[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:  (none)
     Type:  feature request             |      Status:  new
 Priority:  normal                      |   Milestone:  Awaiting Review
Component:  Media                       |     Version:
 Severity:  normal                      |  Resolution:
 Keywords:  needs-unit-tests has-patch  |     Focuses:  performance
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Changes (by spacedmonkey):

 * keywords:  needs-patch needs-unit-tests => needs-unit-tests has-patch


Comment:

 As a talking point, I have uploaded a first patch to this ticket. This
 uses a new feature flag. To enable lazy loading images, simply add theme
 support for `lazy-loading-images`. This is something I discussed with
 @joemcgill .

 The function is designed to be easily to lazy loading to iframes later as
 well.

 I don't personally believe we need a javascript shim here for backwards
 compability. We don't do this with srcsets correctly.

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Ticket URL: <https://core.trac.wordpress.org/ticket/44427#comment:30>
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