How to check Google publisher tag ad slot is empty or not?

Question

I am using Google publisher tags to fetch the ads.

How to check whether I am getting an ad or any empty ad for an specific ad slot. I am using the below code.

googletag.defineSlot("/1234/travel", [[300,250],[300x600]], "div-gpt-ad-123456789-0"))


 <div id="div-gpt-ad-123456789-0" style="width: 728px; height: 90px">
  <script type="text/javascript">
      googletag.cmd.push(function() {
      googletag.display("div-gpt-ad-123456789-0");
      });
    </script>
  </div>

How to check this div("div-gpt-ad-123456789-0") contains an ad or not?

Answer 1

You could do something like this:

googletag.pubads().addEventListener('slotRenderEnded', function(event) {
    if (event.slot.getSlotElementId() == "div-gpt-ad-123456789-0") {
        var containsAd = !event.isEmpty;     
    }
});

Answer 2

The GPT API provides a "SlotRenderEndedEvent" which fires when the ad is rendered ( or if nothing is returned )

https://developers.google.com/doubleclick-gpt/reference

You add the handler and check for isEmpty to determine if an ad has been served.

Also if you've enabled CollapsEmptyDivs for the ad slot, the ad div will be set to display:none by GPT so that is also a clue that nothing was returned.

Answer 3

You can use an on-screen debugging tool called the Google Publisher Console to troubleshoot delivery problems.Use "?googfc" as querystring. Reference: https://support.google.com/dfp_premium/answer/2462712?hl=en