[Webkit-unassigned] [Bug 222578] New: srcset in <picture> in iframe no longer work

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=222578

            Bug ID: 222578
           Summary: srcset in <picture> in iframe no longer work
           Product: WebKit
           Version: Safari Technology Preview
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: CSS
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: simon.fraser at apple.com

<picture> tags that are appended to the DOM by JS do not seem to have the ability to have their img source value change when changing the viewport if the <picture> tag is within an <iframe>. This causes the rendered image to potentially use the wrong src if a user changes their viewport size.

A reduction for this bug can be found here: https://codepen.io/chrisyz/pen/NWbMbyb

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