大疆官网的视频加载动画 by css3 animation

用的时候得注意下兼容性，现代浏览器chrome、ff、edge以及移动端都是可以的，ie 9以下的就不行了。

代码如下：

　　css样式

.spinner {
    margin: 0 auto;
    width: 82px;
    text-align: center;
}
#fancybox-loading {
    position: fixed;
    top: 50%;
    left: 50%;
    margin-top: -9px;
    margin-left: -41px;
    opacity: .8;
    cursor: pointer;
    z-index: 8060;
}
.spinner>div {
    margin: 0 2px;
    width: 18px;
    height: 18px;
    background-color: #333;
    -webkit-border-radius: 100%;
    -moz-border-radius: 100%;
    -ms-border-radius: 100%;
    -o-border-radius: 100%;
    border-radius: 100%;
    display: inline-block;
     -webkit-animation: sk-bouncedelay 1.4s infinite ease-in-out both; 
    -moz-animation: sk-bouncedelay 1.4s infinite ease-in-out both;
    -ms-animation: sk-bouncedelay 1.4s infinite ease-in-out both;
    -o-animation: sk-bouncedelay 1.4s infinite ease-in-out both;
     animation: sk-bouncedelay 1.4s infinite ease-in-out both; 
}
.spinner .bounce1 {
    -webkit-animation-delay: -.32s;
    -moz-animation-delay: -.32s;
    -ms-animation-delay: -.32s;
    -o-animation-delay: -.32s;
    animation-delay: -.32s;
}    
.spinner .bounce2 {
    -webkit-animation-delay: -.16s;
    -moz-animation-delay: -.16s;
    -ms-animation-delay: -.16s;
    -o-animation-delay: -.16s;
    animation-delay: -.16s;
}
@keyframes sk-bouncedelay {
    0%,80%,100% {
        -webkit-transform: scale(0);
        -moz-transform: scale(0);
        -ms-transform: scale(0);
        -o-transform: scale(0);
        transform: scale(0)
    }
    40% {
        -webkit-transform: scale(1);
        -moz-transform: scale(1);
        -ms-transform: scale(1);
        -o-transform: scale(1);
        transform: scale(1)
    }
}

　html结构

<div id="fancybox-loading" class="spinner">
    <div class="bounce1"></div>
    <div class="bounce2"></div>
    <div class="bounce3"></div>
</div>

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