How float elements can affect z-index through opacity

While troubleshooting the alignment of my floated images, I came across an unexpected issue related to opacity:

http://jsfiddle.net/tshwbnLo/

It appears that when an element has opacity, it does not adhere to the usual behavior and instead overlaps the floated image. This caused some headers with a border-bottom to be drawn over the image.

Even trying to manually set the z-index with position: relative did not solve the problem, as I still needed the floating image to maintain its intended function

Answer №1

My recent discovery for this issue involves using RGBA colors instead of applying a general opacity setting, like so:

color: rgba(?, ?, ?, opacity)
border-color: rgba(?, ?, ?, opacity)
background-color: rgba(?, ?, ?, opacity)

However, I can't help but wonder if there is a simpler or more elegant solution available. It feels like more of a workaround than a true fix, especially considering the strange z-index behavior.

Update: Contrary to my previous belief, position: relative; z-index: 2 does work even when combined with float. Despite this, I remain interested in exploring improved alternatives. Ideally, this should work seamlessly without any extra tweaks.

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