*2022年圣诞节到来啦，很高兴这次我们又能一起度过~
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
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转载：https://blog.csdn.net/m0_68539124/article/details/128439848
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