[wp-trac] [WordPress Trac] #53675: Omit lazy-loading attribute on first content image/iframe

[WordPress Trac]

#53675: Omit lazy-loading attribute on first content image/iframe
--------------------------------------+--------------------------
 Reporter:  flixos90                  |       Owner:  flixos90
     Type:  enhancement               |      Status:  assigned
 Priority:  normal                    |   Milestone:  5.9
Component:  Media                     |     Version:  5.5
 Severity:  normal                    |  Resolution:
 Keywords:  has-patch has-unit-tests  |     Focuses:  performance
--------------------------------------+--------------------------

Comment (by flixos90):

 @azaozz @westonruter Would you mind reviewing / testing the PR
 https://github.com/WordPress/wordpress-develop/pull/1580?

 Replying to [comment:6 westonruter]:
 > What if someone is adding an image to the template outside of
 `the_content()` and `the_post_thumbnail()`? They could also obtain an
 image via `wp_get_attachment_image()` directly. Since that function
 applies the `wp_lazy_loading_enabled` filter, perhaps the filter should
 increment the counter instead of in the `post_thumbnail_html` and
 `wp_img_tag_add_loading_attr` filters both?

 This question may now be slightly off in relation to the core
 implementation, however I wanna address the point of considering manually
 placed images via `wp_get_attachment_image()`. It may be worth thinking
 about this, but so far I'm thinking that the use-case of manually rendered
 images within the content is too insignificant, plus themes may use this
 to e.g. render small icon-like images etc., considering which here would
 be rather counter-productive. Of course the post content could also
 contain such tiny icon-like images as the first elements, but I think
 that's a lot less likely.

 I think relying on only featured images and in-content images is more
 reliable here.

-- 
Ticket URL: <https://core.trac.wordpress.org/ticket/53675#comment:8>
WordPress Trac <https://core.trac.wordpress.org/>
WordPress publishing platform