make our own promiseWithResolvers

reduxjs · Feb 24, 2025 · 16a6b3b · 16a6b3b
1 parent ee00174
commit 16a6b3b
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Showing 2 changed files with 17 additions and 3 deletions.
diff --git a/packages/toolkit/src/tests/createAsyncThunk.test.ts b/packages/toolkit/src/tests/createAsyncThunk.test.ts
@@ -1,5 +1,5 @@
 import { noop } from '@internal/listenerMiddleware/utils'
-import { delay } from '@internal/utils'
+import { delay, promiseWithResolvers } from '@internal/utils'
 import type { CreateAsyncThunkFunction, UnknownAction } from '@reduxjs/toolkit'
 import {
   configureStore,
@@ -1014,7 +1014,7 @@ describe('dispatch config', () => {
   test('accepts external signal', async () => {
     const asyncThunk = createAsyncThunk('test', async (_: void, { signal }) => {
       signal.throwIfAborted()
-      const { promise, reject } = Promise.withResolvers()
+      const { promise, reject } = promiseWithResolvers<never>()
       signal.addEventListener('abort', () => reject(signal.reason))
       return promise
     })
@@ -1031,7 +1031,7 @@ describe('dispatch config', () => {
   test('handles already aborted external signal', async () => {
     const asyncThunk = createAsyncThunk('test', async (_: void, { signal }) => {
       signal.throwIfAborted()
-      const { promise, reject } = Promise.withResolvers()
+      const { promise, reject } = promiseWithResolvers<never>()
       signal.addEventListener('abort', () => reject(signal.reason))
       return promise
     })

diff --git a/packages/toolkit/src/utils.ts b/packages/toolkit/src/utils.ts
@@ -109,3 +109,17 @@ export function getOrInsertComputed<K extends object, V>(
 
   return map.set(key, compute(key)).get(key) as V
 }
+
+export function promiseWithResolvers<T>(): {
+  promise: Promise<T>
+  resolve: (value: T | PromiseLike<T>) => void
+  reject: (reason?: any) => void
+} {
+  let resolve: any
+  let reject: any
+  const promise = new Promise<T>((res, rej) => {
+    resolve = res
+    reject = rej
+  })
+  return { promise, resolve, reject }
+}