How z-index actually works: a deep dive into stacking order - Jad Joubran

Description:
Why is it that z-index doesn’t work as expected sometimes? What are stacking contexts? How do you create one explicitly, and why would you do that?
This talk covers all these topics and newer ones, such as the Top Layer, and ends with recommendations you can follow to avoid dealing with the intricacies of stacking orders.
Bio:
Jad is an independent Web performance consultant and educator based in Amsterdam. He develops the platform and writes the curriculum for his interactive online courses such as learnjavascrip..., learnhtmlcss.o..., and others. For more information, visit jadjoubran.io