🤖 Merge PR DefinitelyTyped#64020 fix(react-native-background-download…

…er): correct types for DownloadTaskState by @fivecar

It turns out that react-native-background-downloader doesn't actually export this type. Things may seem fine with doing things like `DownloadTaskState.DOWNLOADING` in your code, until you use that in a package that you also then publish yourself. At that point, you'll find the transpiled JS in your package refers to things like react_native_background_downloader_1.DownloadTaskState.DOWNLOADING, which definitely does not exist and will throw at runtime.

types/react-native-background-downloader/index.d.ts

@@ -28,13 +28,7 @@ export type BeginHandler = ({ expectedBytes, headers }: BeginHandlerObject) => a
 export type ProgressHandler = (percent: number, bytesWritten: number, totalBytes: number) => any;
 export type DoneHandler = () => any;
 export type ErrorHandler = (error: any, errorCode: any) => any;
-export enum DownloadTaskState {
-  DOWNLOADING = 'DOWNLOADING',
-  PAUSED = 'PAUSED',
-  DONE = 'DONE',
-  FAILED = 'FAILED',
-  STOPPED = 'STOPPED',
-}
+export type DownloadTaskState = 'DOWNLOADING' | 'PAUSED' | 'DONE' | 'FAILED' | 'STOPPED';
 
 export interface DownloadTask {
     constructor: (taskInfo: TaskInfo) => DownloadTask;

types/react-native-background-downloader/react-native-background-downloader-tests.tsx

@@ -1,8 +1,4 @@
-import RNBackgroundDownloader, {
-    completeHandler,
-    DownloadTask,
-    DownloadTaskState,
-} from 'react-native-background-downloader';
+import RNBackgroundDownloader, { completeHandler, DownloadTask } from 'react-native-background-downloader';
 
 // Set global headers for downloader
 RNBackgroundDownloader.setHeaders({
@@ -35,24 +31,25 @@ const task = RNBackgroundDownloader.download({
 const taskFuncTest = (task: DownloadTask) => {
     // Check task state
     switch (task.state) {
-        case DownloadTaskState.DONE: {
+        case 'DONE': {
             console.log('Task is in state DONE');
             break;
         }
-        case DownloadTaskState.DOWNLOADING: {
+        case 'DOWNLOADING': {
             console.log('Task is in state DOWNLOADING');
             break;
         }
-        case DownloadTaskState.PAUSED: {
+        case 'PAUSED': {
             console.log('Task is in state PAUSED');
             break;
         }
-        case DownloadTaskState.FAILED: {
+        case 'FAILED': {
             console.log('Task is in state FAILED');
             break;
         }
-        case DownloadTaskState.STOPPED: {
+        case 'STOPPED': {
             console.log('Task is in state STOPPED');
+            break;
         }
     }