It's a Rust library (comprised of a bunch of crates) that wraps a high-performance, high-accuracy syntax highlighter (called Tree-sitter) with vetted support for almost 100 programming/markup languages.

You can use it as a normal Rust library, or you can use the JavaScript/WASM wrapper to highlight source code on a web page.

See https://fasterthanli.me/articles/my-gift-to-the-rust-docs-te...

GitHub repo is a bit more helpful, but users or building of text editors that use tree-sitter.

Or... website text editors which historically have had imperfect syntax highlighting.

Notice the Zed sponsorship.

https://github.com/bearcove/arborium

I think this gives some context?:https://fasterthanli.me/articles/my-gift-to-the-rust-docs-te... TLDR: for rust doc highlighting stuff in document

Not for you then. You don't need to understand everything.