[Event Name] dragenter [Target] Immediate user selection or the body element [Cancelable?] ✓ Cancelable [dropEffect] Based on effectAllowed value [Default Action] Reject immediate user selection as potential target element [Drag data store mode] 
Protected mode
R e a d / w r i t e m o d e
P r o t e c t e d m o d e
R e a d - o n l y m o d e