I was trying to build something like this and what stopped me from finishing it was handling z-index of different stacking contexts, I couldn't make it work on

I was trying to build something like this and what stopped me from finishing it was handling z-index of different stacking contexts, I couldn't make it work on all cases, from the code it seems you put a very high z-index to the displayed section, which was my approach as well, but on different stacking contexts, I found out that sometimes no matter how high is your z-index, it will still be dependent on the parent stacking context, I guess I could have just released it (it was a jQuery plugin) as it was probably going to work for 99% of the use cases. Great work in any case!