loading加载效果

<style>
html{
	font-size: 100px;
}
#loading_div {
  width: 100%;
  height: 100%;
  background: none;
  position: fixed;
  top: 0;
  left: 0;
  z-index: 9999;
  text-align: center;
}
#loading_div .bg {
  width: 2.2rem;
  height: 1.2rem;
  background: #000000;
  opacity: 0.6;
  -khtml-opacity: 0.6;
  filter: alpha(opacity=60);
  -moz-opacity: 0.6;
  position: fixed;
  top: 50%;
  left: 50%;
  z-index: 1003;
  margin-left: -1.1rem;
  margin-top: -0.6rem;
  z-index: 3000;
  -webkit-border-radius: 0.2rem;
  -moz-border-radius: 0.2rem;
  -ms-border-radius: 0.2rem;
  -o-border-radius: 0.2rem;
  border-radius: 0.2rem;
}
.spinner {
  width: 0.52rem;
  height: 0.52rem;
  position: fixed;
  top: 50%;
  left: 50%;
  z-index: 9999;
  margin-left: -0.26rem;
  margin-top: -0.26rem;
}
.container1 > div,
.container2 > div,
.container3 > div {
  width: 6px;
  height: 6px;
  background-color: #FFFFFF;
  border-radius: 100%;
  position: absolute;
  -webkit-animation: bouncedelay 1.2s infinite ease-in-out;
  animation: bouncedelay 1.2s infinite ease-in-out;
  -webkit-animation-fill-mode: both;
  animation-fill-mode: both;
}
.spinner .spinner-container {
  position: absolute;
  width: 100%;
  height: 100%;
}
.container2 {
  -webkit-transform: rotateZ(45deg);
  transform: rotateZ(45deg);
}
.container3 {
  -webkit-transform: rotateZ(90deg);
  transform: rotateZ(90deg);
}
.circle1 {
  top: 0;
  left: 0;
}
.circle2 {
  top: 0;
  right: 0;
}
.circle3 {
  right: 0;
  bottom: 0;
}
.circle4 {
  left: 0;
  bottom: 0;
}
.container2 .circle1 {
  -webkit-animation-delay: -1.1s;
  animation-delay: -1.1s;
}
.container3 .circle1 {
  -webkit-animation-delay: -1s;
  animation-delay: -1s;
}
.container1 .circle2 {
  -webkit-animation-delay: -0.9s;
  animation-delay: -0.9s;
}
.container2 .circle2 {
  -webkit-animation-delay: -0.8s;
  animation-delay: -0.8s;
}
.container3 .circle2 {
  -webkit-animation-delay: -0.7s;
  animation-delay: -0.7s;
}
.container1 .circle3 {
  -webkit-animation-delay: -0.6s;
  animation-delay: -0.6s;
}
.container2 .circle3 {
  -webkit-animation-delay: -0.5s;
  animation-delay: -0.5s;
}
.container3 .circle3 {
  -webkit-animation-delay: -0.4s;
  animation-delay: -0.4s;
}
.container1 .circle4 {
  -webkit-animation-delay: -0.3s;
  animation-delay: -0.3s;
}
.container2 .circle4 {
  -webkit-animation-delay: -0.2s;
  animation-delay: -0.2s;
}
.container3 .circle4 {
  -webkit-animation-delay: -0.1s;
  animation-delay: -0.1s;
}
@-webkit-keyframes bouncedelay {
  0%,
  80%,
  100% {
    -webkit-transform: scale(0);
  }
  40% {
    -webkit-transform: scale(1);
  }
}
@keyframes bouncedelay {
  0%,
  80%,
  100% {
    transform: scale(0);
    -webkit-transform: scale(0);
  }
  40% {
    transform: scale(1);
    -webkit-transform: scale(1);
  }
}

</style>

　　

<div id='loading_div'>
	        <div class="bg"></div>
	        <div class="spinner">
	          <div class="spinner-container container1">
	            <div class="circle1"></div>
	            <div class="circle2"></div>
	            <div class="circle3"></div>
	            <div class="circle4"></div>
	          </div>
	          <div class="spinner-container container2">
	            <div class="circle1"></div>
	            <div class="circle2"></div>
	            <div class="circle3"></div>
	            <div class="circle4"></div>
	          </div>
	          <div class="spinner-container container3">
	            <div class="circle1"></div>
	            <div class="circle2"></div>
	            <div class="circle3"></div>
	            <div class="circle4"></div>
	          </div>
	        </div>
</div>

　　

引入JS文件<script type="text/javascript" src="js/setFontSize.js" ></script>

注意：JS文件要在

html{
	font-size: 100px;
}
后面引入