How do you add a draggable scrollbar in flutter?

To add a scroll bar, just wrap your view with a Scrollbar widget . The only required parameter of a Scrollbar is a child widget. Others are optional. The child widget of the Scrollbar (ListView, GridView, …)

Web browsers do not take into account the width of the scrollbar on the side of a page when computing width values , so since we have a page that is longer than a single viewport, part of our page is being rendered behind the vertical scroll bar, causing the browser to display a horizontal scroll bar.

In Draggable Scrollbar you can try using ListView.