From 23d012d9fef0c25fc6196ba11dfcdce219c94db0 Mon Sep 17 00:00:00 2001
From: Michael Telatynski <7t3chguy@gmail.com>
Date: Wed, 14 Sep 2022 10:57:53 +0100
Subject: [PATCH] Update image-media.ts

---
 src/utils/image-media.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/utils/image-media.ts b/src/utils/image-media.ts
index 1f1db277274..c3320627d01 100644
--- a/src/utils/image-media.ts
+++ b/src/utils/image-media.ts
@@ -92,7 +92,7 @@ export async function createThumbnail(
     context.drawImage(element, 0, 0, targetWidth, targetHeight);
 
     let thumbnailPromise: Promise<Blob>;
-    if (canvas instanceof window.OffscreenCanvas) {
+    if (window.OffscreenCanvas && canvas instanceof window.OffscreenCanvas) {
         thumbnailPromise = canvas.convertToBlob({ type: mimeType });
     } else {
         thumbnailPromise = new Promise<Blob>(resolve => (canvas as HTMLCanvasElement).toBlob(resolve, mimeType));