Syntax dataTransfer . Selection is copied or moved, depending on the target default.
Selection is linked or moved, depending on the target default.
No value has been set through the effectAllowed property. In this case, the default effect still works, although it cannot be queried through this property. The property has a default value of uninitialized . Remarks Set the effectAllowed property in the ondragstart event. This property is used most effectively with the dropEffect property.