How does Valtio causes re-renders without using useState ?

[afkcodes]

Hello @dai-shi I have been using valtio for a while, and just like lot of people do i did not look into how valtio actually does what it does, i was thinking valtio might be using setState internally to trigger re-renders. but when i had a look into the react implementation i could not find it. I'm curious about how does it triggers re-renders in react, without useState or useReducer.

Please correct me if I'm wrong above, i want to learn things. Thank you :)

[dai-shi]

It uses useSyncExternalStore provided in React 18, and use-sync-external-store has a shim for React 17.

See also: https://blog.axlight.com/posts/how-valtio-proxy-state-works-react-part/

[afkcodes]

Thank you for pointing it out, you have always helped in understanding and educating people. :)