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css3(转)

2024-09-22 12:28:01   216人阅读

1.渐变：Gradients

线性渐变 - 从上到下（默认情况下）

#grad {
  background: -webkit-linear-gradient(red, blue); /* Safari 5.1 - 6.0 */
  background: -o-linear-gradient(red, blue); /* Opera 11.1 - 12.0 */
  background: -moz-linear-gradient(red, blue); /* Firefox 3.6 - 15 */
  background: linear-gradient(red, blue); /* 标准的语法 */
}

线性渐变 - 从左到右

#grad {
  background: -webkit-linear-gradient(left, red , blue); /* Safari 5.1 - 6.0 */
  background: -o-linear-gradient(right, red, blue); /* Opera 11.1 - 12.0 */
  background: -moz-linear-gradient(right, red, blue); /* Firefox 3.6 - 15 */
  background: linear-gradient(to right, red , blue); /* 标准的语法 */
}

2.CSS3 过渡，CSS3中，我们为了添加某种效果可以从一种样式转变到另一个的时候，无需使用Flash动画或JavaScript。

技术分享 
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"> 
<title>菜鸟教程(runoob.com)</title>
<style> 
div {
    width: 100px;
    height: 100px;
    background: red;
    -webkit-transition: width 2s, height 2s, -webkit-transform 2s; /* For Safari 3.1 to 6.0 */
    transition: width 2s, height 2s, transform 2s;
}

div:hover {
    width: 200px;
    height: 200px;
    -webkit-transform: rotate(180deg); /* Chrome, Safari, Opera */
    transform: rotate(180deg);
}
</style>
</head>
<body>
<p><b>注意：</b>该实例无法在 Internet Explorer 9 及更早 IE 版本上工作。</p>

<div>鼠标移动到 div 元素上，查看过渡效果。</div>
</body>
</html>
View Code

 3.动画：@keyframes规则是创建动画。 @keyframes规则内指定一个CSS样式和动画将逐步从目前的样式更改为新的样式。

技术分享 
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"> 
<title>菜鸟教程(runoob.com)</title>
<style> 
div
{
    width:100px;
    height:100px;
    background:red;
    position:relative;
    animation:myfirst 5s linear 2s infinite alternate;
    /* Firefox: */
    -moz-animation:myfirst 5s linear 2s infinite alternate;
    /* Safari and Chrome: */
    -webkit-animation:myfirst 5s linear 2s infinite alternate;
    /* Opera: */
    -o-animation:myfirst 5s linear 2s infinite alternate;
}

@keyframes myfirst
{
    0%   {background:red; left:0px; top:0px;}
    25%  {background:yellow; left:200px; top:0px;}
    50%  {background:blue; left:200px; top:200px;}
    75%  {background:green; left:0px; top:200px;}
    100% {background:red; left:0px; top:0px;}
}

@-moz-keyframes myfirst /* Firefox */
{
    0%   {background:red; left:0px; top:0px;}
    25%  {background:yellow; left:200px; top:0px;}
    50%  {background:blue; left:200px; top:200px;}
    75%  {background:green; left:0px; top:200px;}
    100% {background:red; left:0px; top:0px;}
}

@-webkit-keyframes myfirst /* Safari and Chrome */
{
    0%   {background:red; left:0px; top:0px;}
    25%  {background:yellow; left:200px; top:0px;}
    50%  {background:blue; left:200px; top:200px;}
    75%  {background:green; left:0px; top:200px;}
    100% {background:red; left:0px; top:0px;}
}

@-o-keyframes myfirst /* Opera */
{
    0%   {background:red; left:0px; top:0px;}
    25%  {background:yellow; left:200px; top:0px;}
    50%  {background:blue; left:200px; top:200px;}
    75%  {background:green; left:0px; top:200px;}
    100% {background:red; left:0px; top:0px;}
}
</style>
</head>
<body>

<p><b>注意:</b> 该实例在 Internet Explorer 9 及更早 IE 版本是无效的。</p>

<div></div>

</body>
</html>
View Code

4.CSS3 的文本阴影:text-shadow

技术分享 
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"> 
<title>菜鸟教程(runoob.com)</title> 
<style>
h1
{
    text-shadow: 5px 5px 5px #FF0000;
}
</style>
</head>
<body>

<h1>Text-shadow effect!</h1>

<p><b>注意:</b> Internet Explorer 9 以及更早版本的浏览器不支持 text-shadow属性.</p>

</body>
</html>
View Code

5.多媒体查询:@media 规则

*使用多媒体查询可以在指定的设备上使用对应的样式替代原有的样式；以下实例在屏幕可视窗口尺寸大于 480 像素时将菜单浮动到页面左侧：

技术分享 
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta charset="utf-8"> 
<title>菜鸟教程(runoob.com)</title> 
<style>
.wrapper {overflow:auto;}

#main {margin-left: 4px;}
#leftsidebar {float: none;width: auto;}
#menulist {margin:0;padding:0;}

.menuitem {
    background:#CDF0F6;
    border:1px solid #d4d4d4;
    border-radius:4px;
    list-style-type:none;
    margin:4px;
    padding:2px;
}

@media screen and (min-width: 480px) {
    #leftsidebar {width:200px;float:left;}
    #main {margin-left:216px;}
}
</style>
</head>
<body>

<div class="wrapper">
  <div id="leftsidebar">
    <ul id="menulist">
      <li class="menuitem">Menu-item 1</li>
      <li class="menuitem">Menu-item 2</li>
      <li class="menuitem">Menu-item 3</li>
      <li class="menuitem">Menu-item 4</li>
      <li class="menuitem">Menu-item 5</li>
   </ul>
  </div>
  <div id="main">
    <h1>重置浏览器窗口查看效果！</h1>
    <p>在屏幕可视窗口尺寸大于 480 像素时将菜单浮动到页面左侧。</p>
  </div>
</div>

</body>
</html>
View Code

6.resize 属性

*指定一个div元素，允许用户调整大小：

技术分享 
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"> 
<title>菜鸟教程(runoob.com)</title>
<style> 
div
{
    border:2px solid;
    padding:10px 40px; 
    width:300px;
    resize:both;
    overflow:auto;
}
</style>
</head>
<body>

<p><b>注意:</b> Firefox, Safari,和 Chrome 兼容 resize 属性.</p>

<div>调整属性指定一个元素是否由用户可调整大小的。.</div>

</body>
</html>
View Code

 

 

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css3(转)


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