Possible conceptual pitfall when discussing accessing a state variable set in a previous render

Hi there!

In this section: https://react.dev/learn/you-might-not-need-an-effect#adjusting-some-state-when-a-prop-changes

It took me a while to understood that prevItems would not be changed until setItems was invoked on it. What tripped me there was that I thought that useState(X) always set items to X on every re-render. Once I understood that prevItems is set to X only when the state is initialized, everything is clear.

This might perhaps be a good place in the docs to clarify (either on a couple of sentences or on its own Pitfall section) that setState will only initialize a value, but not update it during a re-render.

I take this opportunity for congratulating the team on the new React docs. There are one of the best technical documentation pieces I've read in my entire career. 🚀

Đọc phần “Adjusting some state when a prop changes” được liên kết trong tài liệu React và xem xét phần giải thích về useState và setState giữa các lần render. Hoàn thành khi phần này phân biệt rõ việc khởi tạo state ban đầu với các lần cập nhật sau đó và giải quyết hiểu lầm đã được nêu.