[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):

 I made some key changes in
 [https://core.trac.wordpress.org/attachment/ticket/44427/44427.6.diff
 44427.6.diff]

 - Added filter to `widget_text_content` ( Props @westonruter )
 - Refactored logic so that all html is change by adding the
 `wp_lazy_load_content_media` filter.
 - Added `$content` to `wp_lazy_load_content_media` filter for better
 context.
 - Added `smilies_html` filter.
 - Added `wp_get_attachment_image` filter.

 I know it more expensive ( from a compute standard point ) to run the
 regex in all these places, how, I think the added control for developers
 to be able to unhook these filters, is a great trade off.

 Adding a filter to `wp_get_attachment_image` also fixes
 [https://core.trac.wordpress.org/ticket/27399 #27399].

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Ticket URL: <https://core.trac.wordpress.org/ticket/44427#comment:53>
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