fix: all codepaths should return a value

Author: iOvergaard

packages/uui-file-dropzone/lib/uui-file-dropzone.element.ts

@@ -133,7 +133,7 @@ export class UUIFileDropzoneElement extends LabelMixin('', LitElement) {
   }
 
   private async _getAllFileEntries(
-    dataTransferItemList: DataTransferItemList,
+    dataTransferItemList: DataTransferItemList
   ): Promise<File[]> {
     const fileEntries: File[] = [];
     // Use BFS to traverse entire directory/file structure
@@ -152,7 +152,7 @@ export class UUIFileDropzoneElement extends LabelMixin('', LitElement) {
         if ('webkitGetAsEntry' in entry === false) continue;
         const directory = entry.webkitGetAsEntry()! as FileSystemDirectoryEntry;
         queue.push(
-          ...(await this._readAllDirectoryEntries(directory.createReader())),
+          ...(await this._readAllDirectoryEntries(directory.createReader()))
         );
       }
     }
@@ -163,7 +163,7 @@ export class UUIFileDropzoneElement extends LabelMixin('', LitElement) {
   // Get all the entries (files or sub-directories) in a directory
   // by calling readEntries until it returns empty array
   private async _readAllDirectoryEntries(
-    directoryReader: FileSystemDirectoryReader,
+    directoryReader: FileSystemDirectoryReader
   ) {
     const entries: any = [];
     let readEntries: any = await this._readEntriesPromise(directoryReader);
@@ -175,15 +175,16 @@ export class UUIFileDropzoneElement extends LabelMixin('', LitElement) {
   }
 
   private async _readEntriesPromise(
-    directoryReader: FileSystemDirectoryReader,
+    directoryReader: FileSystemDirectoryReader
   ) {
-    try {
-      return await new Promise((resolve, reject) => {
+    return new Promise((resolve, reject) => {
+      try {
         directoryReader.readEntries(resolve, reject);
-      });
-    } catch (err) {
-      console.log(err);
-    }
+      } catch (err) {
+        console.log(err);
+        reject(err);
+      }
+    });
   }
 
   private _isAccepted(file: File) {
@@ -234,7 +235,7 @@ export class UUIFileDropzoneElement extends LabelMixin('', LitElement) {
       this.dispatchEvent(
         new UUIFileDropzoneEvent(UUIFileDropzoneEvent.CHANGE, {
           detail: { files: result },
-        }),
+        })
       );
     }
   }
@@ -260,7 +261,7 @@ export class UUIFileDropzoneElement extends LabelMixin('', LitElement) {
     this.dispatchEvent(
       new UUIFileDropzoneEvent(UUIFileDropzoneEvent.CHANGE, {
         detail: { files: files },
-      }),
+      })
     );
   }