CSS3 Borders
With CSS3, you can create rounded borders, add shadow boxes
In this chapter, you You will learn about the following border properties
| Properties | Description | CSS |
|---|---|---|
| border- image | Sets the shorthand properties of all border images. | 3 |
| border-radius | A shorthand property for setting all four border-*-radius properties | 3 |
| Append the shadow of one or more drop-down boxes | 3 |
##CSS3 Rounded CornersAdding rounded corners in CSS2 is tricky. We had to use different images in every corner.
In CSS3, it is easy to create rounded corners.
The border-radius property is used to create rounded corners in CSS3:
Example
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>php中文网(php.cn)</title>
<style>
div
{
border:2px solid #4269e1;
padding:10px 40px;
background: #d8dd2e;
width:150px;
border-radius:25px;
}
</style>
</head>
<body>
<div>圆角边框！</div>
</body>
</html>CSS3 box shadowThe box-shadow property in CSS3 is used to add a shadow:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>php中文网(php.cn)</title>
<style>
div
{
width:300px;
height:100px;
background-color:yellow;
box-shadow: 10px 10px 5px #47d1b1;
text-align: center;
}
</style>
</head>
<body>
<div>CSS3盒阴影</div>
</body>
</html> Run the program to try it
CSS3 border imageWith the CSS3 border-image property, you can use images Create a border: The
border-image property allows you to specify an image as a border!
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>PHP中文网（php.cn)</title>
<style>
div
{
border:15px solid transparent;
width:250px;
padding:10px 20px;
}
#round
{
-webkit-border-image:url(/upload/course/000/000/006/58a4feb498981164.png) 30 30 round; /* Safari 5 and older */
-o-border-image:url(/upload/course/000/000/006/58a4feb498981164.png) 30 30 round; /* Opera */
border-image:url(/upload/course/000/000/006/58a4feb498981164.png) 30 30 round;
}
#stretch
{
-webkit-border-image:url(/upload/course/000/000/006/58a4feb498981164.png) 30 30 stretch; /* Safari 5 and older */
-o-border-image:url(/upload/course/000/000/006/58a4feb498981164.png) 30 30 stretch; /* Opera */
border-image:url(/upload/course/000/000/006/58a4feb498981164.png) 30 30 stretch;
}
</style>
</head>
<body>
<p> border-image 属性用于设置图片的边框。</p>
<div id="round">这里，图像平铺（重复）来填充该区域。</div>
<br>
<div id="stretch">这里，图像被拉伸以填充该区域。</div>
<p>这是我们使用的图片素材：</p>
<img src="http://www.runoob.com/images/border.png" />
</body>
</html>Run the program and try it
