;padding-top: 0.2rem;font-size: 24px;color: #3c4654;font-family: 'eryamaomiti', cursive;
}
/* 悬停时添加删除线效果 */
li:hover {text-decoration: line-through #d5c8a0;
}/* 右下角的三个爪子 */
.cute1{position: absolute;bottom: 5px;right: 70px;width: 100px;height: 100px;
}
.cute2{position: absolute;bottom: 70px;right: 5px;width: 100px;height: 100px;
}
.cute3{position: absolute;bottom: 0;right: 0;width: 100px;height: 100px;
}
/* #endregion代办框end *//* #region便利贴start */
/* 便利贴样式 */
.stickynote {position: absolute;width: 200px;height: 200px;box-sizing: border-box;padding: 10px;transform: rotateX(5deg);box-shadow: -1px 10px 5px -4px rgba(0, 0, 0, 0.02),inset 0 24px 30px -12px rgba(0, 0, 0, 0.2);/* 之后便利贴内文本框居中 */display: flex;justify-content: center;align-items: center;
}
/* 便利贴文本框 */
.stickynote-text {border-radius: 10px;color: #686a67;font-size: 20px;font-weight: 400;border: none;background: transparent;outline: none;text-align: center;resize: none;overflow: hidden;font-family: 'eryamaomiti', cursive;
}
/* 获得焦点时 */
.stickynote-text:focus {background-color: rgba(0,0,0,0.2);
}
/* 占位符（输入文本前的文本显示） */
.stickynote-text::placeholder {color: #686a67;opacity: 30%;
}
/* #endregion便利贴end *//* #region时钟start */
.clock {margin: -80px auto;height: 10vh;color: #e2a2aca1;font-size: 10vh;font-family: 'eryamaomiti';line-height: 10vh;display: flex;position: relative;overflow: hidden;
}
.clock > div {display: flex;
}
.tick {line-height: 7vh;
}
.tick-hidden {opacity: 0;
}
/* 线性过渡，持续时间为1s */
.move {animation: move linear 1s infinite;
}
@keyframes move {from {transform: translateY(0vh);}to {transform: translateY(-10vh);}
}
/* #endregion时钟end */