Emit event immediately if only 1 mutation

Ref nolimits4web#2731
joejoseph00 · Jul 31, 2018 · e19a4d2 · e19a4d2
1 parent 8d102b6
commit e19a4d2
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/src/modules/observer/observer.js b/src/modules/observer/observer.js
@@ -12,6 +12,10 @@ const Observer = {
       // The observerUpdate event should only be triggered
       // once despite the number of mutations.  Additional
       // triggers are redundant and are very costly
+      if (mutations.length === 1) {
+        swiper.emit('observerUpdate', mutations[0]);
+        return;
+      }
       const observerUpdate = function observerUpdate() {
         swiper.emit('observerUpdate', mutations[0]);
       };