#yyds干货盘点# Html+Css+js实现春节倒计时效果（移动端和PC端）-阿里云开发者社区

#yyds干货盘点# Html+Css+js实现春节倒计时效果（移动端和PC端）

2022-04-29 178

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简介： #yyds干货盘点# Html+Css+js实现春节倒计时效果（移动端和PC端）

前言

我是歌谣我有个兄弟巅峰的时候排名c站总榜19 叫前端小歌谣曾经我花了三年的时间创作了他现在我要用五年的时间超越他今天又是接近兄弟的一天人生难免坎坷大不了从头再来歌谣的意志是永恒的放弃很容易但是坚持一定很酷

导语

歌谣歌谣新的一年就要到了可否写一个春节的倒计时呢我想看看哪天可以过春节

效果预览

html部分

<!DOCTYPE html>
<!--geyao-->
  <head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <link rel="stylesheet" href="css/style.css">
    <link rel="stylesheet" href="css/mobile.css">
    <title>春节倒计时</title>
  </head>
  <body>
    <div class="container">
      <h2><span id="title">春节倒计时</span>2022</h2>
      <div class="countdown">
        <div id="day">--</div>
        <div id="hour">--</div>
        <div id="minute">--</div>
        <div id="second">--</div>
      </div>
      <!-- 手动切换不好看 直接加定时器切换 微信公众号关注前端小歌谣
       -->
      <!-- <div id="btn">切换背景</div> -->
    </div>
      <script  src="js/script.js"></script>
  </body>
</html>

移动端样式（mobile.css）

@media screen and (max-width: 1025px) {
  * {
    margin: 0;
    padding: 0;
  }
  body {
    background: rgb(129, 155, 190) url(../image/geyao1.jpg);
    background-size: cover;
    background-position: center center;
    height: 100%;
  }
  .container {
    margin: 0;
    color: #fff;
    line-height: normal;
    position: absolute;
    align-items: center;
    left: 5%;
    right: 5%;
  }
  .container h2 {
    font-size: 6em;
    text-align: center;
    margin: 10% 0;
    color: #fff;
  }
  .container h2 span {
    color: #fff;
    display: block;
    text-align: center;
    font-size: 0.3em;
    font-weight: 300;
    letter-spacing: 2px;
  }
  .countdown {
    display: flex;
    justify-content: space-around;
    margin: 0;
  }
  .countdown div {
    width: 20%;
    height: 13vw;
    margin: 0 10px;
    line-height: 13vw;
    font-size: 2em;
    position: relative;
    text-align: center;
    background: #333333;
    color: #ffffff;
    font-weight: 500;
    border-radius: 10px 10px 0 0;
  }
  .countdown div:before {
    content: '';
    position: absolute;
    bottom: -30px;
    left: 0;
    width: 100%;
    height: 30px;
    background: #b00000;
    color: #ffffff;
    font-size: 0.4em;
    line-height: 35px;
    font-weight: 300;
    border-radius: 0 0 10px 10px;
  }
  .countdown #day:before {
    content: '天';
  }
  .countdown #hour:before {
    content: '时';
  }
  .countdown #minute:before {
    content: '分';
  }
  .countdown #second:before {
    content: '秒';
  }
}

pc端样式（style.css）

* {
  margin: 0;
  padding: 0;
  font-family: 'Poppins', sans-serif;
}
@media screen and (min-width: 1025px) {
  body {
    background: rgb(129, 155, 190) url(../image/geyao1.jpg);
    background-attachment: fixed;
    background-size: cover;
    -webkit-background-size: cover;
    -o-background-size: cover;
  }
  .container {
    position: absolute;
    top: 80px;
    left: 100px;
    right: 100px;
    bottom: 80px;
    background-size: cover;
    -webkit-background-size: cover;
    -o-background-size: cover;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    box-shadow: 0 50px 50px rgba(0, 0, 0, 0.8),
      0 0 0 100px rgba(0, 0, 0, 0.3);
  }
  .container h2 {
    text-align: center;
    font-size: 10em;
    line-height: 0.7em;
    color: #ffffff;
    margin-top: -80px;
  }
  .container h2 span {
    display: block;
    font-weight: 300;
    letter-spacing: 6px;
    font-size: 0.2em;
  }
  .countdown {
    display: flex;
    margin-top: 50px;
  }
  .countdown div {
    position: relative;
    width: 100px;
    height: 100px;
    line-height: 100px;
    text-align: center;
    background: #333;
    color: #fff;
    margin: 0 15px;
    font-size: 3em;
    font-weight: 500;
    border-radius: 10px 10px 0 0;
  }
  .countdown div:before {
    content: '';
    position: absolute;
    bottom: -30px;
    left: 0;
    width: 100%;
    height: 35px;
    background: #b00000;
    color: #ffffff;
    font-size: 0.35em;
    line-height: 35px;
    font-weight: 300;
    border-radius: 0 0 10px 10px;
  }
  .countdown #day:before {
    content: '天';
  }
  .countdown #hour:before {
    content: '时';
  }
  .countdown #minute:before {
    content: '分';
  }
  .countdown #second:before {
    content: '秒';
  }
}
canvas {
  width: 100%;
  height: 100%;
}
::-webkit-scrollbar {
  display: none;
}
#btn{
  margin: 40px;
  width: 100px;
  height: 30px;
  background: pink;
  text-align: center;
  color: darkred;
  line-height: 30px;
}

