Question

What is the default action happening when we drag over an image ?

When I drag over an image the cursor changes to a black circle with a line inside (in Firefox) I could block it by the code e.preventDefault() using jquery, but I didn’t understand what is the default action happening when I drag over an image.

Thanks

Answer 1

The browser is telling you that the element over which you are hovering is not a drop target for the item being dragged.

jqueryui does implement draggable elements nicely and I believe they may handle that issue for you.

http://jqueryui.com/demos/draggable/

If you are trying to prevent drag or selection this post answers that:
Making an element unselectable using jQuery