Page History

...

The old API returned Iterable<? extends HeaderItem> and was inconvenient to override and add additional dependencies.
With the new API it is as easy as:

@Override
public List<HeaderItem> getDependencies() {
  List<HeaderItem> dependencies = super.getDependencies();
  dependencies.add(dep1);
  dependencies.add(dep2);
  return dependencies;
}

...

To use AjaxFormValidatingBehavior in Wicket 6.x the application code should do something like:

AjaxFormValidatingBehavior.addToAllFormComponents(form, "keydown", Duration.ONE_SECOND);

...

The behavior has been reworked a bit to allow this. The new usage is:

form.add(new AjaxFormValidatingBehavior("keydown", Duration.ONE_SECOND);

or

formComponent.add(new AjaxFormValidatingBehavior("keydown", Duration.ONE_SECOND);

...

To migrate it you should do something like:

...
@Override
protected String getInputType()
{
	return "sometype";
}
...

to

...
@Override
protected String[] getInputTypes()
{
	return new String[] { "sometype" };
}
...

...

Rename PageSettings#recreateMountedPagesAfterExpiry to #recreateBookmarkablePagesAfterExpiry WICKET-5829

Rename IStaticCacheableResource#getCacheableResourceStream() to #getResourceStream() WICKET-5909

Behavior changes

org.apache.wicket.request.Url#getQueryString WICKET-4664

...