[Suggestion]: Runtime Development Warning for Stale Closures in useEffect, useCallback, and useMemo
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
Summary
Make the waring for Stale Closures in useEffect, useCallback, and useMemo more detailed
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Details
React hooks that accept dependency arrays (useEffect, useCallback, useMemo) rely on developers to manually list all reactive values that the hook's closure depends on. When a value is omitted from the dependencies array, the hook's closure continues to reference an outdated value from a previous render—a "stale closure". This leads to subtle, difficult‑to‑debug bugs such as:
Event handlers or effects reading old state/props.
Effects that should run on state changes never re‑executing.
Callbacks that always operate on stale data.
Currently, the eslint-plugin-react-hooks provides a static analysis rule (exhaustive‑deps) that warns about missing dependencies. However, this rule:
Cannot catch all cases (e.g., dynamic values, complex control flow, or custom hooks that obscure dependencies).
Only runs at lint time; developers may ignore or disable the warning.
Does not warn about actual runtime behavior—it cannot tell if a stale closure actually read an outdated value during a particular render.
As a result, developers often spend hours chasing down stale‑closure bugs, especially in larger codebases or when integrating third‑party hooks.
貢獻指南
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- 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
從 useEffect、useCallback 和 useMemo 的行為描述開始,並將其與 eslint-plugin-react-hooks 的 exhaustive-deps 規則進行比較。定義具體的執行期警告範圍,以及針對省略的相依性、動態值和自訂 Hook 的驗收案例;當警告行為和驗證方法獲得明確規範時,該 issue 即完成。
由索引模型根據 Issue 內容生成。
評估
- 技術堆疊
- eslint, javascript, react
- 領域
- developer-experience, frontend, tooling
- Issue 類型
- 功能
- 難度
- 5/5
- 預估耗時
- 一週以上
- 活躍度
- 冷清
- 描述清晰度
- 需要釐清
- 新手友好度
- 35/100