*2022年圣诞节到来啦，很高兴这次我们又能一起度过~
?文章目录
前言效果展示一、夜景烟花绽放动画效果HTML源码 2023年(新年)春节倒计时代码源码 2023除夕倒计时效果展示源码 宇宙星空-效果展示1.源码2.思路3.步骤(js部分) 更多干货?
前言
时光荏苒，白驹过隙。
2022这一年又在忙碌中度过了，过去的一年，我们同努力，我们共欢笑，每一次成功都蕴藏着我们辛勤的劳动。
新的一年即将来到，我们不能停滞不前，一味只是骄傲。愿大家与时俱进，拼搏不懈，共创新的辉煌！
借着新年到来的喜庆，给大家分享一个新年烟花的前端代码，快拿着代码展示给你的朋友们看吧！！
转眼间已经到了2022的尾巴，这一年对于国家来说丰富充实,冬奥会在北京举行、中国共产党第二十次全国代表大会召开、社会共同抗击疫情的第三年、我国完成天宫空间站建造……对于我们每一个个体，2022也承载着我们的快乐与悲伤，它是无法替代的。
新的一年马上就要到了，让我们告别2022，迎接2023！
希望2023,全糖去冰。
效果展示
一、夜景烟花绽放动画效果
HTML源码
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en"><head><meta http-equiv="Content-Type" content="text/html;charset=gb2312"><style>body{margin:0;padding:0;overflow: hidden;}.city{width:100%;position:fixed;bottom: 0px;z-index: 100;}.city img{width: 100%;}</style><title>html5夜景放烟花绽放动画效果</title></head><body onselectstart = "return false"><div style="height:700px;overflow:hidden;"><canvas id='cas' style="background-color:rgba(0,5,24,1);">浏览器不支持canvas</canvas><div class="city"><img src="img/city.png" alt="" /></div><img src="img/moon.png" alt="" id="moon" style="visibility: hidden;"/><div style="display:none"><div class="shape">新年快乐</div><div class="shape">合家幸福</div> <div class="shape">万事如意</div> <div class="shape">心想事成</div> <div class="shape">财源广进</div></div></div><script>var canvas = document.getElementById("cas");var ocas = document.createElement("canvas");var octx = ocas.getContext("2d");var ctx = canvas.getContext("2d");ocas.width = canvas.width = window.innerWidth;ocas.height = canvas.height = 700;var bigbooms = [];window.onload = function(){initAnimate()}function initAnimate(){drawBg();lastTime = new Date();animate();}var lastTime;function animate(){ctx.save();ctx.fillStyle = "rgba(0,5,24,0.1)";ctx.fillRect(0,0,canvas.width,canvas.height);ctx.restore();var newTime = new Date(); if(newTime-lastTime>500+(window.innerHeight-767)/2){var random = Math.random()*100>2?true:false;var x = getRandom(canvas.width/5 , canvas.width*4/5);var y = getRandom(50 , 200);if(random){var bigboom = new Boom(getRandom(canvas.width/3,canvas.width*2/3) ,2,"#FFF" , {x:x , y:y});bigbooms.push(bigboom)}else {var bigboom = new Boom(getRandom(canvas.width/3,canvas.width*2/3) ,2,"#FFF" , {x:canvas.width/2 , y:200} , document.querySelectorAll(".shape")[parseInt(getRandom(0, document.querySelectorAll(".shape").length))]);bigbooms.push(bigboom)}lastTime = newTime;console.log(bigbooms)}stars.foreach(function(){this.paint();})drawMoon();bigbooms.foreach(function(index){var that = this;if(!this.dead){this._move();this._drawLight();}else{this.booms.foreach(function(index){if(!this.dead) {this.moveTo(index);}else if(index === that.booms.length-1){bigbooms[bigbooms.indexOf(that)] = null;}})}});raf(animate);}function drawMoon(){var moon = document.getElementById("moon");var centerX = canvas.width-200 , centerY = 100 , width = 80;if(moon.complete){ctx.drawImage(moon , centerX , centerY , width , width )}else {moon.onload = function(){ctx.drawImage(moon ,centerX , centerY , width , width)}}var index = 0;for(var i=0;i<10;i++){ctx.save();ctx.beginPath();ctx.arc(centerX+width/2 , centerY+width/2 , width/2+index , 0 , 2*Math.PI);ctx.fillStyle="rgba(240,219,120,0.005)";index+=2;ctx.fill();ctx.restore();}}Array.prototype.foreach = function(callback){for(var i=0;i<this.length;i++){if(this[i]!