Add custom ajax command to ajax response after webform is submitted

What I’m trying to do is to invoke some javascript after a webform is successfully submitted by ajax.

To do that I followed this advice and created an EventSubscriber to intercept ajax response and add my custom command there. The problem is that on some reason I can’t check if the webform is submitted (data are sent) or not.

  public function onResponse(FilterResponseEvent $event) {     if($event->getResponse() instanceof WebformSubmissionAjaxResponse &&        $event->getResponse()->getWebformSubmission()->isCompleted()) {          $event->getResponse()->addCommand(new MyCustomCommand());     }   } 

The problem is in isCompleted() method which always returns false on some reason. Actually I checked other methods from WebformSubmissionInterface and in this my event subscriber this WebformSubmission entity always looks empty (getters return nothing) and geState() always returns “STATE_UNSAVED” not depending if a webform is successfully sent of failed on validation.

What I’m missing? Is anything I’m doing wrong here? Or maybe are there any other method to achive same goal?

This article was republished from its original source.
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Add custom ajax command to ajax response after webform is submitted

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