n00b programmer n00b programmer - 10 months ago 123
Javascript Question

Check if PrimeFaces widgetVar exists

I have a Primefaces commandButton, that calls a datatable filter in its onComplete. The datatable is referenced by a widgetVar:

<p:commandButton id="addFishBtn"
title="Add Fish"

The problem is, that fishTable doesn't always exist when this button is pressed. It it doesn't exist, the app just gets stuck. I tryed something like this from other SO questions:

oncomplete="if(typeof(fishTable) != 'undefined') {fishTable.filter()}"

But it doesn't seem to be doing anything. Is there any proper way to check if a widgetVar currently has any value?


Answer Source

You may use the following

if(PrimeFaces.widgets['fishTable']) {
   //widgetVar does exist