CSS 4.2.4参考手册
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本文档使用 php.cn手册 发布

文字

语法：

animation-direction：<single-animation-direction>[,<single-animation-direction>]*

<single-animation-direction> = normal | reverse | alternate | alternate-reverse

默认值：normal

适用于：所有元素，包含伪对象:after和:before

继承性：无

动画性：否

计算值：指定值

媒体：视觉

取值：

  • normal：正常方向

  • reverse：反方向运行

  • alternate：动画先正常运行再反方向运行，并持续交替运行

  • alternate-reverse：动画先反运行再正方向运行，并持续交替运行

说明：

检索或设置对象动画在循环中是否反向运动

  • 如果提供多个属性值，以逗号进行分隔。

  • 对应的脚本特性为animationDirection。

兼容性：

ValuesIEFirefoxChromeSafariOperaiOS SafariAndroid BrowserAndroid Chrome
Basic Support6.0-9.02.0-4.04.0-42.0-webkit-6.0-8.0-webkit-15.0-29.0-webkit-6.0-8.4-webkit-2.1-3.0-webkit- #118.0-42.0-webkit-
10.0+5.0-15.0-moz-43.0+9.0+30.0+9.0+4.0-40.0-webkit-
16.0+

  1. 在一些场景中会有错误行为

  2. 部分浏览器不支持伪元素动画，或者支持得不够好，尽可能不要利用伪元素来做动画

示例：

实例

<!DOCTYPE html>
<html lang="zh-cmn-Hans">
<head>
<meta charset="utf-8" />
<title>animation-direction_CSS参考手册_web前端开发参考手册系列</title>
<meta name="author" content="Joy Du(飘零雾雨), dooyoe@gmail.com, www.doyoe.com" />
<style>
h1{font-size:16px;}
div{width:100px;height:100px;padding:10px;border-radius:61px;box-shadow:0 0 10px rgba(204,102,0,.8);background:#F6D66E;background:-moz-linear-gradient(top,#fff,#F6D66E);background:-webkit-linear-gradient(top,#fff,#F6D66E);background:linear-gradient(to bottom,#fff,#F6D66E);
	-moz-animation:animations 1.5s ease infinite alternate;
	-webkit-animation:animations 1.5s ease infinite alternate;
	animation:animations 1.5s ease infinite alternate;
}
@-webkit-keyframes animations{
	0%{-webkit-transform:translate(0,0);}
	50%{-webkit-transform:translate(100px,100px);}
	100%{-webkit-transform:translate(100px,0);}
}
@-moz-keyframes animations{
	0%{-moz-transform:translate(0,0);}
	50%{-moz-transform:translate(100px,100px);}
	100%{-moz-transform:translate(100px,0);}
}
@keyframes animations{
	0%{transform:translate(0,0);}
	50%{ransform:translate(100px,100px);}
	100%{transform:translate(100px,0);}
}
</style>
</head>
<body>
<h1>弹性运动的太阳：</h1>
<div></div>
</body>
</html>

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