Not sure if whether it is intended, or a weird combination of my browser and extensions, but right now, if I click on the play/pause button on Youtube video pag

Not sure if whether it is intended, or a weird combination of my browser and extensions, but right now, if I click on the play/pause button on Youtube video page, it becomes focused (with a visual clue of a blue box), and then pressing space bar starts and stops (or stops and starts) the video in rapid succession because it is considered a keyboard command and a button activation at the same time. Actually, not quite at the same time, and that returns us to the old question of viability of reinventing GUIs in Javascript. I guess that even around 1990 window messages of some kind appearing with such a delay from a single action would mean the GUI is based on wrong principles, or the programmer doesn't know how to use it. It's even funnier to imagine what happens when you press and hold space. The button icon is mostly in in-between animation state from all the repeated presses, but the video starts or stops only on first press and on release. Guess how much fun people have programming window system inside a virtual machine inside a browser using window system inside real machine.