Vaadin 23.3.7: dev mode+Material theme fails with DOMException

[mvysny]

Description of the bug

When starting Vaadin 23.3.7 in Dev mode with Material theme, the Main route never gets rendered. The loading progress bar blinks endlessly. There is a JavaScript exception in the console:

Uncaught (in promise) DOMException: CustomElementRegistry.define: 'vaadin-material-styles' has already been defined as a custom element

Cleaning up everything with mvn vaadin:dance doesn't help.

Expected behavior

The main route should be rendered properly.

Minimal reproducible example

Easily reproducible in the skeleton starter:

1. git clone https://github.com/vaadin/skeleton-starter-flow-spring
2. git checkout v23
3. Add @Theme(themeClass = Material.class) to the Application class, and remove CssImports from the MainView.
4. Run Application.main() via IDE in dev mode.

Note: Production mode works properly.

Versions

• Vaadin / Flow version: 23.3.7
• Java version: 17
• OS version: Ubuntu 22.10
• Browser version (if applicable): Firefox
• Application Server (if applicable): Tomcat/Spring Boot
• IDE (if applicable): Intellij

[Artur-]

This works correctly with Vaadin 24.0.2

[Artur-]

Ah, it only works in dev bundle mode

[vaadin-bot]

This ticket/PR has been released with Vaadin 23.3.11.

[vaadin-bot]

This ticket/PR has been released with Vaadin 24.0.4.

[vaadin-bot]

This ticket/PR has been released with Vaadin 24.1.0.alpha3 and is also targeting the upcoming stable 24.1.0 version.