CSS Z-Index Guides
Z-index is all about discipline and having a plan — easier said than done!
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I was building a sidebar recently, and I encountered a bug where the content of the page was always on top of the mobile navbar no matter how high I raised the z-index of the sidebar. This took me a while to figure out and I'm writing this article hoping that someone out there won't waste a lot of time like I did trying to solve the bug.
Z-Index is an important property of CSS. The z-index property specifies the stack order of an element and its descendants. We use Z-index with absolute or relative positions. When elements overlap, z-order determines which one covers the other.
When was the last time you see the
z-indexCSS property being used like so:
My followers know that I no longer work as a frontend developer, however, I worked as one for nearly 15 years and I was self-taught. I was lucky to have a background in architecture, CAD and graphic and 3d design, so grasping the more mathematical (or in this case geometrical) aspects of putting together a layout, was not difficult for me. However, I see that for self-taught developers coming from completely unrelated backgrounds, the
z-indexis a tough one to grasp.
But the CSS counter() function returns a
<string>and the z-index property is looking for an
<integer>, so well.. It doesn't work.
If you have struggled with
z-indexyou are not alone.
Cuando los elementos se colocan fuera del flujo normal, pueden superponerse sobre otros elementos. La propiedad
z-indexespecifica el orden de apilamiento (Stacking Context) en el eje z, es decir, cual elemento debe ser colocado enfrente o detrás de otros.
This is kind of an advanced property in CSS and all you need to think about here is layers (as in photoshop) and them z index will be a piece of cake for you. All it is do you want a layer or element (let's say Image) to be overlapped or on top.
z-indexvalue to be specified for each component.
Happy CSS Z-Index coding!