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Two bugs: - Type changes to a lazy's inner component (e.g., adding a `memo` comparison function) were missed by the refresh scan. - If a SimpleMemoComponent needs to be remounted, previously resolveRemountTypeForHotReloading would return the inner function and we would incorrectly recreate the fiber as a FunctionComponent. Instead, we can just use elementType consistently now that the beginWork functions consistently call resolveFamily on the wrapped components.
react-refresh
This package implements the wiring necessary to integrate Fast Refresh into bundlers. Fast Refresh is a feature that lets you edit React components in a running application without losing their state. It is similar to an old feature known as "hot reloading", but Fast Refresh is more reliable and officially supported by React.
This package is primarily aimed at developers of bundler plugins. If you’re working on one, here is a rough guide for Fast Refresh integration using this package.