React, the framework, is separate from react-dom, the browser rendering library. Most people think of those two as one thing because they're the most popular combo.

But there are many different rendering libraries you can use with React, including Ink, which is designed for building CLI TUIs..

They used Ink: https://github.com/vadimdemedes/ink

I've used it myself. It has some rough edges in terms of rendering performance but it's nice overall.

Not a built-in React feature. The idea been around for quite some time, I came across it initially with https://github.com/vadimdemedes/ink back in 2022 sometime.

i had claude make a snake clone and fix all the flickering in like 20 minutes with the library mentioned lol