CSS3 Tutorial
CSS3 HOMECSS3 Introduction
CSS3 Borders
CSS3 Backgrounds
CSS3 Text Effects
CSS3 Fonts
CSS3 2D Transforms
CSS3 3D Transforms
CSS3 Transitions
CSS3 Animations
CSS3 Multiple Columns
CSS3 User Interface
CSS3 References
CSS3 ReferenceCSS3 Browser Support
CSS3 Selectors
CSS3 Reference Aural
CSS3 Web Safe Fonts
CSS3 Units
CSS3 Colors
CSS3 Color Values
CSS3 Color Names
CSS3 Color HEX
CSS3 Backgrounds
CSS3 Backgrounds
CSS3 contains several new background properties,
which allow greater control
of the background element.
In this chapter you will learn about the following background properties:
- background-size
- background-origin
You will also learn how to use multiple background images.
Browser Support
| Property | Browser Support | ||||
|---|---|---|---|---|---|
| background-size | |||||
| background-origin | |||||
Firefox 3.6 and earlier does not support the background-origin property, and requires the prefix -moz- to support the background-size property.
Safari 4 requires the prefix -webkit- to support the new background properties.
Internet Explorer 9, Firefox 4, Chrome, Safari 5 and Opera support the new background properties.
CSS3 The background-size Property
The background-size property specifies the size of the background image.
Before CSS3, the background image size was determined by the actual size of the image. In CSS3 it is possible to specify the size of the background image, which allows us to re-use background images in different contexts.
You can specify the size in pixels or in percentages. If you specify the size as a percentage, the size is relative to the width and height of the parent element.
Example 1
Resize a background image:
{
background:url(img_flwr.gif);
-moz-background-size:80px 60px; /* Firefox 3.6 */
background-size:80px 60px;
background-repeat:no-repeat;
}
Try it yourself »
Example 2
Stretch the background image to completely fill the content area:
{
background:url(img_flwr.gif);
-moz-background-size:100% 100%; /* Firefox 3.6 */
background-size:100% 100%;
background-repeat:no-repeat;
}
Try it yourself »
CSS3 The background-origin Property
The background-origin property specifies the positioning area of the background images.
The background image can be placed within the content-box, padding-box, or border-box area.
Example
Position the background image within the content-box:
{
background:url(img_flwr.gif);
background-repeat:no-repeat;
background-size:100% 100%;
-webkit-background-origin:content-box; /* Safari */
background-origin:content-box;
}
Try it yourself »
CSS3 Multiple Background Images |
|
|
CSS3 allows you to use several background images for an element. |
Example
Set two background images for the body element:
{
background-image:url(img_flwr.gif),url(img_tree.gif);
}
Try it yourself »
New Background Properties
| Property | Description | CSS |
|---|---|---|
| background-clip | Specifies the painting area of the background images | 3 |
| background-origin | Specifies the positioning area of the background images | 3 |
| background-size | Specifies the size of the background images | 3 |
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