如何用JavaScript制作一个炫酷的倒计时动画效果？
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本文共计601个文字，预计阅读时间需要3分钟。
原文示例代码为：javascript// 倒计时动画实现let countDown={ init: function(target, endTime) { this.target=target; this.endTime=endTime; this.countDown(); }, countDown: function() { let now=new Date().getTime(); let remainTime=this.endTime - now; if (remainTime > 0) { let hours=Math.floor((remainTime % (1000 * 60 * 60 * 24)) / (1000 * 60 * 60)); let minutes=Math.floor((remainTime % (1000 * 60 * 60)) / (1000 * 60)); let seconds=Math.floor((remainTime % (1000 * 60)) / 1000); this.target.textContent=`${hours}小时${minutes}分钟${seconds}秒`; setTimeout(this.countDown.bind(this), 1000); } else { this.target.textContent='时间到！'; } }};
// 使用示例let endTime=new Date('2022-12-31T23:59:59').getTime();countDown.init(document.getElementById('countDown'), endTime);
改写后内容：javascript// 简易倒计时实现let countdown={ start: function(element, finalTime) { this.element=element; this.finalTime=finalTime; this.update(); }, update: function() { let currentTime=new Date().getTime(); let remaining=this.finalTime - currentTime; if (remaining > 0) { let hours=Math.floor(remaining / (1000 * 60 * 60)); let minutes=Math.floor((remaining % (1000 * 60 * 60)) / (1000 * 60)); let seconds=Math.floor((remaining % (1000 * 60)) / 1000); this.element.innerText=`${hours}时${minutes}分${seconds}秒`; setTimeout(this.update.bind(this), 1000); } else { this.element.innerText='倒计时结束'; } }};
// 应用示例let endTime=new Date('Dec 31, 2022 23:59:59').getTime();countdown.start(document.getElementById('countdown'), endTime);
本文实例为大家分享了js实现酷炫倒计时动画的具体代码，供大家参考，具体内容如下
前段时间和朋友去音乐餐厅吃饭，中间有个活动，然后看到他们软件公众号H5有个活动开始的倒计时的动画效果，于是想了下实现思路。
<!DOCTYPE html> <html> <head> <meta charset="utf-8" /> <title>js实现酷炫倒计时动画效果</title> <style> *{margin:0;padding:0;} body{width:100%;height:100%;overflow:hidden;} .box{width:1000px;height:700px;margin:100px auto;} .btn{width:100px;height:100px;margin:50px auto 0;font-size:16px;color:#fff;text-align:center;line-height:100px;border-radius:100px;background:#3385ff;} .btn:hover{box-shadow: 0 0 10px #77aeff;cursor:pointer;} h1{font-size:300px;color:red;text-align:center;} h1.active{animation:count .5s;} @keyframes count { from { transform: scale(.1); opacity: 1; } to { transform: scale(3.5); opacity: 0; display:none; } } </style> </head> <body> <div class="btn">倒计时</div> <div class="box"> <h1 style="display:none;">10</h1> </div> </body> <script> let NUMBER = 1; let COUNT = 10; let COLORS = ['#8c00ff', '#006bff', '#4fff00', '#ffb800', '#ff0000']; let timer = null; function $(str) { return document.querySelector(str); } function actionNum () { let h1 = $('h1'); $('h1').style.display = 'block'; timer = setInterval(() => { COUNT--; NUMBER++; if (COUNT >= 0) { h1.classList.remove('active'); setTimeout(() => { let num = Math.floor(Math.random()*5); h1.innerText = COUNT; h1.style.color = COLORS[num]; h1.classList.add('active'); }, 100); } else { clearInterval(timer); } }, 1000); } $('.btn').onclick = function () { if (COUNT < 0) { COUNT = 11; } actionNum(); }; </script> </html>
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持自由互联。
本文共计601个文字，预计阅读时间需要3分钟。
原文示例代码为：javascript// 倒计时动画实现let countDown={ init: function(target, endTime) { this.target=target; this.endTime=endTime; this.countDown(); }, countDown: function() { let now=new Date().getTime(); let remainTime=this.endTime - now; if (remainTime > 0) { let hours=Math.floor((remainTime % (1000 * 60 * 60 * 24)) / (1000 * 60 * 60)); let minutes=Math.floor((remainTime % (1000 * 60 * 60)) / (1000 * 60)); let seconds=Math.floor((remainTime % (1000 * 60)) / 1000); this.target.textContent=`${hours}小时${minutes}分钟${seconds}秒`; setTimeout(this.countDown.bind(this), 1000); } else { this.target.textContent='时间到！'; } }};
// 使用示例let endTime=new Date('2022-12-31T23:59:59').getTime();countDown.init(document.getElementById('countDown'), endTime);
改写后内容：javascript// 简易倒计时实现let countdown={ start: function(element, finalTime) { this.element=element; this.finalTime=finalTime; this.update(); }, update: function() { let currentTime=new Date().getTime(); let remaining=this.finalTime - currentTime; if (remaining > 0) { let hours=Math.floor(remaining / (1000 * 60 * 60)); let minutes=Math.floor((remaining % (1000 * 60 * 60)) / (1000 * 60)); let seconds=Math.floor((remaining % (1000 * 60)) / 1000); this.element.innerText=`${hours}时${minutes}分${seconds}秒`; setTimeout(this.update.bind(this), 1000); } else { this.element.innerText='倒计时结束'; } }};
// 应用示例let endTime=new Date('Dec 31, 2022 23:59:59').getTime();countdown.start(document.getElementById('countdown'), endTime);
本文实例为大家分享了js实现酷炫倒计时动画的具体代码，供大家参考，具体内容如下
前段时间和朋友去音乐餐厅吃饭，中间有个活动，然后看到他们软件公众号H5有个活动开始的倒计时的动画效果，于是想了下实现思路。
<!DOCTYPE html> <html> <head> <meta charset="utf-8" /> <title>js实现酷炫倒计时动画效果</title> <style> *{margin:0;padding:0;} body{width:100%;height:100%;overflow:hidden;} .box{width:1000px;height:700px;margin:100px auto;} .btn{width:100px;height:100px;margin:50px auto 0;font-size:16px;color:#fff;text-align:center;line-height:100px;border-radius:100px;background:#3385ff;} .btn:hover{box-shadow: 0 0 10px #77aeff;cursor:pointer;} h1{font-size:300px;color:red;text-align:center;} h1.active{animation:count .5s;} @keyframes count { from { transform: scale(.1); opacity: 1; } to { transform: scale(3.5); opacity: 0; display:none; } } </style> </head> <body> <div class="btn">倒计时</div> <div class="box"> <h1 style="display:none;">10</h1> </div> </body> <script> let NUMBER = 1; let COUNT = 10; let COLORS = ['#8c00ff', '#006bff', '#4fff00', '#ffb800', '#ff0000']; let timer = null; function $(str) { return document.querySelector(str); } function actionNum () { let h1 = $('h1'); $('h1').style.display = 'block'; timer = setInterval(() => { COUNT--; NUMBER++; if (COUNT >= 0) { h1.classList.remove('active'); setTimeout(() => { let num = Math.floor(Math.random()*5); h1.innerText = COUNT; h1.style.color = COLORS[num]; h1.classList.add('active'); }, 100); } else { clearInterval(timer); } }, 1000); } $('.btn').onclick = function () { if (COUNT < 0) { COUNT = 11; } actionNum(); }; </script> </html>
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持自由互联。