==null) callback.apply(this[i] , [i])}}var raf = window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame || window.oRequestAnimationFrame || window.msRequestAnimationFrame || function (callback) { window.setTimeout(callback, 1000 / 60); }; canvas.onclick = function(){var x = event.clientX;var y = event.clientY;var bigboom = new Boom(getRandom(canvas.width/3,canvas.width*2/3) ,2,"#FFF" , {x:x , y:y});bigbooms.push(bigboom)}// canvas.addEventLisener("touchstart" , function(event){// var touch = event.targetTouches[0];// var x = event.pageX;// var y = event.pageY;// var bigboom = new Boom(getRandom(canvas.width/3,canvas.width*2/3) ,2,"#FFF" , {x:x , y:y});// bigbooms.push(bigboom)// })var Boom = function(x,r,c,boomArea,shape){this.booms = [];this.x = x;this.y = (canvas.height+r);this.r = r;this.c = c;this.shape = shape || false;this.boomArea = boomArea;this.theta = 0;this.dead = false;this.ba = parseInt(getRandom(80 , 200));}Boom.prototype = {_paint:function(){ctx.save();ctx.beginPath();ctx.arc(this.x,this.y,this.r,0,2*Math.PI);ctx.fillStyle = this.c;ctx.fill();ctx.restore();},_move:function(){var dx = this.boomArea.x - this.x , dy = this.boomArea.y - this.y;this.x = this.x+dx*0.01;this.y = this.y+dy*0.01;if(Math.abs(dx)<=this.ba && Math.abs(dy)<=this.ba){if(this.shape){this._shapBoom();}else this._boom();this.dead = true;}else {this._paint();}},_drawLight:function(){ctx.save();ctx.fillStyle = "rgba(255,228,150,0.3)";ctx.beginPath();ctx.arc(this.x , this.y , this.r+3*Math.random()+1 , 0 , 2*Math.PI);ctx.fill();ctx.restore();},_boom:function(){var fragNum = getRandom(30 , 200);var style = getRandom(0,10)>=5? 1 : 2;var color;if(style===1){color = {a:parseInt(getRandom(128,255)),b:parseInt(getRandom(128,255)),c:parseInt(getRandom(128,255))}}var fanwei = parseInt(getRandom(300, 400));for(var i=0;i<fragNum;i++){if(style===2){color = {a:parseInt(getRandom(128,255)),b:parseInt(getRandom(128,255)),c:parseInt(getRandom(128,255))}}var a = getRandom(-Math.PI, Math.PI);var x = getRandom(0, fanwei) * Math.cos(a) + this.x;var y = getRandom(0, fanwei) * Math.sin(a) + this.y; var radius = getRandom(0 , 2)var frag = new Frag(this.x , this.y , radius , color , x , y );this.booms.push(frag);}},_shapBoom:function(){var that = this;putValue(ocas , octx , this.shape , 5, function(dots){var dx = canvas.width/2-that.x;var dy = canvas.height/2-that.y;for(var i=0;i<dots.length;i++){color = {a:dots[i].a,b:dots[i].b,c:dots[i].c}var x = dots[i].x;var y = dots[i].y;var radius = 1;var frag = new Frag(that.x , that.y , radius , color , x-dx , y-dy);that.booms.push(frag);}})}}function putValue(canvas , context , ele , dr , callback){context.clearRect(0,0,canvas.width,canvas.height);var img = new Image();if(ele.innerHTML.indexOf("img")>=0){img.src = ele.getElementsByTagName("img")[0].src;imgload(img , function(){context.drawImage(img , canvas.width/2 - img.width/2 , canvas.height/2 - img.width/2);dots = getimgData(canvas , context , dr);callback(dots);})}else {var text = ele.innerHTML;context.save();var fontSize =200;context.font = fontSize+"px 宋体 bold";context.textAlign = "center";context.textBaseline = "middle";context.fillStyle = "rgba("+parseInt(getRandom(128,255))+","+parseInt(getRandom(128,255))+","+parseInt(getRandom(128,255))+" , 1)";context.fillText(text , canvas.width/2 , canvas.height/2);context.restore();dots = getimgData(canvas , context , dr);callback(dots);}}function imgload(img , callback){if(img.complete){callback.call(img);}else {img.onload = function(){callback.call(this);}}}function getimgData(canvas , context , dr){var imgData = context.getImageData(0,0,canvas.width , canvas.height);context.clearRect(0,0,canvas.width , canvas.height);var dots = [];for(var x=0;x<imgData.width;x+=dr){for(var y=0;y<imgData.height;y+=dr){var i = (y*imgData.width + x)*4;if(imgData.data[i+3] > 128){var dot = {x:x , y:y , a:imgData.data[i] , b:imgData.data[i+1] , c:imgData.data[i+2]};dots.push(dot);}}}return dots;}function getRandom(a , b){return Math.random()*(b-a)+a;}var maxRadius = 1 , stars=[];function drawBg(){for(var i=0;i<100;i++){var r = Math.random()*maxRadius;var x = Math.random()*canvas.width;var y = Math.random()*2*canvas.height - canvas.height;var star = new Star(x , y , r);stars.push(star);star.paint()}}var Star = function(x,y,r){this.x = x;this.y=y;this.r=r;}Star.prototype = {paint:function(){ctx.save();ctx.beginPath();ctx.arc(this.x , this.y , this.r , 0 , 2*Math.PI);ctx.fillStyle = "rgba(255,255,255,"+this.r+")";ctx.fill();ctx.restore();}}var focallength = 250;var Frag = function(centerX , centerY , radius , color ,tx , ty){this.tx = tx;this.ty = ty;this.x = centerX;this.y = centerY;this.dead = false;this.centerX = centerX;this.centerY = centerY;this.radius = radius;this.color = color;}Frag.prototype = {paint:function(){ctx.save();ctx.beginPath();ctx.arc(this.x , this.y , this.radius , 0 , 2*Math.PI);ctx.fillStyle = "rgba("+this.color.a+","+this.color.b+","+this.color.c+",1)";ctx.fill()ctx.restore();},moveTo:function(index){this.ty = this.ty+0.3;var dx = this.tx - this.x , dy = this.ty - this.y;this.x = Math.abs(dx)<0.1 ? this.tx : (this.x+dx*0.1);this.y = Math.abs(dy)<0.1 ? this.ty : (this.y+dy*0.1);if(dx===0 && Math.abs(dy)<=80){this.dead = true;}this.paint();}}</script></body></html>再新建文件夹img把以下两张图片放进去
city.png
moon.png
2023年(新年)春节倒计时代码
2023年新年倒计时HTML源代码，2023年春节倒计时代码，直接运行index.html即可。
源码
NewYear.css
/*初始化*/* { padding: 0; margin: 0 auto;}/*背景色*/body,html { background: url(./img/newyear.png) no-repeat; background-size: 100% 100%; background-attachment: fixed; /* background-color: black; */}/*父盒子*/.fa { color:#6c5ce7; margin-top: 200px; background-color: rgba(0, 17, 17, 0.5); /*边框圆角*/ border-radius: 80px; /*伸缩布局*/ display: flex; /*改变主轴方向 竖排*/ flex-direction: column;}.fir { margin-left: 620px; margin-bottom: 100px; font-size: 80px;}.fa .sj { /*伸缩布局*/ display: flex; /*改变主轴方向*/ flex-direction: column;}.fa .sj div { width: 100%; /*伸缩布局*/ display: flex; /*主轴排列方式*/ justify-content: center; color: black; margin-bottom: 60px; /*多行侧轴排列方式*/ align-content: space-around; color:#ff7675; font-size: 55px;}.fa .sj .zi { color:#d63031;}index.html
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>新年倒计时</title> <link rel="stylesheet" href="NewYear.css"> <script src="NewYear.js"></script></head><body> <div class="fa"> <span class="fir">距离2023春节(1-22)还有</span> <div class="sj"> <div><span></span><span class="zi">天</span></div> <div><span></span><span class="zi">时</span></div> <div><span></span><span class="zi">分</span></div> <div><span></span><span class="zi">秒</span></div> </div> </div></body></html>2023除夕倒计时
效果展示
源码
<!doctype html><html><head><meta charset="utf-8"><title>新年快乐</title><style>body{ overflow: hidden; margin: 0;}h1{ position: fixed; top: 30%; left: 0; width: 100%; text-align: center; transform:translateY(-50%); font-family: 'Love Ya Like A Sister', cursive; font-size: 60px; color: #c70012; padding: 0 20px;}h1 span{ position: fixed; left: 0; width: 100%; text-align: center; margin-top:30px; font-size:40px;}</style> </head><body><h1 id="h1"></h1><canvas></canvas> <script>var canvas = document.querySelector("canvas"), ctx = canvas.getContext("2d"); var ww,wh; function onResize(){ ww = canvas.width = window.innerWidth; wh = canvas.height = window.innerHeight;} ctx.strokeStyle = "pink";ctx.shadowBlur = 25;ctx.shadowColor = "hsla(0, 100%, 60%,0.5)"; var precision = 100;var hearts = [];var mouseMoved = false;function onMove(e){ mouseMoved = true; if(e.type === "touchmove"){ hearts.push(new Heart(e.touches[0].clientX, e.touches[0].clientY)); hearts.push(new Heart(e.touches[0].clientX, e.touches[0].clientY)); } else{ hearts.push(new Heart(e.clientX, e.clientY)); hearts.push(new Heart(e.clientX, e.clientY)); }} var Heart = function(x,y){ this.x = x || Math.random()*ww; this.y = y || Math.random()*wh; this.size = Math.random()*2 + 1; this.shadowBlur = Math.random() * 10; this.speedX = (Math.random()+0.2-0.6) * 8; this.speedY = (Math.random()+0.2-0.6) * 8; this.speedSize = Math.random()*0.05 + 0.01; this.opacity = 1; this.vertices = []; for (var i = 0; i < precision; i++) { var step = (i / precision - 0.5) * (Math.PI * 2); var vector = { x : (15 * Math.pow(Math.sin(step), 3)), y : -(13 * Math.cos(step) - 5 * Math.cos(2 * step) - 2 * Math.cos(3 * step) - Math.cos(4 * step)) } this.vertices.push(vector); }} Heart.prototype.draw = function(){ this.size -= this.speedSize; this.x += this.speedX; this.y += this.speedY; ctx.save(); ctx.translate(-1000,this.y); ctx.scale(this.size, this.size); ctx.beginPath(); for (var i = 0; i < precision; i++) { var vector = this.vertices[i]; ctx.lineTo(vector.x, vector.y); } ctx.globalAlpha = this.size; ctx.shadowBlur = Math.round((3 - this.size) * 10); ctx.shadowColor = "hsla(0, 100%, 60%,0.5)"; ctx.shadowOffsetX = this.x + 1000; ctx.globalCompositeOperation = "screen" ctx.closePath(); ctx.fill() ctx.restore();}; function render(a){ requestAnimationFrame(render); hearts.push(new Heart()) ctx.clearRect(0,0,ww,wh); for (var i = 0; i < hearts.length; i++) { hearts[i].draw(); if(hearts[i].size <= 0){ hearts.splice(i,1); i--; } }} onResize();window.addEventListener("mousemove", onMove);window.addEventListener("touchmove", onMove);window.addEventListener("resize", onResize);requestAnimationFrame(render); window.onload=function starttime(){ time(h1,'2023/1/21'); // 2023年春节时间 ptimer = setTimeout(starttime,1000); // 添加计时器} function time(obj,futimg){ var nowtime = new Date().getTime(); // 现在时间转换为时间戳 var futruetime = new Date(futimg).getTime(); // 未来时间转换为时间戳 var msec = futruetime-nowtime; // 毫秒 未来时间-现在时间 var time = (msec/1000); // 毫秒/1000 var day = parseInt(time/86400); // 天 24*60*60*1000 var hour = parseInt(time/3600)-24*day; // 小时 60*60 总小时数-过去的小时数=现在的小时数 var minute = parseInt(time%3600/60); // 分 -(day*24) 以60秒为一整份 取余 剩下秒数 秒数/60 就是分钟数 var second = parseInt(time%60); // 以60秒为一整份 取余 剩下秒数 obj.innerHTML="<br>2023年<br>除夕倒计时：<br>"+day+"天"+hour+"小时"+minute+"分"+second+"秒"+"<br><span>善良 勇敢 优秀 决不妥协<br>祝你也祝我<br>" return true; }</script> <audio id="bgmusic" src="http://music.163.com/song/media/outer/url?id=1851244378.mp3" autoplay="autoplay" loop="loop" style="display: block; width: 3%; height:3%;"></audio> <script type="text/javascript"> document.addEventListener('DOMContentLoaded', function () { function audioAutoPlay() { var audio = document.getElementById('bgmusic'); audio.play(); document.addEventListener("WeixinJSBridgeReady", function () { audio.play(); }, false); } audioAutoPlay(); });</script></body></html>宇宙星空-效果展示
距离2023.1.1还有27天（天数我是乱写的，并不是按照文章发布时间来写的，大家可以自己修改源码）
1.源码
