com.vaadin.flow.server

Interface BootstrapListener

All Superinterfaces:

EventListener, 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 BootstrapListener
extends EventListener, Serializable

This event listener is notified when the bootstrap HTML is about to be generated and sent to the client. The bootstrap HTML is first constructed as an in-memory DOM representation which registered listeners can modify before the final HTML is generated.

BootstrapListeners are registered using the ServiceInitEvent during the initialization of the application.

Since:

1.0

Author:

Vaadin Ltd

See Also:

ServiceInitEvent.addBootstrapListener(BootstrapListener)

Method Summary

Modifier and Type	Method and Description
void	modifyBootstrapPage(BootstrapPageResponse response) Lets this listener make changes to the overall HTML document that will be used as the initial HTML page, as well as the HTTP headers in the response serving the initial HTML.

Method Detail

modifyBootstrapPage

void modifyBootstrapPage(BootstrapPageResponse response)

Lets this listener make changes to the overall HTML document that will be used as the initial HTML page, as well as the HTTP headers in the response serving the initial HTML.

Parameters:

response - the bootstrap response that can be modified to cause change in the generate HTML and in the HTTP headers of the response.