writing-react-effects

Guides writing React components that avoid unnecessary useEffect calls.

Effects are an escape hatch for synchronizing with external systems (network, DOM, third-party widgets). If there's no external system, you don't need an Effect.

If a value can be computed from current props/state, do not store it in state or update it in an effect. Derive it during render to avoid extra renders and state drift. Do not set state in effects solely in response to prop changes; prefer derived values or keyed resets instead.

編寫 React 元件而無需使用不必要的 useEffect。在建立/檢視 React 元件、重構效果或程式碼使用 useEffect 轉換資料或處理事件時使用。 來源：dust-tt/dust。