[Webkit-unassigned] [Bug 237703] Native image Lazyloading sometimes doesn’t load

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Mon May 2 05:54:16 PDT 2022


https://bugs.webkit.org/show_bug.cgi?id=237703

Martin Schön <martin.schoen at spiegel.de> changed:

           What    |Removed                     |Added
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                 CC|                            |martin.schoen at spiegel.de

--- Comment #3 from Martin Schön <martin.schoen at spiegel.de> ---
I can confirm that there is a connection between having an initial placeholder value for src and images not appearing. On our site https://www.spiegel.de, we use data URIs with encoded SVGs as placeholder `src` values for not-yet-loaded images. Once we remove either the loading="lazy" attribute or the default src, images appear correctly again.

We noted that the issue only occurs, if the images are not in the browser's cache.

Also, we use srcset/sizes to load different image variants per screen width. When the window with the loaded page is resized so the viewport matches a different variant, the image appears.

The issue occurs on Safari for Mac 15.4 (Mac OS 12.0.1) and on Safari Technology Previews 143 and higher (all STP versions that include native image lazyloading).

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