Question

Can I send Ajax “update” commands to JSF components that have not been rendered due to render option previously set to false:

render="#{BackingBean.doRender}"

doRender is set to true just before “update” has been sent.

Is this the right way?

I am using PrimeFaces and one component does not show after update even doRender is set to true in the meantime.

Answer 1

The ajax update works by JavaScript with the JSF-generated HTML DOM tree (as the webbrowser has retrieved). If a JSF component is not rendered, then it does not appear in the HTML DOM tree at all and hence JavaScript can’t find anything to update.

You need to update a parent component instead, which is always rendered.

E.g.

<h:panelGroup id="foo">
    <h:someComponent rendered="#{bean.rendered}" />
</h:panelGroup>

with

<p:commandButton ... update="foo" />