[wp-trac] [WordPress Trac] #61847: Auto Sizes for Lazy-loaded Images

[WordPress Trac]

#61847: Auto Sizes for Lazy-loaded Images
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 Reporter:  mukesh27                         |       Owner:  joemcgill
     Type:  enhancement                      |      Status:  closed
 Priority:  normal                           |   Milestone:  6.7
Component:  Media                            |     Version:
 Severity:  normal                           |  Resolution:  fixed
 Keywords:  has-patch has-unit-tests commit  |     Focuses:  performance
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Changes (by joemcgill):

 * status:  reviewing => closed
 * resolution:   => fixed


Comment:

 In [changeset:"59008" 59008]:
 {{{
 #!CommitTicketReference repository="" revision="59008"
 Media: Add auto sizes for lazy-loaded images.

 This implements the HTML spec for applying auto sizes to lazy-loaded
 images by prepending `auto` to the `sizes` attribute generated by
 WordPress if the image has a `loading` attribute set to `lazy`. For
 browser that support this HTML spec, the image's size value will be set to
 the concrete object size of the image. For browsers that don't support the
 spec, the word "auto" will be ignored when parsing the sizes value.

 References:
 - https://html.spec.whatwg.org/multipage/images.html#sizes-attributes
 - https://github.com/whatwg/html/pull/8008

 Props mukesh27, flixos90, joemcgill, westonruter, peterwilsoncc.
 Fixes #61847.
 }}}

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Ticket URL: <https://core.trac.wordpress.org/ticket/61847#comment:27>
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