JavaScript实现动态计时器/源码

来源：互联网发布：如何根据数据拟合曲线编辑：程序博客网时间：2024/06/06 00:17
纯CSS/JavaScript表白计时器

<!doctype html><html><head><meta charset="utf-8"><link href="favicon.ico" rel="shortcut icon" /><title>微光</title><style>body{  overflow: hidden;  margin: 0;  background-image: url('https://i.loli.net/2017/10/25/59efde9fb7285.jpg" alt="006u0ogFly1fj5mmk8lw7j30zf0qogo6.jpg" title="006u0ogFly1fj5mmk8lw7j30zf0qogo6.jpg');}h1{  position: fixed;  top: 50%;  left: 0;  width: 100%;  text-align: center;  transform:translateY(-50%);  font-family: 'Love Ya Like A Sister', cursive;  font-size: 40px;  color: #c70012;  padding: 0 20px;}h1 span{    font-size:20px;}</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,'2013,6,29');    // 开始时间        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 = nowtime-futruetime; // 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//              console.log(hour+":"+minute+":"+second)//              alert(hour)        obj.innerHTML="华晨宇<br>认识你已经：<br>"+day+"天"+hour+"小时"+minute+"分"+second+"秒"+"了<br><span>一时间不知道从哪说起,真爱来了，我们要好好把握。<br>不管面临多大的压力,不管前面的路如何崎岖.<br>不管经历过什么,我仍坚信最浪漫的事就是和你一起慢慢变老.<br>相信中间的计时器,将永远继续下去,直至数据溢出.</span>"        return true;    }</script></body></html>
效果图

这里写图片描述
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