Navigation: Remember the reader's previous position when jumping around in text

[jmcglone]

As a reader, when I follow a link (inline, in the TOC, move nav. slider) to a new position in the text, I want to be able to get back to my previous position.

• If a reader follows a link and moves forward in the text, present a link to move back in the text to the previous location.
• If a reader follows a link and moves backward in the text, present a link to move forward in the text to the previous location.
• If a reader follows a link forward or back to their previous location, present a link to return to previous position.

[respinos]

If the reader is made aware of when the URL changes, could the browser back/forward buttons be sufficient? (The reader is updating history now but doesn't react when you use the back/forward buttons.)

[jmcglone]

I think that is a sensible and agile first step, but...

If using the back/forward buttons on the browser, it's important that the webpage/app doesn't completely re-load to support the use of case of Gabii (don't want to reinitialize the load of the WebGL object).

[respinos]

Supporting history is addressed in #135 --- some questions that arise:

• the browser history is ... monotonous, and none of the history API currently affects the title of items. I don't think we want to make the title even longer. Maybe the title + percentage?
• do you have an idea of visible controls? I will confess that when I try to imagine back/forward I hear someone on DAT saying stop that, the browser already has those buttons :-)