The extension doesn’t work with elements in iframes. It shows saying that there are no Scroll-Driven Animations attached to the element even though there are.

[bramus]

E.g. https://codepen.io/bramus/pen/vYvXWyv: inspect the parent page first, and then select div.up in the iframe. The extension incorrectly shows that there are no animations attached while there certainly are!

[bramus]

This is the same issue as this issue …

• The extension doesn’t work with elements in iframes. It shows a _“Could not read the required data from the element.”_ error message #19

… but comes with a twist. Sometimes, the Chrome extension host sometimes lies about the value of $0 is upon selecting a node that is inside an iframe. Instead of returning undefined because it cannot access the not, it returns the last selected node that was not in the iframe before you selected an element inside the iframe.

A bug was filed on Chromium’s end in order to get this fixed: https://crbug.com/1480418

Because this bug needs to be fixed on Chrome’s end, I am marking this as wontfix This will not be worked on and adding it to the FAQ This question/bug is part of the FAQ .

[bramus]

Reopening so that the issue can be found when searching (because search defaults to non-closed issues)