as shown in the dynamic diagram, the left menu bar scrolls normally, but to the last, because the scrolling height does not reach the scrolling height of the item on the right, so when the currently active menu bar is not high enough, it will not always be highlighted normally because it is not high enough, and it is the same with scrolling feedback from the right to the left, which can not make the last menu active
. < hr > In fact,is not limited to the last one, that is, the product label will not change the current active index until it passes to the left of the top of the container. As long as you scroll to the end, the first few tags are not high enough to update their active status. I wonder if the expression is clear? Has been bothered for most of the day, trying to solve