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Bug: [eslint-plugin-react-hooks] exhaustive-deps false positive on "unnecessary" dependency if its a React component

facebook/react#18051·250633·JavaScript·811 天未动·11 条评论·上游最近活跃 ·池内状态:可认领
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上游 issue 正文

## Steps to reproduce 1. create a memoized value using `useMemo` 2. a React component is used in the creation of this value, in a JSX expression 3. specify the React component in the dependency array Link to code example: https://github.com/zeorin/eslint-plugin-react-hooks-repro ## The current behavior ``` React Hook useMemo has an unnecessary dependency: 'Component'. Either exclude it or remove the dependency array react-hooks/exhaustive-deps ``` ## The expected behavior No lint errors. ## More details A simple repro (taken from the link above) is: ```javascript.jsx function Foo({ component: Component }) { const memoized = useMemo(() => ({ render: () => <Component /> }), [Component]); return memoized.render(); } ``` ## Workarounds If one changes the component to lowercase, the lint error goes away. It does also mean that we need to change the way we render the component: ```javascript.jsx function Foo({ component }) { const memoized = useMemo(() => ({ render: component }), [component]); return memoized.render(); } ``` Alternatively we can decide not to use JSX, in which case the lint rule functions correctly, too: ```javascript.jsx function Foo({ component: Component }) { const memoized = useMemo(() => ({ render: () => React.createElement(Component) }), [Component]); return memoized.render(); } ``` ## Impact Currently it is hard to use props that are components in a JSX expression if one is using the `exhaustive-deps` rule. This is also compounded by the fact that this rule has a ESLint fix that removes the dependency, thus changing the behaviour of the code and leading to bugs. See https://github.com/facebook/react/issues/16313 for that bug report.
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