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T

eps1lon 7b062b39eb [Flight] Gated test for dropped transport of undefined object values (#26478 )

## Summary

With https://github.com/facebook/react/pull/26349 we now serialize
`undefined`. However, deserializing it on the client is currently
indistinguishable from the value missing entirely due to how
`JSON.parse` treats `undefined` return value of reviver functions.

This leads to inconsistent behavior of the `Object.hasOwn` or `in`
operator (used for narrowing in TypeScript). In TypeScript-speak, `{
prop: T | undefined}` will arrive as `{ prop?: T }`.

## How did you test this change?

- Added test that is expected to fail. Though ideally the implementation
of the component would not care whether it's used on the client or
server.

DiffTrain build for commit https://github.com/facebook/react/commit/f118b7cebf9c15d11c5973bfd40860b5f457df08.

2023-03-29 16:47:28 +00:00

compiled-rn/facebook-fbsource/xplat/js

[Flight] Gated test for dropped transport of undefined object values (#26478 )

2023-03-29 16:47:28 +00:00

README.md

fist commit

2023-02-20 16:27:42 +00:00

README.md

react-fbsource-import