Hi Juergen, I just tried to use MarkupUtil.isMarkupHtml5Compliant() for the new HTML5 input types and it failed with:
Caused by: java.lang.NullPointerException at org.apache.wicket.markup.html.MarkupUtil$1.component(MarkupUtil.java:56) at org.apache.wicket.markup.html.MarkupUtil$1.component(MarkupUtil.java:1) at org.apache.wicket.util.visit.Visits.visitChildren(Visits.java:142) at org.apache.wicket.util.visit.Visits.visitChildren(Visits.java:118) at org.apache.wicket.MarkupContainer.visitChildren(MarkupContainer.java:919) at org.apache.wicket.markup.html.MarkupUtil.isMarkupHtml5Compliant(MarkupUtil.java:52) at org.wicketstuff.html5.markup.html.form.NumberField.onInitialize(NumberField.java:38) at org.apache.wicket.Component.fireInitialize(Component.java:989) at org.apache.wicket.MarkupContainer.initialize(MarkupContainer.java:992) at org.apache.wicket.MarkupContainer.addedComponent(MarkupContainer.java:972) at org.apache.wicket.MarkupContainer.add(MarkupContainer.java:162) at org.wicketstuff.html5.markup.html.form.NumberFieldDemo.<init>(NumberFieldDemo.java:19) So I changed MarkupUtil line 56: MarkupResourceStream rs = comp.getAssociatedMarkup().getMarkupResourceStream(); with MarkupResourceStream rs = comp.getMarkup().getMarkupResourceStream(); and now there is no NPE but it returns "null" for doctype. The page HTML looks like: http://pastie.org/1359239 The code is at https://wicket-stuff.svn.sourceforge.net/svnroot/wicket-stuff/trunk/wicketstuff-core/jdk-1.6-parent/wicket-html5-parent see NumberFieldDemo in examples and NumberField in impl project. martin-g