[wp-trac] [WordPress Trac] #44427: Introduce lazy-loading API for media and other elements

[WordPress Trac]

#44427: Introduce lazy-loading API for media and other elements
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 Reporter:  mor10                     |       Owner:  flixos90
     Type:  feature request           |      Status:  assigned
 Priority:  normal                    |   Milestone:  5.4
Component:  Media                     |     Version:
 Severity:  normal                    |  Resolution:
 Keywords:  has-patch has-unit-tests  |     Focuses:  performance
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Comment (by spacedmonkey):

 Another filter we may want to think about implement lazying loading in is
 the header image that uses `get_header_image_tag`. In 99% of case, this
 image will be loaded first on the page, making adding the filter a little
 pointless. But maybe worth it for the sack of completeness.

 I also reviewed the `get_custom_logo` function, but this seems to use
 `wp_get_attachment_image`, which is already filtered.

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Ticket URL: <https://core.trac.wordpress.org/ticket/44427#comment:54>
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