How to render a component if a parameter is presented in the URL

Question

i have a div that contains some text and i want to display it if a parameter is presented in the url

as in JSTL

<c:if ${param.loginError!=null}>

<div>

Wrong username/password

</div>

</c:if>

how to do that in JSF ?

Answer 1

Use the rendered attribute.

<h:panelGroup layout="block" rendered="#{param.loginError != null}">
    Wrong username/password.
</h:panelGroup>

See also:

• Conditionally displaying JSF components
• How do I display a message if a jsf datatable is empty?