Does `dispatch` function identity change when passed in context? [Re: eslint-plugin-react-hooks]
還沒有人認領這個 Issue。
- 主要語言
- JavaScript
- 星號
- 11.8k
- 分支
- 7.9k
- 平均合併
- 1 天 11 小時
- 30 天內合併 PR
- 11
描述
Issue:
-
The docs for useReducer suggests omitting
dispatchfrom the dependencies list ofuseEffectanduseReducer.Note
React guarantees thatdispatchfunction identity is stable and won't change on re-renders. This is why it's safe to omit from theuseEffectoruseCallbackdependency list. -
The docs also recommend passing
dispatchfunction fromuseReducervia context to avoid passing callbacks down a large component tree: -
eslint-plugin-react-hooks warns if
dispatch(that's been passed from context) is not added touseEffectdependencies list.This conflicts with the first point above (docs suggesting omitting
dispatchfrom the dependencies list)React Hook useCallback has a missing dependency: 'dispatch'. Either include it or remove the dependency array.
Is this:
- Expected behavior after passing
dispatchthrough context - so the docs should have a small amendment for this scenario? - Or a bug in
eslint-plugin-react-hooks?
Thanks for the help!!
Working Sample:
- Example Sandbox: https://codesandbox.io/s/vnq10rmwjy
貢獻指南
從這裡開始
- 先讀完整個 Issue,再讀專案的貢獻指南。
- 在 Issue 下留言說明你要接手 —— 這能避免兩個人做同樣的事。
- Fork 儲存庫,在一個分支上完成修改。
- 送出 Pull Request,並在描述裡引用這個 Issue 編號。
研究方向
先閱讀連結的 useReducer 和 Hooks FAQ 文件,然後在 CodeSandbox 中重現該警告,並將其與 eslint-plugin-react-hooks 的行為進行比較。完成的標準是確定文件是否需要釐清,或外掛行為是否需要另外修正,並記錄相關結論。
由索引模型根據 Issue 內容生成。
評估
- 技術堆疊
- eslint, javascript, react
- 領域
- documentation, tooling
- Issue 類型
- 文件
- 難度
- 4/5
- 預估耗時
- 3-5 天
- 活躍度
- 停滯
- 描述清晰度
- 需要釐清
- 新手友好度
- 25/100