In fact, you can use the cancel property in draggable to prevent the scroll effect on the drag element.
For instance:
if your html looks like this:
<div class="draggable"> <div class="scrollable"></div> </div>
for js:
$('.draggable').draggable({ cancel: '.scrollable' });
When scrolling in this specific area, the external drag and drop element will be temporarily disabled.
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