[useFormState] Allow sync actions (facebook#27571)

Updates useFormState to allow a sync function to be passed as an action.

A form action is almost always async, because it needs to talk to the
server. But since we support client-side actions, too, there's no reason
we can't allow sync actions, too.

I originally chose not to allow them to keep the implementation simpler
but it's not really that much more complicated because we already
support this for actions passed to startTransition. So now it's
consistent: anywhere an action is accepted, a sync client function is a
valid input.

fixtures/flight/config/modules.js

@@ -108,9 +108,11 @@ function getModules() {
   // TypeScript project and set up the config
   // based on tsconfig.json
   if (hasTsConfig) {
-    const ts = require(resolve.sync('typescript', {
-      basedir: paths.appNodeModules,
-    }));
+    const ts = require(
+      resolve.sync('typescript', {
+        basedir: paths.appNodeModules,
+      })
+    );
     config = ts.readConfigFile(paths.appTsConfig, ts.sys.readFile).config;
     // Otherwise we'll check if there is jsconfig.json
     // for non TS projects.

package.json

@@ -81,14 +81,14 @@
     "minimist": "^1.2.3",
     "mkdirp": "^0.5.1",
     "ncp": "^2.0.0",
-    "prettier": "2.8.3",
+    "prettier": "3.0.3",
     "pretty-format": "^29.4.1",
     "prop-types": "^15.6.2",
     "random-seed": "^0.3.0",
     "react-lifecycles-compat": "^3.0.4",
     "rimraf": "^3.0.0",
     "rollup": "^3.17.1",
-    "rollup-plugin-prettier": "^3.0.0",
+    "rollup-plugin-prettier": "^4.1.1",
     "rollup-plugin-strip-banner": "^3.0.0",
     "semver": "^7.1.1",
     "signedsource": "^2.0.0",

packages/react-client/src/ReactFlightClient.js

@@ -572,11 +572,11 @@ function createServerReferenceProxy<A: Iterable<any>, T>(
     }
     // Since this is a fake Promise whose .then doesn't chain, we have to wrap it.
     // TODO: Remove the wrapper once that's fixed.
-    return ((Promise.resolve(p): any): Promise<Array<any>>).then(function (
-      bound,
-    ) {
-      return callServer(metaData.id, bound.concat(args));
-    });
+    return ((Promise.resolve(p): any): Promise<Array<any>>).then(
+      function (bound) {
+        return callServer(metaData.id, bound.concat(args));
+      },
+    );
   };
   registerServerReference(proxy, metaData);
   return proxy;

packages/react-devtools-shared/src/__tests__/profilerChangeDescriptions-test.js

@@ -40,12 +40,11 @@ describe('Profiler change descriptions', () => {
     }
 
     const MemoizedChild = React.memo(Child, areEqual);
-    const ForwardRefChild = React.forwardRef(function RefForwardingComponent(
-      props,
-      ref,
-    ) {
-      return <Child />;
-    });
+    const ForwardRefChild = React.forwardRef(
+      function RefForwardingComponent(props, ref) {
+        return <Child />;
+      },
+    );
 
     let forceUpdate = null;
 

packages/react-devtools-shared/src/devtools/ProfilingCache.js

@@ -33,20 +33,20 @@ export default class ProfilingCache {
     this._profilerStore = profilerStore;
   }
 
-  getCommitTree: ({
-    commitIndex: number,
-    rootID: number,
-  }) => CommitTree = ({commitIndex, rootID}) =>
+  getCommitTree: ({commitIndex: number, rootID: number}) => CommitTree = ({
+    commitIndex,
+    rootID,
+  }) =>
     getCommitTree({
       commitIndex,
       profilerStore: this._profilerStore,
       rootID,
     });
 
-  getFiberCommits: ({
-    fiberID: number,
-    rootID: number,
-  }) => Array<number> = ({fiberID, rootID}) => {
+  getFiberCommits: ({fiberID: number, rootID: number}) => Array<number> = ({
+    fiberID,
+    rootID,
+  }) => {
     const cachedFiberCommits = this._fiberCommits.get(fiberID);
     if (cachedFiberCommits != null) {
       return cachedFiberCommits;

packages/react-devtools-shared/src/hooks/__tests__/parseHookNames-test.js

@@ -70,9 +70,8 @@ describe('parseHookNames', () => {
       const hooksList = flattenHooksList(hooksTree);
 
       // Runs in the UI thread so it can share Network cache:
-      const locationKeyToHookSourceAndMetadata = await loadSourceAndMetadata(
-        hooksList,
-      );
+      const locationKeyToHookSourceAndMetadata =
+        await loadSourceAndMetadata(hooksList);
 
