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

The numbers in the table specify the first browser version that fully supports the property.

Numbers followed by -webkit-, -moz-, or -o- specify the first version that worked with a prefix.

Property
background-size 9.0 4.0
1.0 -webkit-		 4.0
3.6 -moz-		 4.1
3.0 -webkit-		 10.5
10.0 -o-
background-origin 9.0 1.0 4.0 3.0 10.5

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:

div {
    background: url(img_flwr.gif);
    background-size: 80px 60px;
    background-repeat: no-repeat;
}

Try it yourself »

Example 2

Stretch the background image to completely fill the content area:

div {
    background: url(img_flwr.gif);
    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:

div {
    background: url(img_flwr.gif);
    background-repeat: no-repeat;
    background-size: 100% 100%;
    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:

body {
    background: url(img_tree.gif), url(img_flwr.gif);
    background-size: 100% 100%;
    background-repeat: no-repeat;
}

Try it yourself »

CSS3 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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