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gaearon
b41f0cd50d
Stacked on https://github.com/facebook/react/pull/30662.
Alternative to https://github.com/facebook/react/pull/30663 and
https://github.com/facebook/react/pull/30677.
During a Fast Refresh, we always want to evict the memo cache, same as
we do with normal `useMemo`. The mechanism used by `useMemo` and other
Hooks is this module-level variable:
https://github.com/facebook/react/blob/fca5d655d78917400a2722287351c20938166669/packages/react-reconciler/src/ReactFiberHooks.js#L304-L307
which has DEV-only behavior as if the dependencies are always different:
https://github.com/facebook/react/blob/fca5d655d78917400a2722287351c20938166669/packages/react-reconciler/src/ReactFiberHooks.js#L451-L460
The `useMemoCache` Hook doesn't use a dependency array but conceptually
I think we want the same behavior.
## Test Plan
The test passes.
---------
Co-authored-by: Lauren Tan <poteto@users.noreply.github.com>
DiffTrain build for [7e8a06cf4c](https://github.com/facebook/react/commit/7e8a06cf4c628be45171da52c1a8e97f9869b7ee)