Interface BeforeLeaveObserver

All Superinterfaces:

BeforeLeaveHandler, Serializable

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface
public interface BeforeLeaveObserver
extends BeforeLeaveHandler

Any attached component implementing this interface will receive an event before leaving the current navigation state.

During this event phase there is the possibility to reroute to another navigation target or to postpone the navigation (to for instance get user input).

Since:

1.0

Author:

Vaadin Ltd