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Mixing cross-origin and same-origin postMessage() #3558

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annevk opened this issue Mar 12, 2018 · 0 comments
Open

Mixing cross-origin and same-origin postMessage() #3558

annevk opened this issue Mar 12, 2018 · 0 comments
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topic: serialize and transfer

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@annevk
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annevk commented Mar 12, 2018

https://github.com/w3c/web-platform-tests/pull/9952/files is an interesting case we should perhaps offer some advice on in the specification. In that if you have some postMessage()-based protocol, you cannot rely on the replies coming in some order if you communicate with multiple sites, due to out-of-process <iframe>.
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