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  • Troubleshooting undefined values with GA4 configuration tag fields

    Posted by Daniel on 21 February 2023 at 10:06 pm

    Yo, I’ve got this little problem here that’s really bugging me, and I was thinking maybe one of you wizards could help me out. I’m doing a thing with the GA4 Configuration tag, right? But something’s off. The fields that have been set in it keep giving me these pesky undefined values when the tag gets fired. Weird, huh?

    Now check this out – here’s the dataLayer from the website:

    dataLayer.push({
      event: "virtualPageview",
      membershipType: "xxxxx",
      pageCategory: "xxxx",
      loginstatus: "logged-in",
      userId: "9330000",
      gtm.uniqueEventId: 14
    })
    

    Here are the images of what’s going on: [screenshot 1], [screenshot 2].

    Now, I ain’t no amateur. I tried the dataLayer variable in GTM, but nope, nada, zilch. It didn’t do squat. So lay it on me, folks. Anyone got a bright idea?

    Grayson replied 11 months ago 3 Members · 2 Replies
  • 2 Replies
  • Harper

    Member
    4 March 2023 at 5:24 am

    It sounds like you might be dealing with a timing issue. If the GA4 Configuration tag is firing before your dataLayer is populated, the variables will be undefined because the data isn’t there yet when your tag fires. To solve this, you can create a custom event trigger that precisely fires when the dataLayer population happens. You ensure this by making the custom event trigger using the same event name you’re using to push the dataLayer. Then attach this new custom event trigger to the GA4 Configuration tag. That way, the tag should only fire once the data is already in place, solving the undefined issue.

  • Grayson

    Member
    29 June 2023 at 11:26 am

    Yo, sounds like your tag is firing before the dataLayer is ready, kind of like showing up to a party before the host’s even there. Try using a trigger to make sure your tag only fires when the dataLayer is complete and ready to go. Haste makes waste, right? So give that a shot, and see if your undefined values become a thing of the past.

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