fix navigating back to zero index

slidr-app · Jun 6, 2023 · d330969 · d330969
1 parent daa04f1
commit d330969
Showing 1 changed file with 6 additions and 2 deletions.
diff --git a/src/slides/use-slide-index.ts b/src/slides/use-slide-index.ts
@@ -37,8 +37,12 @@ export function useSlideIndex({
   );
 
   const updateSlideIndex = useCallback((index?: number) => {
-    if (index) {
-      setSlideIndex(index);
+    // Heartbeat messages can include an index (if sent from the presentation view)
+    // Sometimes this gets called and there is no index (heartbeats from other views)
+    // Update the index if one is included.
+    // Use isInteger because the 0 index is a falsy value (can't just check for a truthy value)
+    if (Number.isInteger(index)) {
+      setSlideIndex(index!);
     }
   }, []);