215375 2020-08-11 08:44:33 -0700 Inserting image with srcset into dynamically created iframe results in invisible image 2026-04-02 11:45:46 -0700 1 1 1 Unclassified WebKit Images Safari 13 Unspecified Unspecified RESOLVED FIXED https://github.com/web-platform-tests/wpt/pull/58959 BrowserCompat, InRadar P2 Normal --- 1 vepomoc ahmad.saleem792 ahmad.saleem792 koivisto sabouhallawa simon.fraser webkit-bug-importer zalan oldest_to_newest 1679402 0 vepomoc 2020-08-11 08:44:33 -0700 Demo of the bug: https://jsfiddle.net/6Le9nwx7/ Inserting image with [srcset] attribute into dynamically created iframe results in the image that has its natural dimensions set to 0, therefore – it's not visible. Tested on Safari 13.1.2 (15609.3.5.1.3). 1679464 1 webkit-bug-importer 2020-08-11 10:53:27 -0700 <rdar://problem/66849050> 1679473 2 simon.fraser 2020-08-11 11:14:30 -0700 Chrome also says 0x0. Firefox gives a size. 1679651 3 sabouhallawa 2020-08-11 16:44:52 -0700 (In reply to Simon Fraser (smfr) from comment #2) > Chrome also says 0x0. Firefox gives a size. This happens because the 'sizes' attribute is missing from the <img> tag. So in HTMLImageElement::selectImageSource(), we end up having sourceSize = 0. And in pickBestImageCandidate(), we do this calculation: candidate.density = static_cast<float>(candidate.resourceWidth) / sourceSize; but because sourceSize = 0, we calculate candidate.density = +inf. And in HTMLImageElement::setBestFitURLAndDPRFromImageCandidate(), we do this calculation: m_imageDevicePixelRatio = 1 / candidate.density; So we end up having m_imageDevicePixelRatio = 0. And this is why HTMLImageElement::naturalWidth() returns zero. 1945914 4 ahmad.saleem792 2023-03-31 22:47:04 -0700 (In reply to Comandeer from comment #0) > Demo of the bug: https://jsfiddle.net/6Le9nwx7/ > > Inserting image with [srcset] attribute into dynamically created iframe > results in the image that has its natural dimensions set to 0, therefore – > it's not visible. > > Tested on Safari 13.1.2 (15609.3.5.1.3). Firefox Nightly 113: 300x372 Chrome Canary 113: 300x372 Safari Technology Preview 166: 0x0 2196168 5 ahmad.saleem792 2026-04-01 23:08:36 -0700 Pull request: https://github.com/WebKit/WebKit/pull/61886 2196325 6 ews-feeder 2026-04-02 10:03:02 -0700 Committed 310446@main (088193491341): <https://commits.webkit.org/310446@main> Reviewed commits have been landed. Closing PR #61886 and removing active labels. 2196353 7 ahmad.saleem792 2026-04-02 11:45:46 -0700 Submitted web-platform-tests pull request: https://github.com/web-platform-tests/wpt/pull/58959