[drupalImage] Caption images filter incompatible with CKEditor 5 image resizing

Great catch!

AFAICT https://github.com/ckeditor/ckeditor5/issues/5154 would fix this, which would make it related to 🐛 EditorFileReference should compute a px if a % is specified, even though % is not allowed in HTML5 Needs work .

On second thought, this would actually mean that this is an upstream bug: it looks like CKEditor 5 blindly assumes that the <figure> wrapping an <img> has the same width as the figure?!

Assigning to @lauriii for confirmation.

I was trying to point out a bug that is happening when the content is being processed into \Drupal\filter\Render\FilteredMarkup. As part of that process, <figure> element is created in \Drupal\filter\Plugin\Filter\FilterCaption::process based off data-caption. It sounds like there are two separate bugs, one within CKEditor 5, and one that is related to \Drupal\filter\Plugin\Filter\FilterCaption.

This looks like a duplicate of 🐛 CKEditor 5 resizes images with % width instead of px width (the CKEditor 4 default): breaks image captions *and* is a regression Fixed .

Well, 🐛 CKEditor 5 resizes images with % width instead of px width (the CKEditor 4 default): breaks image captions *and* is a regression Fixed will fix it for all images as soon as they are resized again.

🐛 EditorFileReference should compute a px if a % is specified, even though % is not allowed in HTML5 Needs work would still be appropriate hardening, but I agree there's nothing left to do here (besides, this really does belong in the filter.module component, even though it's typically caused by CKEditor 5).

Agreed with the course of action that @dabley proposed though, and crediting him for it! 😊🙏 One less issue!