Vaadin

Support for developing applications based on the Vaadin framework is not bundled with IntelliJ IDEA.

The Vaadin Designer plugin is no longer supported. The latest IDE version compatible with the plugin is IntelliJ IDEA 2022.3.

You can find the documentation for the Vaadin support in IntelliJ IDEA in earlier versions of IntelliJ IDEA Help. The plugin source code is available on GitHub