Add React.unstable_getCacheForType

Author: gaearon

packages/react-fetch/src/ReactFetchBrowser.js

@@ -9,7 +9,7 @@
 
 import type {Wakeable} from 'shared/ReactTypes';
 
-import * as React from 'react';
+import {unstable_getCacheForType} from 'react';
 
 const Pending = 0;
 const Resolved = 1;
@@ -35,12 +35,8 @@ type Result = PendingResult | ResolvedResult | RejectedResult;
 // TODO: this is a browser-only version. Add a separate Node entry point.
 const nativeFetch = window.fetch;
 
-const ReactCurrentDispatcher =
-  React.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED
-    .ReactCurrentDispatcher;
-
 function getResultMap(): Map<string, Result> {
-  return ReactCurrentDispatcher.current.getCacheForType(createResultMap);
+  return unstable_getCacheForType(createResultMap);
 }
 
 function createResultMap(): Map<string, Result> {

packages/react-fetch/src/ReactFetchNode.js

@@ -11,7 +11,7 @@ import type {Wakeable} from 'shared/ReactTypes';
 
 import * as http from 'http';
 import * as https from 'https';
-import * as React from 'react';
+import {unstable_getCacheForType} from 'react';
 
 type FetchResponse = {|
   // Properties
@@ -74,12 +74,8 @@ type RejectedResult = {|
 
 type Result<V> = PendingResult | ResolvedResult<V> | RejectedResult;
 
-const ReactCurrentDispatcher =
-  React.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED
-    .ReactCurrentDispatcher;
-
 function getResultMap(): Map<string, Result<FetchResponse>> {
-  return ReactCurrentDispatcher.current.getCacheForType(createResultMap);
+  return unstable_getCacheForType(createResultMap);
 }
 
 function createResultMap(): Map<string, Result<FetchResponse>> {

packages/react/index.classic.fb.js

@@ -50,6 +50,7 @@ export {
   startTransition as unstable_startTransition,
   SuspenseList,
   SuspenseList as unstable_SuspenseList,
+  unstable_getCacheForType,
   // enableScopeAPI
   unstable_Scope,
   unstable_useOpaqueIdentifier,

packages/react/index.experimental.js

@@ -45,6 +45,7 @@ export {
   startTransition as unstable_startTransition,
   SuspenseList as unstable_SuspenseList,
   unstable_useOpaqueIdentifier,
+  unstable_getCacheForType,
   // enableDebugTracing
   unstable_DebugTracingMode,
 } from './src/React';

packages/react/index.js

@@ -82,4 +82,5 @@ export {
   unstable_createFundamental,
   unstable_Scope,
   unstable_useOpaqueIdentifier,
+  unstable_getCacheForType,
 } from './src/React';

packages/react/index.modern.fb.js

@@ -49,6 +49,7 @@ export {
   startTransition as unstable_startTransition,
   SuspenseList,
   SuspenseList as unstable_SuspenseList,
+  unstable_getCacheForType,
   // enableScopeAPI
   unstable_Scope,
   unstable_useOpaqueIdentifier,

packages/react/src/React.js

@@ -33,6 +33,7 @@ import {lazy} from './ReactLazy';
 import {forwardRef} from './ReactForwardRef';
 import {memo} from './ReactMemo';
 import {
+  getCacheForType,
   useCallback,
   useContext,
   useEffect,
@@ -110,6 +111,7 @@ export {
   useDeferredValue,
   REACT_SUSPENSE_LIST_TYPE as SuspenseList,
   REACT_LEGACY_HIDDEN_TYPE as unstable_LegacyHidden,
+  getCacheForType as unstable_getCacheForType,
   // enableFundamentalAPI
   createFundamental as unstable_createFundamental,
   // enableScopeAPI

packages/react/src/ReactHooks.js

@@ -36,6 +36,11 @@ function resolveDispatcher() {
   return dispatcher;
 }
 
+export function getCacheForType<T>(resourceType: () => T): T {
+  const dispatcher = resolveDispatcher();
+  return dispatcher.getCacheForType(resourceType);
+}
+
 export function useContext<T>(
   Context: ReactContext<T>,
   unstable_observedBits: number | boolean | void,