command line drawing unicode boxes for a graph -

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i don't know correct keywords trying achieve.

i have rainbarf tmux afaik written in perl. wondering if there library, extension or functionality in node.js enable me draw bars ones rainbarf draws, in order write tmux monitors (wifi, gpu usage, etc).

edit

i think correct term unicode boxes have found a page documents them.

they seem unicode geometric shapes guessing correctly printing them screen (assuming terminal supports them) should achieve same result?

they appear small pixel-sized boxes constrained size of font.

example 1 example 2

rainbarf inspired on spark. there several implementations of spark in javascript (and other languages), check here: https://github.com/holman/spark/wiki/alternative-implementations


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