> PSA: position: sticky; exists now.

I joined this company that has a 10 year old Dojo application as their UI. Before I joined they had a guy come over once a week for some maintenance work. They spent several days trying to solve an issue where a bar with a 'save / close' action would show up at the bottom of a dialog, making users scroll down. This was a complaint that users had for literal years.

I added position: sticky and had to figure out how it worked, but the issue was resolved with about ten minutes of work. Not to pat my own shoulder too much, but that was pretty cool. Plus it works gracefully, in that if the browser doesn't support it yet, it falls back to (or, should) to the old behaviour.