How can I convert a background image source into a fluid list item with a display property of inline-block?

I have a unique image with dimensions width: 656px and height: 60px that serves as the background for my menu. Each menu button has a specific position within the image, for example, the menu button for 'media' is located at (188x, 0y), with a width of 104 and a height of 30:

https://i.stack.imgur.com/Df6uz.png

Each li element has its own distinct id.

If you prefer percentages, the position would be (28.659%x, 0%y) with a width of 15.854% and a height of 50% relative to the entire image.

The actual height of the menu could be 1em or 2em depending on various factors.

My goal in CSS is to:

  • Maintain the height of each li element
  • Preserve the aspect ratio (e.g., 3.466:1 for 'media')
  • Set each <li>'s width to be 3.466 times its height
  • Fill it with background from the source image, adjusting the stretching or shrinking of the background accordingly

In pseudo code, this seems straightforward:

li.w = li.h * 3.466;
StretchBlt(src, 188, 0, 104, 30, li, 0, 0, li.w, li.h);

But how can I achieve this using CSS?

cssfluid-images

Answer №1

If you're looking to incorporate some basic math into your CSS, the calc() function can come in handy. This is especially useful when dealing with a fixed height specified in pixels and needing to perform simple calculations. For more information on browser support for this feature, refer to this link.

Regarding your inquiry about filling an element with background from a source and adjusting it accordingly by stretching or shrinking, I'm not entirely clear on what you mean.

Feel free to check out this Fiddle for a working example of how calc() can be implemented in CSS:

div {
    background: red;
    height: 60px;
    width: calc(60px * 3.466);
}
<div>div</div>

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