Rework uSES init to not rely on module initialization order

The previous attempt worked fine in local dev + tests, but failed
when built and run in a real app.

src/alternate-renderers.ts

@@ -6,9 +6,11 @@
 import { useSyncExternalStore } from 'use-sync-external-store/shim'
 import { useSyncExternalStoreWithSelector } from 'use-sync-external-store/shim/with-selector'
 
-import { setSyncFunctions } from './utils/useSyncExternalStore'
+import { initializeUseSelector } from './hooks/useSelector'
+import { initializeConnect } from './components/connect'
 
-setSyncFunctions(useSyncExternalStore, useSyncExternalStoreWithSelector)
+initializeUseSelector(useSyncExternalStoreWithSelector)
+initializeConnect(useSyncExternalStore)
 
 import { getBatch } from './utils/batch'
 

src/compat.ts

@@ -5,11 +5,14 @@
 import { useSyncExternalStore } from 'use-sync-external-store/shim'
 import { useSyncExternalStoreWithSelector } from 'use-sync-external-store/shim/with-selector'
 
-import { setSyncFunctions } from './utils/useSyncExternalStore'
 import { unstable_batchedUpdates as batch } from './utils/reactBatchedUpdates'
 import { setBatch } from './utils/batch'
 
-setSyncFunctions(useSyncExternalStore, useSyncExternalStoreWithSelector)
+import { initializeUseSelector } from './hooks/useSelector'
+import { initializeConnect } from './components/connect'
+
+initializeUseSelector(useSyncExternalStoreWithSelector)
+initializeConnect(useSyncExternalStore)
 
 // Enable batched updates in our subscriptions for use
 // with standard React renderers (ReactDOM, React Native)

src/components/connect.tsx

@@ -28,7 +28,6 @@ import defaultMergePropsFactories from '../connect/mergeProps'
 
 import { createSubscription, Subscription } from '../utils/Subscription'
 import { useIsomorphicLayoutEffect } from '../utils/useIsomorphicLayoutEffect'
-import { getSyncFunctions } from '../utils/useSyncExternalStore'
 import shallowEqual from '../utils/shallowEqual'
 
 import {
@@ -37,7 +36,13 @@ import {
   ReactReduxContextInstance,
 } from './Context'
 
-const [useSyncExternalStore] = getSyncFunctions()
+import type { uSES } from '../utils/useSyncExternalStore'
+import { notInitialized } from '../utils/useSyncExternalStore'
+
+let useSyncExternalStore = notInitialized as uSES
+export const initializeConnect = (fn: uSES) => {
+  useSyncExternalStore = fn
+}
 
 // Define some constant arrays just to avoid re-creating these
 const EMPTY_ARRAY: [unknown, number] = [null, 0]

src/hooks/useSelector.ts

@@ -2,10 +2,14 @@ import { useContext, useDebugValue } from 'react'
 
 import { useReduxContext as useDefaultReduxContext } from './useReduxContext'
 import { ReactReduxContext } from '../components/Context'
-import { getSyncFunctions } from '../utils/useSyncExternalStore'
 import type { DefaultRootState, EqualityFn } from '../types'
+import type { uSESWS } from '../utils/useSyncExternalStore'
+import { notInitialized } from '../utils/useSyncExternalStore'
 
-const [, useSyncExternalStoreWithSelector] = getSyncFunctions()
+let useSyncExternalStoreWithSelector = notInitialized as uSESWS
+export const initializeUseSelector = (fn: uSESWS) => {
+  useSyncExternalStoreWithSelector = fn
+}
 
 const refEquality: EqualityFn<any> = (a, b) => a === b
 

src/index.ts

@@ -7,11 +7,14 @@
 import { useSyncExternalStore } from 'react'
 import { useSyncExternalStoreWithSelector } from 'use-sync-external-store/with-selector'
 
-import { setSyncFunctions } from './utils/useSyncExternalStore'
 import { unstable_batchedUpdates as batch } from './utils/reactBatchedUpdates'
 import { setBatch } from './utils/batch'
 
-setSyncFunctions(useSyncExternalStore, useSyncExternalStoreWithSelector)
+import { initializeUseSelector } from './hooks/useSelector'
+import { initializeConnect } from './components/connect'
+
+initializeUseSelector(useSyncExternalStoreWithSelector)
+initializeConnect(useSyncExternalStore)
 
 // Enable batched updates in our subscriptions for use
 // with standard React renderers (ReactDOM, React Native)

src/utils/useSyncExternalStore.ts

@@ -1,21 +1,9 @@
 import type { useSyncExternalStore } from 'use-sync-external-store'
 import type { useSyncExternalStoreWithSelector } from 'use-sync-external-store/with-selector'
 
-const notInitialized = () => {
-  throw new Error('Not initialize!')
+export const notInitialized = () => {
+  throw new Error('uSES not initialized!')
 }
 
-let uSES: typeof useSyncExternalStore = notInitialized
-let uSESWS: typeof useSyncExternalStoreWithSelector = notInitialized
-
-// Allow injecting the actual functions from the entry points
-export const setSyncFunctions = (
-  sync: typeof useSyncExternalStore,
-  withSelector: typeof useSyncExternalStoreWithSelector
-) => {
-  uSES = sync
-  uSESWS = withSelector
-}
-
-// Supply a getter just to skip dealing with ESM bindings
-export const getSyncFunctions = () => [uSES, uSESWS] as const
+export type uSES = typeof useSyncExternalStore
+export type uSESWS = typeof useSyncExternalStoreWithSelector