Question

Hello Everyone I would like to open a rich:popupPanel inside a conditional expression, actually what I’m trying is something like this:

onclick="#{searchBackingBean.showLoginPanel==true ? #{rich:component('loginPopup')}.show();':''}"

However I’m getting errors related to EL, how should I write this correctly?.
Thanks a lot.

Answer 1

You may not nest EL expressions. I suggest to rewrite the expression as follows so that the condition is delegated to JavaScript:

onclick="if (#{searchBackingBean.showLoginPanel}) #{rich:component('loginPopup')}.show();"

(please note that I removed the superfluous == true comparison because this makes no sense as the method returns/prints a boolean value already)

Note that this only works in <rich:xxx> and <a4j:xxx> components as they have enhanced the on* attributes to re-evaluate the EL expression on postbacks. The standard JSF <h:xxx> components doesn’t do that. You’d need to workaround it with the rendered attribute:

<h:commandButton>
    <f:ajax render="script" />
</h:commandButton>
<h:panelGroup id="script">
    <h:panelGroup rendered="#{searchBackingBean.showLoginPanel}">
        <script>#{rich:component('loginPopup')}.show();</script>
    </h:panelGroup>
</h:panelGroup>