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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - Same-origin iframe'`postMessage` has wrong `event.source`."
href="https://bugs.webkit.org/show_bug.cgi?id=163412#c1">Comment # 1</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - Same-origin iframe'`postMessage` has wrong `event.source`."
href="https://bugs.webkit.org/show_bug.cgi?id=163412">bug 163412</a>
from <span class="vcard"><a class="email" href="mailto:lee.wang.zhong+wk@gmail.com" title="lee.wang.zhong+wk@gmail.com">lee.wang.zhong+wk@gmail.com</a>
</span></b>
<pre>[Sorry, early send.]
On iOS 10 Safari, a `postMessage` from an iframe with the same origin as the parent window results in a MessageEvent with the `.source` property set to the parent window. It should be set to the window of the message source.
This is a behavior change from iOS 9.
P.S.: Because `.source` is scrubbed, if the parent has two child frames with the parent's origin, there's no data on the event object which could distinguish one frame's messages from the other's.</pre>
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