A method and system for enabling transfer of widgets across containers at runtime. According to embodiments of the present invention, a user is allowed to transfer a widget across containers at runtime, for example, moving a widget that has been deployed and operated in one widget container to another, even though the destination widget container originally does not support the widget. Specifically, the widget being transferred can keep consistency in terms of data and state before and after the transfer. Furthermore, the user can implement the cross-container transfer of widgets at runtime by, for example, convenient interaction means like a drag-and-drop operation. In this way, the user can operate and interact with Web applications in a more convenient and flexible way.