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Andrew Clark be67db46b6 Add optional initialValue argument to useDeferredValue (#27500 )

Adds a second argument to useDeferredValue called initialValue:

```js
const value = useDeferredValue(finalValue, initialValue);
```

During the initial render of a component, useDeferredValue will return
initialValue. Once that render finishes, it will spawn an additional
render to switch to finalValue.

This same sequence should occur whenever the hook is hidden and revealed
again, i.e. by a Suspense or Activity, though this part is not yet
implemented.

When initialValue is not provided, useDeferredValue has no effect during
initial render, but during an update, it will remain on the previous
value, then spawn an additional render to switch to the new value. (This
is the same behavior that exists today.)

During SSR, initialValue is always used, if provided.

This feature is currently behind an experimental flag. We plan to ship
it in a non-breaking release.

2023-10-10 16:39:02 -04:00

npm

Add Debug Tools Package for Introspection of Hooks (#14085 )

2018-11-05 10:02:59 -08:00

src

Add optional initialValue argument to useDeferredValue (#27500 )

2023-10-10 16:39:02 -04:00

index.js

[Codemod] Update copyright header to Meta (#25315 )

2022-10-18 11:19:24 -04:00

package.json

Remove object-assign polyfill (#23351 )