Anything particular you want to know about it?

Assuming you're asking more along the lines of "how does it work internally?", these are my usual recommendations:

- My own extensive post "A (Mostly) Complete Guide to React Rendering Behavior": https://blog.isquaredsoftware.com/2020/05/blogged-answers-a-...

- Related, "When does React render your component?", which looks more at the source level checks: https://www.zhenghao.io/posts/react-rerender

- Dan Abramov's "A Complete Guide to useEffect" https://overreacted.io/a-complete-guide-to-useeffect/

- Shawn Swyx Wang's talk "Getting Closure on React Hooks" that builds a mini version of React hooks: https://www.swyx.io/hooks/

- Rodrigo Pomber's excellent "Didact: Build a Miniature React with Hooks": https://pomb.us/build-your-own-react

Is it possible to explain the big idea behind React in a single paragraph?

Write your code as components. The JS is nearby the corresponding HTML, and thus several teams can work on large web applications because it is so nicely componentized.

A great and succinct explanation, thanks.

Dan Abramov's blog is really good and this article in particular dives pretty deep into some React details.

https://overreacted.io/react-as-a-ui-runtime/