Most of the images on my website are optimized using sprite sheets, where multiple images are combined into one file to enhance user experience. This method reduces the number of server requests for individual images.
However, I'm facing an issue when attempting to use abbreviated versions of the CSS background property for multiple elements. My attempts to streamline the code have not been successful.
For example, let's say I have three DIV tags with IDs X, Y, and Z, and I want to use a sprite sheet named spritesheet.jpg for them:
#X,#Y,#Z {background:url('spritesheet.jpg')}
Next, I define the dimensions for each box. For example, X should be 600x5 pixels, Y should be 10x20 pixels, and Z should be 20x10 pixels:
#X {width:600px;height:5px}
#Y {width:10px;height:20px}
#Z {width:20px;height:10px}
Then, I want to assign different background colors to X, Y, and Z, such as red, green, and blue, respectively:
#X {background-color:#FF0000}
#Y {background-color:#00FF00}
#Z {background-color:#0000FF}
Each box should also display a specific section of the sprite sheet. For instance:
#X {background-position:0 -10px}
#Y {background-position:-60px -20px}
#Z {background-position:-110px -20px}
Additionally, I want box X to repeat the tile horizontally:
#X {background-repeat: repeat-x}
As you can see, the code to achieve this is lengthy and repetitive:
#X,#Y,#Z {background:url('spritesheet.jpg')}
#X {width:600px;height:5px}
#Y {width:10px;height:20px}
#Z {width:20px;height:10px}
#X {background-color:#FF0000}
#Y {background-color:#00FF00}
#Z {background-color:#0000FF}
#X {background-position:0 -10px}
#Y {background-position:-60px -20px}
#Z {background-position:-110px -20px}
#X {background-repeat: repeat-x}
I'm looking for a more concise way to load CSS sprites without having to specify background properties for each element every time.
My goal is to implement progressive loading on my website to create a faster user experience, with particular emphasis on applying background positions after image loading.