[wp-trac] [WordPress Trac] #58681: No lazy loading attribute on images in gallery

[WordPress Trac]

#58681: No lazy loading attribute on images in gallery
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 Reporter:  spacedmonkey  |       Owner:  flixos90
     Type:  defect (bug)  |      Status:  assigned
 Priority:  normal        |   Milestone:  6.4
Component:  Media         |     Version:  5.5
 Severity:  normal        |  Resolution:
 Keywords:  2nd-opinion   |     Focuses:  performance
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Comment (by joemcgill):

 Thanks @flixos90. I've been looking into this today and came to the same
 conclusion as you just described above. The shortcodes are always being
 processed after content images are filtered by `wp_filter_content_tags`.
 Previously, dynamic images created as part of the content were always
 having `lazy` applied, which had it's own problems, as you described.

 I'm curious if something like [https://github.com/WordPress/wordpress-
 develop/pull/4799#issuecomment-1622614659 PR #4799] would be a simple
 workaround for shortcodes? Generally, I think finding a way of processing
 all content images at once, regardless of how they're created, would be
 the most robust strategy, since currently we can't determine the order in
 which a dynamic image added via a shortcode will fall in the markup when
 compared with image blocks or classic editor content.

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Ticket URL: <https://core.trac.wordpress.org/ticket/58681#comment:16>
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