How do I determine if a h:message is going to be rendered

Question

I have code like the following and would like to know how to render the exterior div conditionally.
<div>
<h:messages></h:messages>
</div>
something like this:
<c:if test="#{}">
<div>
<h:messages></h:messages>
</div>
</c:if>

Answer 1

You can check if the Iterator of FacesContext#getMessages() has a next element.
Something like:<h:panelGroup layout="block" rendered="#{myBean.nextMessage}">
    <h:messages />
</h:panelGroup>
public boolean isNextMessage() {
    return FacesContext.getCurrentInstance().getMessages().hasNext();
}The h:panelGroup with layout set to "block" renders a div element and you can just use its rendered attribute to toggle its visibility in the server side.