I, quite frankly, would love to see any of these changes rolled out for mobile view since currently there's no form of navigation. Implementation of any of these single concepts would be great.
I've tested the four design concepts on my mobile via your link and here's what I felt with each one of them:
- Jump to top button: quick and simple, but I felt it would be better if it appeared as soon as I scrolled down...not only after I scroll up. Till then, I wondered about its existence.
- Collapse and scroll: quick and simple, no complaints.
- Sticky headers: feels nice, but didn't find it practical when it came advanced navigation. True, I could say the same for the above two, but they were designed to be simple.
- Sticky headers become TOC: This solves my advanced navigation problem. Quick thing which occurred to me though: it being positioned top-left versus the App having it bottom-right made it cumbersome to move my thumb back-and-forth. People usually use their right hand finger to scroll, so I guess that's the reason the App has it positioned there. Also there's the long term issue of showing lower level <h2 sections like how they did.
Great work so far with all this!