CSS3 transition动画
1、transition-property 设置过渡的属性，比如：width height background-color
2、transition-duration 设置过渡的时间，比如：1s 500ms
3、transition-timing-function 设置过渡的运动方式
- linear 匀速
- ease 开始和结束慢速
- ease-in 开始是慢速
- ease-out 结束时慢速
- ease-in-out 开始和结束时慢速
- cubic-bezier(n,n,n,n)
- 比如：cubic-bezier(0.845, -0.375, 0.215, 1.335)
- 曲线设置网站：https://matthewlein.com/ceaser/
4、transition-delay 设置动画的延迟
5、transition: property duration timing-function delay 同时设置四个属性
举例：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>圆角</title>
<style type="text/css">
.box{
width:100px;
height:100px;
background-color:gold;
transition:width 300ms ease,height 300ms ease 300ms,background-color 300ms ease 600ms;
}
.box:hover{
width:300px;
height:300px;
background-color:red;
}
</style>
</head>
<body>
<div class="box"></div>
</body>
</html>
CSS3 transform变换
1、translate(x,y) 设置盒子位移
2、scale(x,y) 设置盒子缩放
3、rotate(deg) 设置盒子旋转
4、skew(x-angle,y-angle) 设置盒子斜切
5、perspective 设置透视距离
6、transform-style flat | preserve-3d 设置盒子是否按3d空间显示
7、translateX、translateY、translateZ 设置三维移动
8、rotateX、rotateY、rotateZ 设置三维旋转
9、scaleX、scaleY、scaleZ 设置三维缩放
10、tranform-origin 设置变形的中心点
11、backface-visibility 设置盒子背面是否可见
举例：（翻面效果）
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>翻面</title>
<style type="text/css">
.box{
width:300px;
height:272px;
margin:50px auto 0;
transform-style:preserve-3d;
position:relative;
}
.box .pic{
width:300px;
height:272px;
position:absolute;
background-color:cyan;
left:0;
top:0;
transform:perspective(800px) rotateY(0deg);
backface-visibility:hidden;
transition:all 500ms ease;
}
.box .back_info{
width:300px;
height:272px;
text-align:center;
line-height:272px;
background-color:gold;
position:absolute;
left:0;
top:0;
transform:rotateY(180deg);
backface-visibility:hidden;
transition:all 500ms ease;
}
.box:hover .pic{
transform:perspective(800px) rotateY(180deg);
}
.box:hover .back_info{
transform:perspective(800px) rotateY(0deg);
}
</style>
</head>
<body>
<div class="box">
<div class="pic"><img src="images/location_bg.jpg"></div>
<div class="back_info">背面文字说明</div>
</div>
</body>
</html>
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