[Event Name] dragover [Target] Current target element [Cancelable?] ✓ Cancelable [dropEffect] Based on effectAllowed value [Default Action] Reset the current drag operation to "none" [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