Prevent error to be thrown when targetLeft is not available

marcus-drake · marcus-drake · commit f46206c8014c · 2016-10-19T21:03:37.000+02:00
diff --git a/src/mixins/trackHelper.js b/src/mixins/trackHelper.js
@@ -143,8 +143,9 @@ export var getTrackLeft = function (spec) {
               targetSlide = ReactDOM.findDOMNode(spec.trackRef).children[(spec.slideIndex + spec.slidesToShow + 1)];
           }
 
-          targetLeft = targetSlide ? targetSlide.offsetLeft * -1 : 0;
-          targetLeft += (spec.listWidth - targetSlide.offsetWidth) / 2;
+          if (targetSlide) {
+            targetLeft = targetSlide.offsetLeft * -1 + (spec.listWidth - targetSlide.offsetWidth) / 2;
+          }
       }
   }
 

Original file line number	Diff line number	Diff line change
`@@ -143,8 +143,9 @@ export var getTrackLeft = function (spec) {`
`143`	`143`	`targetSlide = ReactDOM.findDOMNode(spec.trackRef).children[(spec.slideIndex + spec.slidesToShow + 1)];`
`144`	`144`	`}`
`145`	`145`
`146`		`- targetLeft = targetSlide ? targetSlide.offsetLeft * -1 : 0;`
`147`		`- targetLeft += (spec.listWidth - targetSlide.offsetWidth) / 2;`
	`146`	`+ if (targetSlide) {`
	`147`	`+ targetLeft = targetSlide.offsetLeft * -1 + (spec.listWidth - targetSlide.offsetWidth) / 2;`
	`148`	`+ }`
`148`	`149`	`}`
`149`	`150`	`}`
`150`	`151`