Refactoring

src/module/Directory.ts

@@ -8,7 +8,7 @@ export class Directory {
 
   async getDirectory(name: string): Promise<Directory> {
     if (this.#directories.has(name)) {
-      return this.#directories.get(name) as Directory;
+      return this.#directories.get(name)!;
     }
 
     const handler = await this.#handler.getDirectoryHandle(name, {

src/module/downloadFiles.ts

@@ -21,9 +21,9 @@ export const downloadFiles = async ({ includePageId }: IState): Promise<void> =>
     }
   }
 
-  const [, rootDir] = await getRootDir();
+  const rootDir = await getRootDir();
 
-  if (rootDir === null) {
+  if (rootDir == null) {
     return;
   }
 

src/module/fs.ts

@@ -7,19 +7,17 @@ export const getRootDir = async () => {
       mode: 'readwrite',
     });
 
-    return [null, new Directory(handler)] as const;
+    return new Directory(handler);
   } catch (error) {
     if (error instanceof DOMException) {
-      return [error, null] as const;
+      return;
     }
 
     throw error;
   }
 };
 
-export const duplicateErrorMessage = (page: IPage): void => {
-  const message = `A few pages with duplicate titles - "${page.title}".\n\n` +
-    'Please rename each duplicate page title and reload the browser tab or check on ✅ "Include page ID"';
-
-  alert(message);
-};
+export const duplicateErrorMessage = (page: IPage) => alert(
+  `A few pages with duplicate titles - "${page.title}".\n\n` +
+  'Please rename each duplicate page title and reload the browser tab or check on ✅ "Include page ID"',
+);