CSS3入门之转换

*:first-child {
margin-top: 0 !important;
}

body>*:last-child {
margin-bottom: 0 !important;
}

/* BLOCKS
=============================================================================*/

p, blockquote, ul, ol, dl, table, pre {
margin: 15px 0;
}

/* HEADERS
=============================================================================*/

h1, h2, h3, h4, h5, h6 {
margin: 20px 0 10px;
padding: 0;
font-weight: bold;
-webkit-font-smoothing: antialiased;
}

h1 tt, h1 code, h2 tt, h2 code, h3 tt, h3 code, h4 tt, h4 code, h5 tt, h5 code, h6 tt, h6 code {
font-size: inherit;
}

h1 {
font-size: 28px;
color: #000;
}

h2 {
font-size: 24px;
border-bottom: 1px solid #ccc;
color: #000;
}

h3 {
font-size: 18px;
}

h4 {
font-size: 16px;
}

h5 {
font-size: 14px;
}

h6 {
color: #777;
font-size: 14px;
}

body>h2:first-child, body>h1:first-child, body>h1:first-child+h2, body>h3:first-child, body>h4:first-child, body>h5:first-child, body>h6:first-child {
margin-top: 0;
padding-top: 0;
}

a:first-child h1, a:first-child h2, a:first-child h3, a:first-child h4, a:first-child h5, a:first-child h6 {
margin-top: 0;
padding-top: 0;
}

h1+p, h2+p, h3+p, h4+p, h5+p, h6+p {
margin-top: 10px;
}

/* LINKS
=============================================================================*/

a {
color: #4183C4;
text-decoration: none;
}

a:hover {
text-decoration: underline;
}

/* LISTS
=============================================================================*/

ul, ol {
padding-left: 30px;
}

ul li > :first-child,
ol li > :first-child,
ul li ul:first-of-type,
ol li ol:first-of-type,
ul li ol:first-of-type,
ol li ul:first-of-type {
margin-top: 0px;
}

ul ul, ul ol, ol ol, ol ul {
margin-bottom: 0;
}

dl {
padding: 0;
}

dl dt {
font-size: 14px;
font-weight: bold;
font-style: italic;
padding: 0;
margin: 15px 0 5px;
}

dl dt:first-child {
padding: 0;
}

dl dt>:first-child {
margin-top: 0px;
}

dl dt>:last-child {
margin-bottom: 0px;
}

dl dd {
margin: 0 0 15px;
padding: 0 15px;
}

dl dd>:first-child {
margin-top: 0px;
}

dl dd>:last-child {
margin-bottom: 0px;
}

/* CODE
=============================================================================*/

pre, code, tt {
font-size: 12px;
font-family: Consolas, "Liberation Mono", Courier, monospace;
}

code, tt {
margin: 0 0px;
padding: 0px 0px;
white-space: nowrap;
border: 1px solid #eaeaea;
background-color: #f8f8f8;
border-radius: 3px;
}

pre>code {
margin: 0;
padding: 0;
white-space: pre;
border: none;
background: transparent;
}

pre {
background-color: #f8f8f8;
border: 1px solid #ccc;
font-size: 13px;
line-height: 19px;
overflow: auto;
padding: 6px 10px;
border-radius: 3px;
}

pre code, pre tt {
background-color: transparent;
border: none;
}

kbd {
-moz-border-bottom-colors: none;
-moz-border-left-colors: none;
-moz-border-right-colors: none;
-moz-border-top-colors: none;
background-color: #DDDDDD;
background-image: linear-gradient(#F1F1F1, #DDDDDD);
background-repeat: repeat-x;
border-color: #DDDDDD #CCCCCC #CCCCCC #DDDDDD;
border-image: none;
border-radius: 2px 2px 2px 2px;
border-style: solid;
border-width: 1px;
font-family: "Helvetica Neue",Helvetica,Arial,sans-serif;
line-height: 10px;
padding: 1px 4px;
}

/* QUOTES
=============================================================================*/

blockquote {
border-left: 4px solid #DDD;
padding: 0 15px;
color: #777;
}

blockquote>:first-child {
margin-top: 0px;
}

blockquote>:last-child {
margin-bottom: 0px;
}

/* HORIZONTAL RULES
=============================================================================*/

hr {
clear: both;
margin: 15px 0;
height: 0px;
overflow: hidden;
border: none;
background: transparent;
border-bottom: 4px solid #ddd;
padding: 0;
}

/* IMAGES
=============================================================================*/

img {
max-width: 100%
}
-->

1、CSS3 转换

1.1、转换是什么，能实现哪些效果？

转换是使元素改变形状、尺寸和位置的一种效果，主要能实现的效果如下：

1. 移动
2. 缩放
3. 转动
4. 拉长
5. 拉伸

1.2、浏览器兼容

CSS3的转换属性为 transform ，IE10+,Firefox,Chrome,Opera,Safari等现代浏览器支持transform属性，IE9需要-ms-前缀。

2、 2D 转换

准备工作：

<style>
  .container{
    position:relative;border:1px solid red; width: 100px; height: 100px;
  }
  .container>div{
    width: 50px; height: 50px; background: gray;
  }
</style>

2.1、translate() -- 移动

translate(/*x坐标移动位移*/ left, /*y坐标移动位移*/ top)

<h3>右移20px</h3>
<div class="container">
  <div style="transform: translate(20px);"></div>
</div>
<h3>下移20px</h3>
<div class="container">
  <div style="transform: translate(0px,20px);"></div>
</div>
<h3>左移20px，下移20px</h3>
<div class="container">
  <div style="transform: translate(-20px,20px);"></div>
</div>

右移20px

下移20px

左移20px，下移20px

2.2、rotate() -- 旋转

rotate(/*旋转角度*/ deg)

<h3>旋转135度</h3>
<div class="container">
  <div style="transform: rotate(135deg);"></div>
</div>

旋转135度

2.3、scale() -- 缩放

scale(/*宽度缩放比例*/ widthScale, /*高度缩放比例*/ heightScale)

<h3>缩放到0.5倍</h3>
<div class="container">
  <div style="transform: scale(0.5, 0.5);"></div>
</div>
<h3>宽度缩放到1.5倍，高度缩放到0.25倍</h3>
<div class="container">
  <div style="transform: scale(1.5, 0.25);"></div>
</div>

缩放到0.5倍

宽度缩放到1.5倍，高度缩放到0.25倍

2.4、skew() -- 倾斜

skew(/*X轴倾斜角度*/ xDeg, /*Y轴倾斜角度*/ yDeg)

<h3>X轴翻转30度</h3>
<div class="container">
  <div style="transform: skew(30deg);"></div>
</div>
<h3>X轴翻转30度，Y轴翻转10度</h3>
<div class="container">
  <div style="transform: skew(30deg, 10deg)"></div>
</div>

X轴翻转30度

X轴翻转30度，Y轴翻转10度

2.5、matrix() --矩阵

<h3>旋转30度</h3>
<div class="container">
  <div style="transform: matrix(0.866,0.5,-0.5,0.866,0,0)"></div>
</div>

旋转30度

2.6 Transform方法

3、3D 转换

3.1、rotateX、rotateY

<div class="container">
  <div style="transform: rotateY(0deg)" id="fun2"></div>
</div>
<script>
function fun2 (element) {
  var i = 0;
  var interval = setInterval(function(){
    element.style.transform = ‘rotateY(‘ + i + ‘deg)‘;
    i++;
  }, 5);
}
fun2(document.getElementById(‘fun2‘));
</script>

3.2、Transform方法