[Suggestion]: Runtime Development Warning for Stale Closures in useEffect, useCallback, and useMemo
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- 主要语言
- JavaScript
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- 1 天 11 小时
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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 When a value is omitted from the dependencies array, the hook's closure continues to reference an outdated value from a previous render—a "stale closure".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Does not warn about actual runtime behavior—it cannot tell if a stale closure actually read an outdated value during a particular render.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.
贡献指南
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- 先读完整个 Issue,再读项目的贡献指南。
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- Fork 仓库,在一个分支上完成修改。
- 提交 Pull Request,并在描述里引用这个 Issue 编号。
调研方向
从 useEffect、useCallback 和 useMemo 的行为描述开始,并将其与 eslint-plugin-react-hooks 的 exhaustive-deps 规则进行比较。定义具体的运行时警告范围,以及针对省略的依赖项、动态值和自定义 Hook 的验收案例;当警告行为和验证方法得到明确规定时,该 issue 即完成。
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评估
- 技术栈
- eslint, javascript, react
- 领域
- developer-experience, frontend, tooling
- Issue 类型
- 功能
- 难度
- 5/5
- 预计耗时
- 一周以上
- 活跃度
- 冷清
- 描述清晰度
- 需要澄清
- 新手友好度
- 35/100