[colin_fraizer]

Related question: what precisely does <spacebar> do? (I realize it acts like a typical terminal pager like `more` or `less`; I mean, what is the mechanism?)

For example, look at https://nodejs.org/dist/latest-v12.x/docs/api/

It's visible content is all in a `div` with id `content`, which in turn contains two `div` s with ids `column2` and `column1`.

On a suitably small window, pressing <spacebar> causes the `div` `column1` to scroll, but what if I want to move the "focus" to `column2`?

[I realize this is somewhat tangential, but any pointers to a better place to find info about this would be greatly appreciated.]