[Suggestion]: Runtime Development Warning for Stale Closures in useEffect, useCallback, and useMemo

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评估

难度
5/5
预计耗时
一周以上
新手友好度
35/100
Issue 类型
功能
描述清晰度
需要澄清
活跃度
冷清
技术栈
eslint, javascript, react
领域
developer-experience, frontend, tooling

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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描述

type: documentation
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 When a value is omitted from the dependencies array, the hook's closure continues to reference an outdated value from a previous render—a "stale closure".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Does not warn about actual runtime behavior—it cannot tell if a stale closure actually read an outdated value during a particular render.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.

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JavaScript
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