@Component @Tag("iron-a11y-keys-behavior") public class IronA11yKeysBehavior implements KeyListener { // ... } @Override public void handleKeyPress(KeyPressEvent event) { // ... } @Override public void handleKeyRelease(KeyReleaseEvent event) { // ... } @PolymerRegister @Tag("my-custom-component") public class MyCustomComponent extends Component { // ... } @DomEvent("keydown") public static class KeydownEvent extends ComponentEvent<MyCustomComponent> { public KeydownEvent(MyCustomComponent source, boolean fromClient) { super(source, fromClient); } } @Push @Route("example") public class ExampleView extends VerticalLayout { @Autowired public ExampleView(MyCustomComponent component) { component.addKeyPressListener(IronA11yKeysBehavior.class, IronA11yKeysBehavior.KeydownEvent.class, MyCustomComponent::onKeydown); // ... } } <dependency> <groupId>com.vaadin</groupId> <artifactId>vaadin-spring-boot-starter</artifactId> </dependency>