Termion VS tart

There are plenty of terminal UI libraries that are actually nice to work with. For Python, there's Textual and PyTermGUI. For Rust, there's ratatui and Cursive (or, if you want something a bit lower level, crosster or termion). For Go, there's bubbletea.

That being said, termion has already handle this for us (an example).

Termion crate (https://crates.io/crates/termion), and very careful observation of a rust error. Hope your friend finds it useful ;)

If you just need basic printing and limited input then I'd choose either crossterm or termion. If you want a full tui, then tui-rs is really good.

Termion - Rust || Termion - crates.io

So far, I took a quick search in tui-rs repo and see these examples. All of them are use termion.

Sound capture with cpal, analysis with rustfft, terminal ui with tui and termion, and graphical with macroquad and egui

They all compiled to WebAssembly without issues. I just needed to provide a telnet backend for TUI, but I could reuse most of the code from the termion crate (sadly it has no Windows support for now).

Here's another cool one: tart, for making things like ASCII diagrams for code comments (or hell, even fully fledged terminal art)

I wanted to see how Monodraw compared to my preferred terminal art editor (https://github.com/jtdaugherty/tart), but my version of macOS which is only a couple years old is apparently not supported anymore. Tart runs in the terminal, so it works pretty much everywhere. I think it deserves more users, so if you're not on macOS, maybe check it out.

better solution is tart

Source: Building the only piece of Haskell software I use, tart.