Let me summarize some background attributes of CSS and the new background attributes of CSS3.
background:
background-color:Background color
background-image:Background image
background-repeat:Background repeat
background-position:Background positioning
background-attachment:Background fixed/fixed )
background-size background-size
background-size:x y
background-size:100% 100%
background-size:cover proportional enlargement
background-size:contain contains (image does not overflow)
Multiple backgrounds
background:url() 0 0,url() 0 100%;
background-origin Background area positioning
Border-box: Display the background starting from the border area.
padding-box: Display the background starting from the padding area.
content-box: Display the background starting from the content area.
background-clip Background drawing area
border-box: Crop the background outward from the border area.
padding-box: Crop the background outward from the padding area.
Content-box: Crop the background outward from the content area.
text: background fill text //Not supported
no-clip: Crop the background outward from the border area.
Color gradient
Linear gradient: -webkit-linear-gradient(starting point/angle, color position,...,)
Starting point: left/top/right/ bottom/left top...Default top
Angle: counterclockwise 0-360 degrees
Color position: red 0, blue 50%, yellow 100% (red starts from 50 % Gradient to 100% blue)
Color gradient
repeating-linear-gradient Linear gradient repeating tile
IE low version gradient (filter):
filter:progid:DXImageTransform.Microsoft.gradient(startColorstr='#ffffff',endColorstr='#ff0000',GradientType='1');
Color Gradient
Path Gradient: radial-gradient (starting point (center position of circle), shape/radius/size, color 1, color 2)
Starting point: left/top/right/bottom or specific value/percentage
Shape: ellipse, circle
Size: specific value or percentage, or keyword (closest-side (closest-side), closest-corner (closest corner), farthest- side (farthest end), farthest-corner (farthest corner), contain (include), cover (cover));
Note: Firefox currently only supports the keyword
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