fix crash if dispatch is not a function

samvera-labs · May 1, 2024 · 2e763fb · 2e763fb
1 parent 49fc6ff
commit 2e763fb
Showing 1 changed file with 9 additions and 4 deletions.
diff --git a/src/components/Image/OSD/OSD.tsx b/src/components/Image/OSD/OSD.tsx
@@ -73,10 +73,15 @@ const OSD: React.FC<OSDProps> = ({
               openSeadragon?.addTiledImage({
                 tileSource,
                 success: () => {
-                  dispatch({
-                    type: "updateOSDImageLoaded",
-                    OSDImageLoaded: true,
-                  });
+                  // NOTE: need to check dispatch is a function, because when
+                  // using dev server, dispatch sometimes is set to
+                  // ViewerContext.defaultState object instead of a function
+                  if (typeof dispatch === "function") {
+                    dispatch({
+                      type: "updateOSDImageLoaded",
+                      OSDImageLoaded: true,
+                    });
+                  }
                 },
               });
             } catch (e) {