       // Runs in a Worker because it's CPU intensive:
       return parseSourceAndMetadata(

packages/react-dom-bindings/src/server/ReactDOMServerExternalRuntime.js

@@ -26,7 +26,7 @@ if (document.body != null) {
     installFizzInstrObserver(document.body);
   }
   // $FlowFixMe[incompatible-cast]
-  handleExistingNodes((document.body /*: HTMLElement */));
+  handleExistingNodes((document.body: HTMLElement));
 } else {
   // Document must be loading -- body may not exist yet if the fizz external
   // runtime is sent in <head> (e.g. as a preinit resource)
@@ -38,7 +38,7 @@ if (document.body != null) {
         installFizzInstrObserver(document.body);
       }
       // $FlowFixMe[incompatible-cast]
-      handleExistingNodes((document.body /*: HTMLElement */));
+      handleExistingNodes((document.body: HTMLElement));
 
       // We can call disconnect without takeRecord here,
       // since we only expect a single document.body
@@ -49,15 +49,15 @@ if (document.body != null) {
   domBodyObserver.observe(document.documentElement, {childList: true});
 }
 
-function handleExistingNodes(target /*: HTMLElement */) {
+function handleExistingNodes(target: HTMLElement) {
   const existingNodes = target.querySelectorAll('template');
   for (let i = 0; i < existingNodes.length; i++) {
     handleNode(existingNodes[i]);
   }
 }
 
-function installFizzInstrObserver(target /*: Node */) {
-  const handleMutations = (mutations /*: Array<MutationRecord> */) => {
+function installFizzInstrObserver(target: Node) {
+  const handleMutations = (mutations: Array<MutationRecord>) => {
     for (let i = 0; i < mutations.length; i++) {
       const addedNodes = mutations[i].addedNodes;
       for (let j = 0; j < addedNodes.length; j++) {
@@ -80,13 +80,13 @@ function installFizzInstrObserver(target /*: Node */) {
   });
 }
 
-function handleNode(node_ /*: Node */) {
+function handleNode(node_: Node) {
   // $FlowFixMe[incompatible-cast]
-  if (node_.nodeType !== 1 || !(node_ /*: HTMLElement */).dataset) {
+  if (node_.nodeType !== 1 || !(node_: HTMLElement).dataset) {
     return;
   }
   // $FlowFixMe[incompatible-cast]
-  const node = (node_ /*: HTMLElement */);
+  const node = (node_: HTMLElement);
   const dataset = node.dataset;
   if (dataset['rxi'] != null) {
     clientRenderBoundary(

packages/react-dom-bindings/src/shared/ReactDOMFormActions.js

@@ -8,6 +8,7 @@
  */
 
 import type {Dispatcher} from 'react-reconciler/src/ReactInternalTypes';
+import type {Awaited} from 'shared/ReactTypes';
 
 import {enableAsyncActions, enableFormActions} from 'shared/ReactFeatureFlags';
 import ReactSharedInternals from 'shared/ReactSharedInternals';
@@ -76,10 +77,10 @@ export function useFormStatus(): FormStatus {
 }
 
 export function useFormState<S, P>(
-  action: (S, P) => Promise<S>,
-  initialState: S,
+  action: (Awaited<S>, P) => S,
+  initialState: Awaited<S>,
   permalink?: string,
-): [S, (P) => void] {
+): [Awaited<S>, (P) => void] {
   if (!(enableFormActions && enableAsyncActions)) {
     throw new Error('Not implemented.');
   } else {

packages/react-dom/index.experimental.js

@@ -31,6 +31,7 @@ export {
   version,
 } from './src/client/ReactDOM';
 
+import type {Awaited} from 'shared/ReactTypes';
 import type {FormStatus} from 'react-dom-bindings/src/shared/ReactDOMFormActions';
 import {useFormStatus, useFormState} from './src/client/ReactDOM';
 
@@ -45,10 +46,10 @@ export function experimental_useFormStatus(): FormStatus {
 }
 
 export function experimental_useFormState<S, P>(
-  action: (S, P) => Promise<S>,
-  initialState: S,
+  action: (Awaited<S>, P) => S,
+  initialState: Awaited<S>,
   permalink?: string,
-): [S, (P) => void] {
+): [Awaited<S>, (P) => void] {
   if (__DEV__) {
     console.error(
       'useFormState is now in canary. Remove the experimental_ prefix. ' +

packages/react-dom/server-rendering-stub.js

@@ -34,6 +34,7 @@ import {
   useFormStatus,
   useFormState,
 } from './src/server/ReactDOMServerRenderingStub';
+import type {Awaited} from 'shared/ReactTypes';
 
 export function experimental_useFormStatus(): FormStatus {
   if (__DEV__) {
@@ -46,10 +47,10 @@ export function experimental_useFormStatus(): FormStatus {
 }
 
 export function experimental_useFormState<S, P>(
-  action: (S, P) => Promise<S>,
-  initialState: S,
+  action: (Awaited<S>, P) => S,
+  initialState: Awaited<S>,
   permalink?: string,
-): [S, (P) => void] {
+): [Awaited<S>, (P) => void] {
   if (__DEV__) {
     console.error(
       'useFormState is now in canary. Remove the experimental_ prefix. ' +