The new version of the Vaadin Add-on Directory is live! For those using Vaadin and add-ons daily, this is not anything new. It has been in public beta for over six months, and you have likely tried it out already. But if you are new to Vaadin, or haven’t really paid attention to the work of the ...

Any business application's user experience (UX) is essential because it directly influences how users interact with and perceive the product. A well-designed UX improves daily productivity, lessens friction, and leads to fewer mistakes, more efficiency, and happier users. Whether you want to ...

Dependency injection is magic, some say. It is magic, especially if you don’t understand what is happening behind the scenes. Vaadin developers have two almost identical scopes available for their beans: SessionScope (from Spring core) and VaadinSessionScope (from vaadin-spring). Picking the wrong ...

GraphQL has become a common alternative to REST as a way to provide data to modern web applications. They both solve the same problem, but GraphQL comes with a different set of trade-offs. It is designed to answer challenges pertinent to larger organizations, such as inter-team communication and ...

Kotlin is a programming language that has gained much popularity over the last few years. Its concise and expressive syntax feels liberating compared to the verbosity of Java. Vaadin supports the Kotlin programming language through the Karibu-DSL library, which contains various extensions to use ...

I recently did an exercise to clean up one of the most used view templates in the start.vaadin.com tool, the MasterDetailView. I implemented almost a dozen tricks to make the code readable and maintainable. I plan to cover some of those in the upcoming weeks, so I decided to start cleaning up the ...

Session Replication is a recurrent topic when talking about high availability. As mentioned in a previous article by Leif Åstrand, Session Replication in the World of Vaadin, the recommendation is to rely on session replication as little as possible. This is due to the efforts required to make the ...

Last spring we published a multifactor demo, showing how MFA could be seamlessly integrated into an application to create a smooth experience while protecting specific actions. Around the same time, the FIDO Alliance announced that Apple, Google, and Microsoft have committed to implementing a new ...

Vaadin TestBench is an awesome tool for creating integration tests for your application, but it's not immune to the problems caused by general slowness in your test environment. You might be running low on memory or disk space, or you might be temporarily trying to do more things on your test ...