Vaadin Blog
Simplified Theming in Vaadin 24
Vaadin 24 introduces a simplified approach to styling Vaadin components based on the ::part() selector. It removes the need for component-specific stylesheets, simplifies many common use cases, and is fully based on native CSS. New theming documentation, including CSS selector references for ...
Toggle between light and dark theme in Vaadin Flow
Updated to Vaadin Flow 24 on 2023-02-23 A common question we get from Vaadin developers is how to switch on the dark theme variant dynamically. In this tutorial, I’ll show you how to turn it on permanently, and how to dynamically apply the dark variant to the entire application or only parts of it. ...
Still on V8? Automate your application upgrade to Vaadin 23
Vaadin 8 reached its end of life a year ago, on February 21, 2022, five years after its initial release. The last free version under the Apache 2 license was 8.14.3. Without an application upgrade, your Vaadin 8 app continues to function as expected. However, you no longer receive the following: ...
Your frequently asked Hilla questions answered
I had the pleasure of speaking about Hilla at four events in January: Boulder JUG, Denver JUG, Utah JUG, and a webinar hosted by Vaadin. It was a great opportunity to connect with developers in person and get their initial reactions to Hilla. The feedback developers shared was overwhelmingly ...
Practical Tips for Improving Your UX
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 ...
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SessionScope vs. VaadinSessionScope - Which one should you use?
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 ...
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Kotlin and Vaadin for productive and fun web app development
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 ...
Session Replication in Vaadin: What’s new?
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 ...
Performance profiling: Rendering 90k table cells in 5 different ways
I met a customer at W-JAX who had a performance issue with one of their screens. They were rendering a huge 90-column and around 1000-row TreeGrid on that screen. The screen was a preview for a database query that would ultimately be downloaded as a file for further analysis in another software. ...