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eslint-plugin-react-hooks: allow OptionalMemberExpression in deps (#18819)#18820

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gaearon merged 4 commits intofacebook:masterfrom
coolkev:master
May 5, 2020
Merged

eslint-plugin-react-hooks: allow OptionalMemberExpression in deps (#18819)#18820
gaearon merged 4 commits intofacebook:masterfrom
coolkev:master

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@coolkev
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@coolkev coolkev commented May 4, 2020

Summary

Fixes issue #18819

Test Plan

Added test case, and verified the fix works in my own VS Code instance.

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Details of bundled changes.

Comparing: 9751935...6398ed5

eslint-plugin-react-hooks

File Filesize Diff Gzip Diff Prev Size Current Size Prev Gzip Current Gzip ENV
eslint-plugin-react-hooks.development.js +0.4% +0.3% 81.74 KB 82.04 KB 18.69 KB 18.74 KB NODE_DEV
eslint-plugin-react-hooks.production.min.js 🔺+0.6% 🔺+0.2% 22.66 KB 22.8 KB 7.66 KB 7.67 KB NODE_PROD

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This pull request is automatically built and testable in CodeSandbox.

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sizebot commented May 4, 2020

Details of bundled changes.

Comparing: 9751935...6398ed5

eslint-plugin-react-hooks

File Filesize Diff Gzip Diff Prev Size Current Size Prev Gzip Current Gzip ENV
eslint-plugin-react-hooks.production.min.js 🔺+0.6% 🔺+0.2% 22.65 KB 22.79 KB 7.65 KB 7.66 KB NODE_PROD
eslint-plugin-react-hooks.development.js +0.4% +0.3% 81.73 KB 82.03 KB 18.68 KB 18.74 KB NODE_DEV

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Generated by 🚫 dangerJS against 6398ed5

@gaearon gaearon merged commit 7992ca1 into facebook:master May 5, 2020
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gaearon commented May 5, 2020

Thanks!

@AviVahl
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AviVahl commented May 14, 2020

EDIT: reported via #18926

@gaearon I believe this PR caused a regression.

consider:

const someContext = {
    users: Math.random() > 0.5 ? [{name: 'test'}] : undefined,
};

const filteredUsers = useMemo(() => {
    return someContext.users?.filter((u) => u.name.startsWith('a'));
}, [someContext.users]);

New version of hook now tells us the dep should be someContext.users?.filter, which is wrong for many common use cases (e.g. different class instances sharing the same method from prototype).

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