Why Doesn\'t Z-index Work with Relatively Positioned Elements in Internet Explorer?

Overlapping Elements in Internet Explorer: The Z-index Conundrum

In the vast realm of web development, achieving seamless element positioning can sometimes be a puzzle, especially in the world of Internet Explorer. One common issue arises when attempting to place an element on top of another element that is positioned relatively. Despite utilizing the z-index property, the overlapped element stubbornly remains behind its positioned counterpart.

The Enigma Unveiled

The peculiar behavior in Internet Explorer stems from an inherent limitation of its rendering engine. When an element is positioned relatively, it establishes a new coordinate system that does not interfere with other static elements. As a result, the z-index property loses its effectiveness in this context.

A Quirky Solution: Trickery with CSS

Instead of battling against Internet Explorer's innate limitations, we can leverage its idiosyncrasies to achieve the desired effect. In this case, we employ a somewhat surprising yet effective solution: adding a background image to the overlapped element.

By assigning a background image, however minimal, we essentially force Internet Explorer to recognize the entity as a positioned element. Consequently, the z-index property regains its power, allowing us to control the element's layering.

Here's a CSS example that demonstrates this unexpected but functional workaround:

<code class="css">.myLinkCssClass {
    background          : url(#);
}</code>

By adding this style rule to the overlapped element, we create an invisible background image that fools Internet Explorer into treating it as positioned. As a result, the z-index property now takes precedence, allowing us to place the element over its relatively positioned counterpart.

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