Is it not clear if the effect's clean up logic from a component making using of context is ran BEFORE re-rendering any other instance of the same component (on the same hierarchy level)

Runnable example: https://codesandbox.io/s/fast-sunset-8c0z2?file=/src/App.js

What is clear: It is clear a change in context will cause all consumers to re-render.

What is not clear: When using useEffect's clean up function - ( return () => { do some clean up } ) will that always be done for ALL component instance using the same context BEFORE re-rendering the other components of the same type ( ie multiple instances of MyComp )?

從 issue 中連結的可執行 CodeSandbox 範例開始，檢查 src/App.js，以重現 context 更新和 useEffect 清理行為。確認多個 MyComp 實例之間的順序，然後在 React 文件的適當位置記錄答案及任何相關注意事項。