fixing types

app/lib/pdf/barcodeDecoder.ts

@@ -330,7 +330,7 @@ const copyBarcodeImage = (canvas:HTMLCanvasElement, decoderResult:Result):string
 }
 
 /** Finds PDF417 code within a file and decodes it */
-const decodeFromFile = async (file:File) => {
+const decodeFromFile = async (file:File): Promise<DecodeResult[]|null> => {
     switch(file.type) {
         case 'image/png':
         case 'image/jpeg':
@@ -341,13 +341,13 @@ const decodeFromFile = async (file:File) => {
             // if there are multiple pages, we will decode each page separately
             // and return the results from all pages
             const results = (await Promise.all(pageCanvas.map(async (canvas) => {
-                await yieldToBrowser('decodeFromCanvas');
-                return await decodeFromCanvas(canvas);
-            })))
+                    await yieldToBrowser('decodeFromCanvas');
+                    return await decodeFromCanvas(canvas);
+                })))
                 // remove null results (pages with no PDF417 codes)
                 .filter((result) => result !== null)
                 // flatten the array of arrays into a single array
-                .flat();
+                .flat() as DecodeResult[];
 
             return(results);
         default: