The old version of prettier we were using didn't support the Flow syntax
to access properties in a type using `SomeType['prop']`. This updates
`prettier` and `rollup-plugin-prettier` to the latest versions.
I added the prettier config `arrowParens: "avoid"` to reduce the diff
size as the default has changed in Prettier 2.0. The largest amount of
changes comes from function expressions now having a space. This doesn't
have an option to preserve the old behavior, so we have to update this.
## Summary
The flag was first added in #16157 and was rolled out to employees in
D17430095. #25997 removed this flag because it wasn't dynamically set to
a value in www. The www side was mistakenly removed in D41851685 due to
deprecation of a TypedJSModule but we still want to keep this flag, so
let's add it back in + add a GK on the www side to match the previous
rollout.
See D42574435 for the dynamic value change in www
## How did you test this change?
```
yarn test
yarn test --prod
```
This renames Module References to Client References, since they are in
the server->client direction.
I also changed the Proxies exposed from the `node-register` loader to
provide better error messages. Ideally, some of this should be
replicated in the ESM loader too but neither are the source of truth.
We'll replicate this in the static form in the Next.js loaders. cc
@huozhi @shuding
- All references are now functions so that when you call them on the
server, we can yield a better error message.
- References that are themselves already referring to an export name are
now proxies that error when you dot into them.
- `use(...)` can now be used on a client reference to unwrap it server
side and then pass a reference to the awaited value.
I noticed this was an experiment concluded 16 months ago (#21679) that
this extra work is beneficial
to break up cycles leaking memory in product code.
These values are never imported into `ReactFeatureFlags.www.js`, so
they're unused:
- `allowConcurrentByDefault`
- `consoleManagedByDevToolsDuringStrictMode`
These values are never set in the WWW module
(https://fburl.com/code/dsb2ohv8), so they're always `undefined` on www:
- `createRootStrictEffectsByDefault`
- `enableClientRenderFallbackOnTextMismatch`
This enables the "exact_empty_objects" setting for Flow which makes
empty objects exact instead of building up the type as properties are
added in code below. This is in preparation to Flow 191 which makes this
the default and removes the config.
More about the change in the Flow blog
[here](https://medium.com/flow-type/improved-handling-of-the-empty-object-in-flow-ead91887e40c).
This setting is an incremental path to the next Flow version enforcing
type annotations on most functions (except some inline callbacks).
Used
```
node_modules/.bin/flow codemod annotate-functions-and-classes --write .
```
to add a majority of the types with some hand cleanup when for large
inferred objects that should just be `Fiber` or weird constructs
including `any`.
Suppressed the remaining issues.
Builds on #25918
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## Summary
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This is the other approach for unifying default and sync lane
https://github.com/facebook/react/pull/25524.
The approach in that PR is to merge default and continuous lane into the
sync lane, and use a new field to track the priority. But there are a
couple places that field will be needed, and it is difficult to
correctly reset the field when there is no sync lane.
In this PR we take the other approach that doesn't remove any lane, but
batch them to get the behavior we want.
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yarn test
Co-authored-by: Andrew Clark <[email protected]>
Flow introduced a new syntax to annotated the context type of a
function, this tries to update the rest and add 1 example usage.
- 5e588e7c8b already added the changes
required for eslint.
- Jest transform is updated to use the recommended `hermes-parser` which
can parse current and Flow syntax and will be updated in the future.
- Rollup uses a new plugin to strip the flow types. This isn't ideal as
the npm module is deprecated in favor of using `hermes-parser`, but I
couldn't figure out how to integrate that with Rollup.
We originally had grand plans for using this Event concept for more but
now it's only meant to be used in combination with effects.
It's an Event in the FRP terms, that is triggered from an Effect.
Technically it can also be from another function that itself is
triggered from an existing side-effect but that's kind of an advanced
case.
The canonical case is an effect that triggers an event:
```js
const onHappened = useEffectEvent(() => ...);
useEffect(() => {
onHappened();
}, []);
```
This isn't the right way to do this, but internally we have some
restrictions so we need to add an indirection. Let's land this now so we
can catch up our sync and then fix forward from there.
Co-authored-by: Jan Kassens <[email protected]>
We've heard from multiple contributors that the Reconciler forking
mechanism was confusing and/or annoying to deal with. Since it's
currently unused and there's no immediate plans to start using it again,
this removes the forking.
Fully removing the fork is split into 2 steps to preserve file history:
**This PR**
- remove `enableNewReconciler` feature flag.
- remove `unstable_isNewReconciler` export
- remove eslint rules for cross fork imports
- remove `*.new.js` files and update imports
- merge non-suffixed files into `*.old` files where both exist
(sometimes types were defined there)
**#25775**
- rename `*.old` files
This improves the error message a bit and ensures that we recommend
putting the key first, not last, which ensures that the faster
`jsx-runtime` is used.
This only affects the modern "automatic" JSX transform.
* Add fetch instrumentation in cached contexts
* Avoid unhandled rejection errors for Promises that we intentionally ignore
In the final passes, we ignore the newly generated Promises and use
the previous ones. This ensures that if those generate errors, that we
intentionally ignore those.
* Add extra fetch properties if there were any
* Facebook -> Meta in copyright
rg --files | xargs sed -i 's#Copyright (c) Facebook, Inc. and its affiliates.#Copyright (c) Meta Platforms, Inc. and affiliates.#g'
* Manual tweaks
* Add feature flag for external Fizz runtime
Only enabled for www for now
* Add option to load Fizz runtime from external file
When unstable_externalRuntimeSrc is provided, React will inject a script
tag that points to the provided URL.
Then, instead of emitting inline scripts, the Fizz stream will emit
HTML nodes with data attributes that encode the instructions. The
external runtime will detect these with a mutation observer and
translate them into runtime commands. This part isn't implemented in
this PR, though — all this does is set up the option to use
an external runtime, and inject the script tag.
The external runtime is injected at the same time as bootstrap scripts.
- method unbinding is no longer supported in Flow for soundness, this added a bunch of suppressions
- Flow now prevents objects to be supertypes of interfaces/classes
ghstack-source-id: d7749cbad8
Pull Request resolved: https://github.com/facebook/react/pull/25412
* Expose ref to Offscreen if mode is manual
* Prepend private fields on OffscreenInstance with underscore
* Schedule Ref effect unconditionally on Offscreen
* Make sure Offscreen's ref is detached when unmounted
* Make sure ref is mounted/unmounted in all scenarious
* Nit: pendingProps -> memoizedProps
Co-authored-by: Andrew Clark <[email protected]>
