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  • 点击屏幕弹出心形效果

    (function(window,document,undefined){
      var hearts = [];
      window.requestAnimationFrame = (function(){
        return window.requestAnimationFrame || window.webkitRequestAnimationFrame ||window.mozRequestAnimationFrame ||window.oRequestAnimationFrame ||window.msRequestAnimationFrame ||

           function (callback){
            setTimeout(callback,1000/60);
           }
        })();
        init();
        function init(){
          css(".heart{ 10px;height: 10px;position: fixed;background: #f00;transform: rotate(45deg);-webkit-transform: rotate(45deg);-moz-transform: rotate(45deg);}.heart:after,.heart:before{content: ''; inherit;height: inherit;background: inherit;border-radius:         50%;-webkit-border-radius: 50%;-moz-border-radius: 50%;position: absolute;}.heart:after{top: -5px;}.heart:before{left: -5px;}");
          attachEvent();
          gameloop();
       }
       function gameloop(){
        for(var i=0;i<hearts.length;i++){
          if(hearts[i].alpha <=0){
            document.body.removeChild(hearts[i].el);
            hearts.splice(i,1);
            continue;
           }
        hearts[i].y--;
        hearts[i].scale += 0.004;
               hearts[i].alpha -= 0.013;
               hearts[i].el.style.cssText = "left:"+hearts[i].x+"px;top:"+hearts[i].y+"px;opacity:"+hearts[i].alpha+";transform:scale("+hearts[i].scale+","+hearts[i].scale+") rotate(45deg);background:"+hearts[i].color;
        }
             requestAnimationFrame(gameloop);
       }
          function attachEvent(){
               var old = typeof window.onclick==="function" && window.onclick;
              window.onclick = function(event){
                   old && old();
               createHeart(event);
             }
       }
       function createHeart(event){
             var d = document.createElement("div");
            d.className = "heart";
           hearts.push({
               el : d,
        x : event.clientX - 5,
        y : event.clientY - 5,
        scale : 1,
        alpha : 1,
        color : randomColor()
             });
       document.body.appendChild(d);
     }
        function css(css){
      var style = document.createElement("style");
      style.type="text/css";
      try{
        style.appendChild(document.createTextNode(css));
      }catch(ex){
        style.styleSheet.cssText = css;
      }
      document.getElementsByTagName('head')[0].appendChild(style);
      }
      function randomColor(){
        return "rgb("+(~~(Math.random()*255))+","+(~~(Math.random()*255))+","+(~~(Math.random()*255))+")";
      }
    })(window,document);

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  • 原文地址:https://www.cnblogs.com/lmxxlm-123/p/8881468.html
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