2022跨年马上跨年了，先用代码给大家写个“跨年倒计时”吧

Posted 2022-01-18 一起学编程

tags:

篇首语：本文由小常识网(cha138.com)小编为大家整理，主要介绍了2022跨年马上跨年了，先用代码给大家写个“跨年倒计时”吧相关的知识，希望对你有一定的参考价值。

马上就要到2022年了，于是用前端语言（html+css+javascript）写了一个跨年倒计时代码，祝大家在新的一年里：所念的人平安喜乐，所想的事顺心如意！

代码：

<!doctype html>

<html>

<head>

<meta charset="utf-8">

<title>新年快乐</title><!-- 这是网页标题 -->

<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> <!--canvas 画布-->

<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 = "red";

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,'2022,01,01');    // 2022年元旦时间 

        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>距离2022年还有：<br>"+day+"天"+hour+"小时"+minute+"分"+second+"秒"+"<br><span>愿我所念的人平安喜乐，<br>愿我所想的事顺心如意。<br>May the people I think of be safe and happy, <br>and may the things I think of be all right.</span>"

        return true;

    

</script>

</body>

</html>

倒计时效果：