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css3动画实现loading

2017-11-19 21:21 579 查看


html

<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<link rel="stylesheet" href="css/index.css">
</head>
<body>
<div class="loading">
<div class="round left-round"></div>
<div class="round right-round"></div>
</div>
</body>
</html>


css
.loading {
width: 50px;
height: 15px;
position: fixed;
left: 50%;
top: 50%;
opacity: 0;
transform: translate(-50%, -50%);
-webkit-transform: translate(-50%, -50%);
/*safari and chrome*/
-ms-transform: translate(-50%, -50%);
/*IE 9*/
-moz-transform: translate(-50% -50%);
/*firefox*/
-o-transform: translate(-50%, -50%);
/*opera*/
animation: fadeIn 0.5s ease-in-out 1;
-webkit-animation: fadeIn 0.5s ease-in-out 1;
animation-fill-mode: forwards;
-webkit-animation-fill-mode: forwards;
}

.loading .round {
width: 15px;
height: 15px;
border-radius: 50%;
display: inline-block;
position: absolute;
z-index: 0;
animation: rotate .5s ease-in-out infinite alternate,zIndex 1s ease-in-out infinite;
-webkit-animation: rotate .5s ease-in-out infinite alternate,zIndex 1s ease-in-out infinite;
}

.loading .round.left-round {
background: #FFA217;
}

.loading .round.right-round {
background: #3E7CD4;
animation-delay: -0.5s;
-webkit-animation-delay: -0.5s;
}

@keyframes rotate {
100% {
transform: translate(35px);
-webkit-transform: translate(35px);
}
}

@keyframes zIndex {
25% {
z-index: 1;
}
75% {
z-index: -1;
}
}

@keyframes fadeIn {
100% {
opacity: 1;
}
}
                                            

                                        

                        
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