Why Your z-index Isn't Working: A Debugging Checklist for Stacking Contexts
z-index failing? A six-point checklist of the most common stacking context traps, each with a minimal repro and a one-line fix.
November 10, 2026Blog / CSS Tutorials
CSS Tutorials
2 articles
Why Your z-index Isn't Working: A Practical Guide to CSS Stacking Contexts
z-index: 9999 not working? Learn how stacking contexts trap your dropdowns and modals, which CSS properties create them, and how to debug them fast.
November 10, 2026