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| CSS3 Backgrounds |
CSS3 Backgrounds
The CSS background shorthand property is used to define multiples properties like :
background-color, background-image, background-repeat, background-attachment and background-position
Background Color
The background-color property specifies the background color of an element.
background-color : #F00;
Background Image
The background-image property specifies an image to use as background of an element.
By default, the image repeat itself to covers the entire surface of the element.
background-image: url("GitHub-Mark.png");
Background Image - Repetition
By default, the background-image property repeats on the X and Y axis.
If you want to set an axis, like X axis, use background-repeat property type:
background-image: url("GitHub-Mark.png");
background-repeat: repeat-x;
But sometimes you don't want to have your background on all the surface, you've to specify it by typing:
background-image: url("GitHub-Mark.png");
background-repeat: no-repeat;
Background Image - Position
You can specify the position of the background by typing :
background-image: url("GitHub-Mark.png");
background-repeat: no-repeat;
background-position : left bottom;
It will set you background at the bottom left of the element.
Background Image - Fixed Position
If you want to have a background image which will not scroll with the rest of the page, you can use background-attachement property:
background-image: url("GitHub-Mark.png");
background-repeat: no-repeat;
background-position: left bottom;
background-attachment: fixed;
Shorthand property
You can pass all the properties in one super-property background :
background: #F00 url("GitHub-Mark.png") no-repeat fixed left bottom;
When you use the shorthand property, you have to respect this order:
- Background color
- Background image
- Background repeat
- Background attachment
- Background position
It doesn't matter if one property is missing, as long as you respect the order:
background: url("GitHub-Mark.png") no-repeat left bottom;
This will work even if the color and the attachment are missing.