edataTransferdropEffect

edataTransferdropEffect is a property found in some drag-and-drop implementations that exposes the intended effect of a drop operation within the edata transfer API. It is conceptually similar to the standard DataTransfer.dropEffect but belongs to an extended or framework-specific data transfer model. The property communicates what should happen if the item is dropped, aiding drop targets in deciding how to handle the data and how to present UI feedback.

Possible values align with the traditional drag-and-drop semantics: none, copy, move, and link. None indicates that dropping is not allowed, while copy, move, and link designate the corresponding operations. The exact interpretation can vary by framework, but the common expectation is that these values guide the resulting action (data copy, relocation, or link creation) or be used to enable or disable drop targets.

Usage and behavior typically involve selecting or updating the edataTransferdropEffect in response to user interactions, such as keyboard modifiers or UI cues. Drop targets read the value to determine whether to accept the drop and how to process the transferred data. Implementations may also synchronize the visual feedback of the drag-and-drop operation with the current edataTransferdropEffect.

Interoperability and fallbacks: in environments that do not support edataTransferdropEffect, standard DataTransfer.dropEffect often remains the primary signal for drop behavior. Some frameworks may map edataTransferdropEffect to the underlying DataTransfer API or reflect it in the browser’s drag-and-drop semantics.

See also: DataTransfer.dropEffect, drag and drop API, drag events, edata transfer framework.