How to trigger component refresh from javascript in primefaces?

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You can use PrimeFaces’ <p:remoteCommand> for this.

<p:remoteCommand name="updateGrowl" update="showmessage" />

which is to be invoked as

<p:commandButton ... oncomplete="addMemberDlg.hide(); updateGrowl();" />

In this particular case there’s however a simpler way. Set the autoUpdate attribute of <p:growl> to true.

<p:growl autoUpdate="true" life="1500" id="showmessage"/>

It’ll auto-update itself on every ajax request. If your component actually didn’t support it, then you could always wrap it in a <p:outputPanel> which also supports that attribute.

<p:outputPanel autoUpdate="true">
    ...
</p:outputPanel>

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