Windows also advances by page when clicking in the gutter, BUT based on the handle size it seems like the example scrollbars are not demoing a large enough scroll area to show both behaviors.
It creates more and worse problems than it solves. People find it alright to write code that only works in a specific combination of language and package versions, and that is a shameful state of affairs.
I had dogshit slip that bordered insomnia for a while. I forced myself into a habit that triggered a sleep response.
For the past 4 or 5 years, I shower in the dark and walk to my room and pass out. I avoid "turning on" after that shower. No phones, no lights, no anything
Your body needs to know when its time to sleep. Texting, reading, and computer time in bed counters that.
I'm really sorry about that. I had full lab work done that indicated my pituitary was shot. I'm now getting hormone injections until we get my body functioning again. I'd recommend seeing your PCP; if they push a depression diagnosis on you, push back and ask to get full lab work. I was getting stuffed with SSRIs for more than 18 months until I couldn't take it any longer.