When using Web Vitals extension, I see the rating but why isn't the value data element being populated for the Cumulative Layout Shift (CLS)? | Community
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deecsilva
Level 2
July 6, 2023
Solved

When using Web Vitals extension, I see the rating but why isn't the value data element being populated for the Cumulative Layout Shift (CLS)?

  • July 6, 2023
  • 1 reply
  • 2204 views

Here's a screenshot of of analytics going through for 3 of the web vital attributes (FID, LCP, & CLS).. the value is coming through for FID and LCP but not CLS for whatever reason.

 

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Best answer by yuhuisg

I think I know why you're facing this problem. It is possible for CLS to return a value of 0, i.e. zero. However, I had incorrectly programmed the Metric Value (and Metric Delta) data elements to return "undefined" in such cases.

I've made a fix so that the data elements return 0 properly. I've submitted my v1.4.2 extension with this fix to Adobe for public release. Hopefully, Adobe can release my updated extension soon.

1 reply

yuhuisg
Community Advisor
yuhuisgCommunity Advisor
Community Advisor
July 7, 2023

Hi, I'm the developer of that Web Vitals extension. What you're experiencing should not be happening.

Can you share a test page that has this problem, so that I can observe what is happening to troubleshoot further?

D
deecsilvaAuthor
Level 2
July 7, 2023

Hi yuhuisg, I'm unfortunately unable to share a test page, I know that isn't very helpful in troubleshooting.  But we followed the documentation for setting the variables for each of the elements.. it's just odd that everything would work except for a CLS value

    yuhuisg
    Community Advisor
    yuhuisgCommunity AdvisorAccepted solution
    Community Advisor
    July 7, 2023

    I think I know why you're facing this problem. It is possible for CLS to return a value of 0, i.e. zero. However, I had incorrectly programmed the Metric Value (and Metric Delta) data elements to return "undefined" in such cases.

    I've made a fix so that the data elements return 0 properly. I've submitted my v1.4.2 extension with this fix to Adobe for public release. Hopefully, Adobe can release my updated extension soon.

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