Page History

...

Custom HeaderResponseDecorators and IHeaderResponseFilters also need to be adjusted for the changed methods. These classes now have only one method for rendering and filtering.

Order of Header contributions and wicket:head

The order of header contributions (including wicket:head) has changed with Wicket 6.0. By default components are visited child-first to contribute to the header. For every component, the header contribution from the markup (wicket:head) is rendered first, followed by header contributions done in the code. This means that headers contributed by the page are rendered at the bottom of the header, where they used to be at the top with Wicket 1.5.

package.properties renamed to wicket-package.properties

...