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Themes: Reserve space for images/videos in first view to help with CLS

As we're trying to address Cumulative Layout Shift issues we are noticing that our lead story on our homepages has a delay on when the image/video renders and it's causing the page to shift.


We would like for Arc to consider reserving a min-height for the image or video to help reduce this CLS when an image is selected and expected from to display.


If we need to be specific, this is a Top Table List, Extra Large with image selected. We use the 16:9 image ratio, but obviously you would only want to reserve space for the smallest ratio.


Attached is a view of mobile and desktop PageSpeed Insights that shows the CLS.


  • Sara Skinner Cole
  • May 27 2021
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    • Admin
      Jenae Cerovac commented
      August 23, 2021 21:43

      Improvements to reduce CLS were included in our Themes 1.13 release to production on 8/18/2021.

    • Admin
      Sara Carothers commented
      June 08, 2021 19:23

      Hi Sara, thanks for this. We're going to look into it and see if we can come up with a solution.