fix(thumbs): ensure there is a slide to add a class

fixes #6335
nolimits4web · Feb 6, 2023 · c6294ad · c6294ad · ser-shant · May 17, 2023
1 parent 69462d2
commit c6294ad
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/src/modules/thumbs/thumbs.js b/src/modules/thumbs/thumbs.js
@@ -112,7 +112,9 @@ export default function Thumb({ swiper, extendParams, on }) {
       }
     } else {
       for (let i = 0; i < thumbsToActivate; i += 1) {
-        thumbsSwiper.slides[swiper.realIndex + i].classList.add(thumbActiveClass);
+        if (thumbsSwiper.slides[swiper.realIndex + i]) {
+          thumbsSwiper.slides[swiper.realIndex + i].classList.add(thumbActiveClass);
+        }
       }
     }