Rewriting scrollback buffer for live project listing in terminal

[stuartpb]

Since the C9 console doesn't support \e[3J (and wiping scrollback entirely is kind of gauche anyway), I'm wondering if it's possible to do something like \e[100F (when there are 100 lines printed in the current list), rewrite them, then \e[0J away anything else (if there are fewer lines, ie. because a project was deleted).

There's also making use of saving/restoring cursor position, or using the "scroll up / down" sequences, but I'm pretty sure these are going to be restricted to what's within the terminal's display space (and I fear the same is probably true of Cursor Previous Line as well).

Is there an elegant pager library for Node that would let me virtualize this? I want something like less, but with auto-updating contents (which I can't do with actual Less).

[stuartpb]

I could probably throw something like a pager together reasonably simply with blessed - I imagine it's already got a widget for scrolling text.

The concern on my mind is, will that widget play nice with text that's already formatted with chalk? It'd suck if I have to go and rewrite the colorization logic with more complexity.