HTML/JS实现漂亮的时钟效果（附带源码）

实例代码如下：

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>漂亮的时钟效果</title>
<link href="https://lf3-cdn-tos.bytecdntp.com/cdn/expire-1-M/font-awesome/5.15.4/css/all.min.css" rel="stylesheet" type="text/css"><div class="digital-clock"><i class="fas fa-ellipsis-v uil uil-ellipsis-v dot-menu-btn" style="color:#fff" id="active-menu"></i><ul class="dot-menu" id="active-menu"><li class="menu-item" id="active-menu"><span class="clock-format-text" id="active-menu">24-Hour Format</span><div class="format-switch-btn" id="active-menu" date-format="12"></div></li></ul><div class="time"><span class="hours">00</span><span class="dots">:</span><span class="minutes">00</span><div class="right-side"><span class="period">AM/PM</span><span class="seconds">00</span></div></div><div class="calender"><span class="month-name">Month</span>,<span class="day-name">Day</span><span class="day-num">00</span></div>
</div>
<style>* {font-family: 'Poppins', sans-serif;margin: 0;padding: 0;box-sizing: border-box;}body {min-height: 100vh;display: flex;justify-content: center;align-items: center;background: #2e2e44;}.digital-clock {position: relative;color: #fff;background: #2e2e44;width: 425px;padding: 20px 45px;box-shadow: 0 5px 25px rgba(14, 21, 37, 0.8);border-radius: 10px;display: flex;justify-content: center;align-items: center;flex-direction: column;}.digital-clock:before {content: '';position: absolute;background: linear-gradient(45deg, #24ff6d, #2f93f1, #ff5e9a);background-size: 200% 200%;top: -5px;left: -5px;bottom: -5px;right: -5px;z-index: -1;filter: blur(40px);animation: glowing 10s ease infinite;}@keyframes glowing {0% {background-position: 0 50%;}50% {background-position: 100% 50%;}100% {background-position: 0 50%;}}.time {position: relative;display: flex;justify-content: center;align-items: center;}.hours,.dots,.minutes {display: flex;justify-content: center;align-items: center;font-weight: 600;padding: 0 10px;line-height: 125px;}.hours,.minutes {font-size: 6.5em;width: 125px;}.dots {font-size: 5em;color: #929292;}.hours {background: -webkit-linear-gradient(90deg, #634dff, #5fd4ff);-webkit-text-fill-color: transparent;-webkit-background-clip: text;}.minutes {background: -webkit-linear-gradient(90deg, #ff5e9e, #ffb960);-webkit-text-fill-color: transparent;-webkit-background-clip: text;}.right-side {position: relative;display: flex;justify-content: center;align-items: center;flex-direction: column;margin-left: 10px;}.period,.seconds {font-size: 1.2em;font-weight: 500;}.period {transform: translateY(-20px);background: -webkit-linear-gradient(90deg, #f7b63f, #faf879);-webkit-text-fill-color: transparent;-webkit-background-clip: text;}.seconds {transform: translateY(16px);background: -webkit-linear-gradient(90deg, #24ff6d, #2f93f1);-webkit-text-fill-color: transparent;-webkit-background-clip: text;}.calender {display: flex;justify-content: center;align-items: center;font-size: 1.3em;font-weight: 500;margin-bottom: 5px;background: -webkit-linear-gradient(90deg, #ae4af6, #ff98d1);-webkit-text-fill-color: transparent;-webkit-background-clip: text;}.day-name,.day-num,.year {margin-left: 8px;}.dot-menu-btn {position: absolute;top: 0;right: 0;margin: 10px;color: #efefef;font-size: 1.5em;cursor: pointer;}.dot-menu {z-index: 999;position: absolute;top: 7px;right: 5px;list-style: none;background: #353e54;padding: 10px 20px;border-radius: 5px;box-shadow: 0 5px 25px rgba(0, 0, 0, 0.5);visibility: hidden;opacity: 0;transition: 0.4s ease;}.dot-menu.active {visibility: visible;opacity: 1;}.menu-item {display: flex;justify-content: center;align-items: center;}.clock-format-text {color: #efefef;font-size: 0.9em;margin-right: 20px;}.format-switch-btn {width: 35px;height: 15px;background: #485470;border-radius: 75px;box-shadow: inset 2px 2px 4px rgba(255, 255, 255, 0.1),inset -2px -2px 4px rgba(0, 0, 0, 0.2);cursor: pointer;display: flex;justify-content: center;align-items: center;}.format-switch-btn:before {content: '';position: absolute;width: 14px;height: 14px;background: #ff5e9a;border-radius: 50%;box-shadow: 0 5px 25px #ff5e9a;transform: translateX(-10px);transition: 0.4s ease;transition-property: background, transform;}.format-switch-btn.active:before {background: #0bff8d;box-shadow: 0 5px 25px #0bff8d;transform: translateX(10px);}
</style><script>//js for switch clock formatconst formatSwitchBtn = document.querySelector(".format-switch-btn");formatSwitchBtn.addEventListener("click", () => {formatSwitchBtn.classList.toggle("active");var formatValue = formatSwitchBtn.getAttribute("date-format");if (formatValue === "12") {formatSwitchBtn.setAttribute("date-format", "24");}else {formatSwitchBtn.setAttribute("date-format", "12");}});//Get Current Time In Javascriptfunction clock() {var today = new Date();var hours = today.getHours();var minutes = today.getMinutes();var seconds = today.getSeconds();let period = "AM";//set the time periodif (hours >= 12) {period = "PM";}//set 12 hour clock formatvar formatValue = formatSwitchBtn.getAttribute("date-format");if (formatValue === "12") {hours = hours > 12 ? hours % 12 : hours;}//add 0 for the value lower than 10if (hours < 10) {hours = "0" + hours;}if (minutes < 10) {minutes = "0" + minutes;}if (seconds < 10) {seconds = "0" + seconds;}document.querySelector(".hours").innerHTML = hours;document.querySelector(".minutes").innerHTML = minutes;document.querySelector(".period").innerHTML = period;document.querySelector(".seconds").innerHTML = seconds;}var updateClock = setInterval(clock, 1000);// get the date in jsvar today = new Date();const dayNum = today.getDate();const year = today.getFullYear();const dayName = today.toLocaleString("default", { weekday: "long" });const monthName = today.toLocaleString("default", { month: "short" });document.querySelector(".month-name").innerHTML = monthName;document.querySelector(".day-name").innerHTML = dayName;document.querySelector(".day-num").innerHTML = dayNum;// document.querySelector(".year").innerHTML = year;//js for dot menu toglleconst dotmenuBtn = document.querySelector(".dot-menu-btn");const dotMenu = document.querySelector(".dot-menu");dotmenuBtn.addEventListener("click", () => {dotMenu.classList.toggle("active");});document.addEventListener("click", (e) => {if (e.target.id !== "active-menu") {dotMenu.classList.remove("active");}});
</script>