js部分

class Snowflake {
  constructor() {
    this.x = 0;
    this.y = 0;
    this.vx = 0;
    this.vy = 0;
    this.radius = 0;
    this.alpha = 0;
    this.reset();
  }
  reset() {
    this.x = this.randBetween(0, window.innerWidth);
    this.y = this.randBetween(0, -window.innerHeight);
    this.vx = this.randBetween(-3, 3);
    this.vy = this.randBetween(2, 5);
    this.radius = this.randBetween(1, 4);
    this.alpha = this.randBetween(0.1, 0.9);
  }
  randBetween(min, max) {
    return min + Math.random() * (max - min);
  }
  update() {
    this.x += this.vx;
    this.y += this.vy;
    if (this.y + this.radius > window.innerHeight) {
      this.reset();
    }
  }
}
class Snow {
  constructor() {
    this.canvas = document.createElement('canvas');
    this.ctx = this.canvas.getContext('2d');
    document.body.appendChild(this.canvas);
    window.addEventListener('resize', () => this.onResize());
    this.onResize();
    this.updateBound = this.update.bind(this);
    requestAnimationFrame(this.updateBound);
    this.createSnowflakes();
  }
  onResize() {
    this.width = window.innerWidth;
    this.height = window.innerHeight;
    this.canvas.width = this.width;
    this.canvas.height = this.height;
  }
  createSnowflakes() {
    const flakes = window.innerWidth / 4;
    this.snowflakes = [];
    for (let s = 0; s < flakes; s++) {
      this.snowflakes.push(new Snowflake());
    }
  }
  update() {
    this.ctx.clearRect(0, 0, this.width, this.height);
    for (let flake of this.snowflakes) {
      flake.update();
      this.ctx.save();
      this.ctx.fillStyle = '#FFF';
      this.ctx.beginPath();
      this.ctx.arc(flake.x, flake.y, flake.radius, 0, Math.PI * 2);
      this.ctx.closePath();
      this.ctx.globalAlpha = flake.alpha;
      this.ctx.fill();
      this.ctx.restore();
    }
    requestAnimationFrame(this.updateBound);
  }
}
new Snow();
var stop = false;
function show_runtime() {
  var newDay = '2022/2/1 00:00:00';
  var countDate = new Date(newDay);
  var now = new Date().getTime();
  gap = countDate - now;
  var second = 1000;
  var minute = second * 60;
  var hour = minute * 60;
  var day = hour * 24;
  var d = Math.floor(gap / day);
  var h = Math.floor((gap % day) / hour);
  var m = Math.floor((gap % hour) / minute);
  var s = Math.floor((gap % minute) / second);
  if ((d, h, m, s < 0)) {
    stop = true;
  } else {
    document.getElementById('day').innerText = d;
    document.getElementById('hour').innerText = h;
    document.getElementById('minute').innerText = m;
    document.getElementById('second').innerText = s;
  }
}
function newyear() {
  document.getElementById('title').innerText = 'Happy Spring Festival';
  document.getElementById('day').innerText = '春';
  document.getElementById('hour').innerText = '节';
  document.getElementById('minute').innerText = '快';
  document.getElementById('second').innerText = '乐';
}
var time = setInterval(() => {
  show_runtime();
  if (stop === true) {
    newyear();
    clearInterval(time);
  }
}, 1000);
// 定时器 控制图片自动切换
function downTime() {
  let item = 1;
  setInterval(() => {
    item++;
    if (item === 4) {
      item = 1;
    }
    console.log(item, 'item');
    document.body.style.backgroundImage = `url(./image/geyao${item}.jpg)`;
    return item;
    e.stopPropagation(); //取消事件冒泡
  }, 2000);
}
window.onload = downTime;