Update thumbnails.js

src/js/thumbnails.js

@@ -1,7 +1,7 @@
 class Thumbnails {
     constructor (options) {
         this.container = options.container;
-        this.barWidth = options.barWidth;
+        this.barWrap = options.barWrap;
         this.container.style.backgroundImage = `url('${options.url}')`;
         this.events = options.events;
     }
@@ -18,8 +18,8 @@ class Thumbnails {
     }
 
     move (position) {
-        this.container.style.backgroundPosition = `-${(Math.ceil(position / this.barWidth * 100) - 1) * 160}px 0`;
-        this.container.style.left = `${Math.min(Math.max(position - this.container.offsetWidth / 2, -10), this.barWidth - 150)}px`;
+        this.container.style.backgroundPosition = `-${(Math.ceil(position / this.barWrap.offsetWidth * 100) - 1) * 160}px 0`;
+        this.container.style.left = `${Math.min(Math.max(position - this.container.offsetWidth / 2, -10), this.barWrap.offsetWidth - 150)}px`;
     }
 
     hide () {