RESOLVED DUPLICATE of bug 229737 231944
Use of window.alert is not allowed in different origin-domain frames despite `allow-same-origin` and `allow-modals` 
https://bugs.webkit.org/show_bug.cgi?id=231944
Summary Use of window.alert is not allowed in different origin-domain frames despite ...
yanahij531
Reported 2021-10-19 03:29:55 PDT
Created attachment 441706 [details] Video recording of error on safari 15 Please try visiting this URL in Safari 15: https://safari-15-cross-domain-iframe-modal-bug.glitch.me/ The page has a cross-domain iframe in it: ``` <iframe src="https://safari-15-cross-domain-iframe-modal-bug-embed.glitch.me" sandbox="allow-scripts allow-same-origin allow-modals"></iframe> ``` And the source code for that iframe embed is just: ``` <script>alert(1)</script> ``` Since I've added `sandbox="allow-scripts allow-same-origin allow-modals"` to the iframe, I believe the modals should be allowed. Instead the following error is shown in the console: ``` Use of window.alert is not allowed in different origin-domain frames ``` The other major browsers correctly allow the modal with those attributes, and this behavior of allowing modals with those sandbox flags is discussed here: https://github.com/whatwg/html/issues/5407#issuecomment-775621443 This bug does not exist on Safari 13 or 14. Please see attached video recording.
Attachments
Video recording of error on safari 15 (2.14 MB, video/webm)
2021-10-19 03:29 PDT, yanahij531 		no flags
Details
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Chris Dumez
Comment 1 2021-10-19 07:39:02 PDT
*** This bug has been marked as a duplicate of bug 229737 ***
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