Using CSS sprites for background images

I have been focusing on improving the performance of my web application, and one approach I took was to utilize CSS sprites. All of my images are now consolidated in a single .png file named images.png.

While CSS sprites have worked effectively for displaying images once within css classes, I encountered an issue with images that needed to be repeated. For example, I have a banner.png image used as the background for a banner. When I attempted to set the background-repeat property, the image did not repeat as desired. Below are my CSS definitions:

Before CSS Sprites
------------------
.ghwc {
  background-image: url(/images/layout/banner.png);
  background-repeat:repeat-x;
  color:White;
  width:300px;
}

After CSS Sprites
-----------------
.ghwc {
  background-image: url(/images/images.png);
  background-repeat:repeat-x;
  color:White; 
  background-position:60px 319px; 
  width:300px;
}

My query is how to effectively implement CSS sprites for repeated images such as backgrounds?

Thank you,

css

Answer №1

I'm curious about implementing CSS sprites for repetitive background images. Can you provide guidance on how to achieve this?

Unfortunately, using CSS sprites for repeated images is not feasible. At present, there is no way to specify a specific area of an image to repeat in CSS 2 or 3.

Answer №2

If you want to achieve a background-repeat effect similar to repeat-x, simply ensure that all backgrounds within the sprite image container have consistent width and arrange the sprite image vertically. This way, your background position property will always start at 0 for the x-coordinate and adjust the y-coordinate accordingly (e.g. 

background-position:0 0; background-position:0 -100px; background-position:0 -200px;
). However, keep in mind that this method may not be compatible with all browsers unless you can specify the precise height and enforce overflow:hidden.

Answer №3

If the background image you are using (images.png) appears on the screen, then your code should be functioning properly. In order for it to display correctly on Opera and Firefox, make sure to include this line:

background-attachment:fixed;

On second thought, it seems like you might be referring to a specific section of a "sprite" image that contains multiple images. It's not possible to have just one part of an image repeat in that manner. Instead, crop the image to the desired size and proceed with the existing code.

Answer №4

To utilize repeat-x effectively, avoid placing multiple images side by side in your sprite since the entire sprite will be duplicated horizontally (as you've likely observed). Instead, consider arranging them in a single vertical line. The same principle applies if you're looking to use repeat-y. As of now, there is no feature like "background-crop" (perhaps it will be introduced in CSS4? ;)

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