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Document</title> <script> var count = document.getElementsByClassName('main'); var times0 = document.getElementsByClassName('time'); var inputtime = +new Date("2023/01/01 00:00:00"); console.log(inputtime); var timer = null; clearInterval(timer) timer = setInterval(countdown,1000) function countdown(){ var nowtime = +new Date(); var times = parseInt((inputtime - nowtime ) / 1000); if(times >= 0){ var d = parseInt(times/60/60/24); d = d < 10 ? '0' + d : d ; var h = parseInt(times/60 /60%24); h = h < 10 ? '0' + h : h ; var m = parseInt(times/60%60); m = m < 10 ? '0' + m : m ; var s = parseInt(times%60); s = s < 10 ? '0' + s : s ; times0[0].innerHTML = d; times0[1].innerHTML = h; times0[2].innerHTML = m; times0[3].innerHTML = s; }else{ clearInterval(timer) } } </script> <style> *{ margin: 0%; padding: 0%; } body{ height: 100vh; width: 100%; display: flex; align-items: center; justify-content: center; } .block{ display: inline-block; margin-left: 50px; } .block p{ font-size: 40px; color: aliceblue; font-weight: bolder; text-align: center; } .block a{ font-size: 20px; color: aliceblue; } #nyc{ color: aliceblue; font-size: 50px; } </style></head> <body background="图片\10523Q492-0.jpg"> <div class="main"> <p id="nyc"> New Year Countdown</p> <br> <div class="block"> <p class="time">00</p> <a>days</a> </div> <div class="block"> <p class="time">00</p> <a>hours</a> </div> <div class="block"> <p class="time">00</p> <a>minutes</a> </div> <div class="block"> <p class="time">00</p> <a>seconds</a> </div> </div> </body> </html>2.思路
创建一个计时器函数, 计算出当前时间和目标时间的距离.
利用"setInterval"方法不断调用计时器函数,达到数字变换, 也就是倒计时的效果.
3.步骤(js部分)
var count = document.getElementsByClassName('main'); var times0 = document.getElementsByClassName('time'); var inputtime = +new Date("2023/01/01 00:00:00"); var nowtime = +new Date(); console.log(inputtime); var timer = null; clearInterval(timer) timer = setInterval(countdown,1000)A."var"定义变量
利用"document.getElementsByClassName()"方法提取中已经创建的元素作为js对象.
类似的方法有:
B. 获取时间
"+new Date()"方法可以获取当前时间距离"1970年1月1日0时0分0秒’的毫秒数, 利用这点可以获取当前时间.
括号中若添加具体日期(写法: 年/月/日 时:分:秒 ), 则可以获取具体日期距离"1970年1月1日0时0分0秒’的毫秒数, 利用这点可以获取目标时间.
function countdown(){ var times = parseInt((inputtime - nowtime ) / 1000); if(times >= 0){ var d = parseInt(times/60/60/24); d = d < 10 ? '0' + d : d ; var h = parseInt(times/60 /60%24); h = h < 10 ? '0' + h : h ; var m = parseInt(times/60%60); m = m < 10 ? '0' + m : m ; var s = parseInt(times%60); s = s < 10 ? '0' + s : s ; times0[0].innerHTML = d; times0[1].innerHTML = h; times0[2].innerHTML = m; times0[3].innerHTML = s; }else{ clearInterval(timer) } }C.创建计时器函数
计算时间的距离:
(目标时间-当前时间)/1000=时间距离
var times = parseInt((inputtime - nowtime ) / 1000);时间距离转换成 天数,时数,分数,秒数:
并做一个简单判断:
如果计算出来的数字小于10, 则在数字面前添加一个0一保持美观和谐.
var d = parseInt(times/60/60/24); d = d < 10 ? '0' + d : d ; var h = parseInt(times/60 /60%24); h = h < 10 ? '0' + h : h ; var m = parseInt(times/60%60); m = m < 10 ? '0' + m : m ; var s = parseInt(times%60); s = s < 10 ? '0' + s : s ;将计算所得数字添加到页面中:
利用到了 "innerhtml"方法, 主要用于改变中已经定义的元素.
最后做一个总的判断:
如果时间距离大于零, 则做计算, 展现倒计时效果.
如果距离等于零, 则对函数的反复调用停止, 计时终止
if(times >= 0){ }else{ clearInterval(timer) }D.反复调用计时器函数
var timer = null; clearInterval(timer) timer = setInterval(countdown,1000) var timer = null; clearInterval(timer) timer = setInterval(countdown,1000)"setInterval()"方法中有两个参数:
第一个: 将要调用的函数名;
第二个: 调用的间隔时间, 单位为一毫秒, 自然, “1000"即代表"1秒钟调用一次”
"clearInterval(timer)"指在调用之前将调用器归零
更多干货?
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