srcset max-width set to image width

[mikedunn]

My understanding is the max-width value in the image srcset should be limited to 1600px, however it is actually always set to the width of the original image. Also, max_srcset_image_width does not appear to be properly setting the max-width value either.

Thanks,
Mike

[sabernhardt]

Hi and thanks for the ticket!

I'm setting the component to Media for better visibility.

It's worth noting that the max-width value can be filtered using wp_calculate_image_sizes for content images (or wp_get_attachment_image_attributes for featured images). See Twenty Sixteen theme for an example.

Also, since WordPress 5.3, original images (JPEGs) can be scaled when uploaded. The default maximum dimension is 2560px, and the ​big_image_size_threshold filter can adjust that value.