Content with class noexcerpt is stripped from content

https://m.mediawiki.org/wiki/Extension:Popups#How_can_I_remove_content_from_a_page_preview?

Is this what you mean?

In T317216#8219372, @Jdlrobson wrote:

Content with class noexcerpt is stripped from content

https://m.mediawiki.org/wiki/Extension:Popups#How_can_I_remove_content_from_a_page_preview?

Is this what you mean?

This sounds good. Thank you for pointing it out. However, this class is non-standard and not recognized by search engines, screen readers and other software.

Understood. Unfortunately most of this content comes from editors and templates so we have little control over changing these to aside. We'd have to edit every single template across all our projects. Momentum for this would most likely need to come from editors moving in that direction.

Is marking up content such as date of birth in brackets an appropriate use of aside? The spec seems to suggest not ("It's not appropriate to use the aside element just for parentheticals, since those are part of the main flow of the document")

Regarding the preview image, that's a different concern together with a whole host of complexity. See https://m.mediawiki.org/wiki/Special:MyLanguage/Extension:PageImages#Image_choice for information on that subject.

This needs discussion on wiki. It's not something page previews itself can address.