Summary & Key Takeaways ​

• z-index behavior is governed by CSS stacking contexts.
• Understanding stacking contexts is crucial for element layering.
• Elements within a lower stacking context cannot appear above elements in a higher one.
• The article explains common pitfalls and how to avoid them.

Our Commentary ​

Stacking contexts. Oh, the memories of debugging z-index issues for hours. This is one of those fundamental CSS concepts that trips up everyone at some point. A good, clear explanation is always welcome. We need more articles that demystify these core web platform behaviors.