effectAllowed property
The DataTransfer.effectAllowed
property specifies the
effect that is allowed for a drag operation. The copy operation is used
to
indicate that the data being dragged will be copied from its present
location to the
drop location. The move operation is used to indicate that the data
being
dragged will be moved, and the link operation is used to indicate that
some
form of relationship or connection will be created between the source and
drop
locations.
This property should be set in the HTMLElement.dragstart_event
event to
set the desired drag
effect for the drag source. Within the HTMLElement.dragenter_event
and
HTMLElement.dragover_event
event handlers, this property will be set to whatever value was assigned
during the
HTMLElement.dragstart_event
event, thus effectAllowed
may be used to
determine
which effect is permitted.
Assigning a value to effectAllowed
in events other than
HTMLElement.dragstart_event
has no effect.
Implementation
external String get effectAllowed;
Implementation
external set effectAllowed(String value);