520精美网页

蹭个520的热度，可以做个适合自己的表白网页噢。附上代码：

<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 = "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,'2017/3/15');                           // 在一起的时间
        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="亲爱的<br>咱俩在一起的时间已经：<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>

这个图想必很多人都看过了，经典的黑客帝国的图片。核心代码如下：

<script>

  var cav = document.getElementById('content');

  var w = window.screen.width;

  var h = window.screen.height;

  var yPositions = Array(300).join(0).split('');

  var ctx = cav.getContext('2d');

  var draw = function(){

    ctx.fillStyle = 'rgba(0,0,0,.05)';

    ctx.fillRect(0,0,w,h);

    ctx.fillStyle = 'green';

    ctx.font = '20px';

 

    yPositions.map(function(y,index){

      text = String.fromCharCode(1e2+Math.random()*330);

      x = index*10;

      cav.getContext('2d').fillText(text,x,y);

      if(y>Math.random()*1e4){

        yPositions[index]=0;

      }else{

        yPositions[index]=y+10;

      }

    });

 

  }

  setInterval('draw()',30);
</script>

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