Nowadays, it is rare to implement all software with a single technology. There are different teams and requirements, which is a good reason to allow a certain amount of variance in the software toolkit. The same goes for UI frameworks, and that's the way it should be. Hosting static HTML files ...

JWT (JSON Web Token) is a popular way to handle authentication in stateless, browser-centric web UIs. Vaadin Flow runs its UI state and logic in the server memory – by design. Without that, Flow users couldn’t have the pure Java developer experience and simplicity they love. At first glance, it ...

Starting Java web applications is not an instantaneous process. It is not rare to see tens of seconds for some applications to boot. Although you can get an almost instant startup time if you leave out Hibernate and run Quarkus on GraalVM, that’s not the reality we live in. During development, ...

The server-side nature of Vaadin Flow often causes concerns for those who evaluate it: The UI must be slow, as the UI logic is on the server and the “chatty” connection will bring the server to its knees. In this era, it can be hard to convince your boss or fellow engineers in the face of these ...

Liferay has advocated strongly for OSGi lately. And we have lagged behind with this. Our plan was to look into Liferay support for Vaadin 14 after getting OSGi compatibility for npm done. But not every Liferay user needs OSGi. You can already build Vaadin 14 portlets today! Create Liferay portlets ...

Vaadin has been a popular UI technology for OSGi-based Java solutions for years. Many OSGi users are still on Vaadin 7 or 8. Last year their migrations almost stalled, as Vaadin 14 only supported OSGi in the “compatibility mode". Compatibility mode uses the deprecated Bower + WebJars-based solution ...

About a year ago, I discussed two common problems when doing lazy data binding to the Grid: the need for a count query and difficulties integrating with “paging backends”. That generated a lot of public and private discussion. The solutions are now available for testing. And while we were on the ...

Gradle users have traditionally been "second-class citizens" as Vaadin users. We received many requests to provide official Gradle support in our most recent community survey. The Gradle build plugin was a community effort (even though it was sponsored by Vaadin), and Vaadin project creation on our ...

Vaadin has always provided a strong abstraction for web development. The component-based Java API and completely abstracted client-server programming model make development of web UIs as easy and efficient as developing traditional desktop apps. Because the UI code resides in the JVM, accessing ...