CSS3页面加载Loading动画

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以下是 CSS3页面加载Loading动画的示例演示效果:

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部分效果截图:

HTML代码(index.html):

<!DOCTYPE html>
<html>

<head>
  <meta charset="UTF-8">
  <title>CSS3页面加载Loading动画演示</title>
	<style>
@keyframes left {
  0% {
    background: blue;
    transform: rotateX(90deg);
  }

  50% {
    background: white;
    transform: translate(200px, 0px) rotateX(0deg);
  }

  100% {
    background: red;
    transform: translate(0px, 0px) rotateX(90deg) scale(1.8);
    opacity: .1;
  }
}
@keyframes right {
  0% {
    background: red;
    transform: rotateX(90deg);
  }

  50% {
    background: white;
    transform: translate(-200px, 0px) rotateX(0deg);
  }

  100% {
    background: blue;
    transform: translate(0px, 0px) rotateX(90deg) scale(1.8);
    opacity: .1;
  }
}
body {
  background: black;
}

.square {
  opacity: .6;
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
  width: 40px;
  height: 40px;
  margin: auto;
  background: black;
}
.square:nth-child(1) {
  animation: left 6s infinite;
}
.square:nth-child(2) {
  animation: left 6s .2s infinite;
}
.square:nth-child(3) {
  animation: left 6s .4s infinite;
}
.square:nth-child(4) {
  animation: left 6s .6s infinite;
}
.square:nth-child(5) {
  animation: left 6s .8s infinite;
}
.square:nth-child(6) {
  animation: right 6s  infinite;
}
.square:nth-child(7) {
  animation: right 6s .2s infinite;
}
.square:nth-child(8) {
  animation: right 6s .4s infinite;
}
.square:nth-child(9) {
  animation: right 6s .6s infinite;
}
.square:nth-child(10) {
  animation: right 6s .8s infinite;
}

</style>

    <script src="js/prefixfree.min.js"></script>

</head>

<body>
<div class='square'></div>
<div class='square'></div>
<div class='square'></div>
<div class='square'></div>
<div class='square'></div>
<div class='square'></div>
<div class='square'></div>
<div class='square'></div>
<div class='square'></div>
<div class='square'></div>
</body>
</html>

CSS代码(reset.css):

html,body,div,span,applet,object,iframe,h1,h2,h3,h4,h5,h6,p,blockquote,pre,a,abbr,acronym,address,big,cite,code,del,dfn,em,img,ins,kbd,q,s,samp,small,strike,strong,sub,sup,tt,var,b,u,i,center,dl,dt,dd,ol,ul,li,fieldset,form,label,legend,table,caption,tbody,tfoot,thead,tr,th,td,article,aside,canvas,details,embed,figure,figcaption,footer,header,hgroup,menu,nav,output,ruby,section,summary,time,mark,audio,video{margin:0;padding:0;border:0;font-size:100%;font:inherit;vertical-align:baseline}
article,aside,details,figcaption,figure,footer,header,hgroup,menu,nav,section{display:block}
body{line-height:1}
ol,ul{list-style:none}
blockquote,q{quotes:none}
blockquote:before,blockquote:after,q:before,q:after{content:'';content:none}
table{border-collapse:collapse;border-spacing:0}

CSS代码(style.css):

@keyframes left{0%{background:blue;transform:rotateX(90deg);}
50%{background:white;transform:translate(200px,0px) rotateX(0deg);}
100%{background:red;transform:translate(0px,0px) rotateX(90deg) scale(1.8);opacity:.1;}
}
@keyframes right{0%{background:red;transform:rotateX(90deg);}
50%{background:white;transform:translate(-200px,0px) rotateX(0deg);}
100%{background:blue;transform:translate(0px,0px) rotateX(90deg) scale(1.8);opacity:.1;}
}
body{background:black;}
.square{opacity:.6;position:absolute;top:0;left:0;bottom:0;right:0;width:40px;height:40px;margin:auto;background:black;}
.square:nth-child(1){animation:left 6s infinite;}
.square:nth-child(2){animation:left 6s .2s infinite;}
.square:nth-child(3){animation:left 6s .4s infinite;}
.square:nth-child(4){animation:left 6s .6s infinite;}
.square:nth-child(5){animation:left 6s .8s infinite;}
.square:nth-child(6){animation:right 6s infinite;}
.square:nth-child(7){animation:right 6s .2s infinite;}
.square:nth-child(8){animation:right 6s .4s infinite;}
.square:nth-child(9){animation:right 6s .6s infinite;}
.square:nth-child(10){animation:right 6s .8s infinite;}

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