fix(lazy): use passive listener for scroll listeners

nolimits4web · May 28, 2021 · cbe7a59 · cbe7a59
1 parent 5d9a093
commit cbe7a59
Showing 1 changed file with 9 additions and 2 deletions.
diff --git a/src/components/lazy/lazy.js b/src/components/lazy/lazy.js
@@ -201,12 +201,19 @@ const Lazy = {
       }
     }
 
+    const passiveListener =
+      swiper.touchEvents.start === 'touchstart' &&
+      swiper.support.passiveListener &&
+      swiper.params.passiveListeners
+        ? { passive: true, capture: false }
+        : false;
+
     if (inView) {
       swiper.lazy.load();
-      $scrollElement.off('scroll', swiper.lazy.checkInViewOnLoad);
+      $scrollElement.off('scroll', swiper.lazy.checkInViewOnLoad, passiveListener);
     } else if (!swiper.lazy.scrollHandlerAttached) {
       swiper.lazy.scrollHandlerAttached = true;
-      $scrollElement.on('scroll', swiper.lazy.checkInViewOnLoad);
+      $scrollElement.on('scroll', swiper.lazy.checkInViewOnLoad, passiveListener);
     }
   },
 };