Bugfix: Check for existence of swiper instance before picking the sli…

…de index. (#11703)
Automattic · Mar 27, 2019 · 21f9072 · 21f9072
1 parent a0204eb
commit 21f9072
Showing 1 changed file with 8 additions and 4 deletions.
diff --git a/extensions/blocks/slideshow/slideshow.js b/extensions/blocks/slideshow/slideshow.js
@@ -68,10 +68,14 @@ class Slideshow extends Component {
 			delay !== prevProps.delay ||
 			images !== prevProps.images
 		) {
-			const realIndex =
-				images.length === prevProps.images.length
-					? this.swiperInstance.realIndex
-					: prevProps.images.length;
+			let realIndex;
+			if ( ! this.swiperIndex ) {
+				realIndex = 0;
+			} else if ( images.length === prevProps.images.length ) {
+				realIndex = this.swiperInstance.realIndex;
+			} else {
+				realIndex = prevProps.images.length;
+			}
 			this.swiperInstance && this.swiperInstance.destroy( true, true );
 			this.buildSwiper( realIndex )
 				.then( swiper => {