[Webkit-unassigned] [Bug 162512] window.postMessage error with iframe and file:// protocol

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=162512

--- Comment #6 from Pier Bover <pierbover11 at gmail.com> ---
Hey Brady

There is at least another bug that I know of which might be related to this one.
https://bugs.webkit.org/show_bug.cgi?id=154916

People are stumbling on this because they are using Cordova but the problem is really in WKWebView. When replacing WKWebView with UIWebView the problem disappears, alas UIWebView is too outdated.

In my original report from a year ago I included both the HTML files necessary to reproduce the bug, the Cordova project in the repo, and the steps to start the Simulator. The Xcode project is also there as you can see in the Github link, although if you are not familiar with Cordova I understand this might have been not clear.

https://github.com/PierBover/cordova-wkwebview-iframe-bug/tree/master/cordova/platforms/ios

Here is the bug reproduced when running the simulator with iOS 10.2. I just made that screenshot in a new project I'm working on.
http://imgur.com/B5I1j7e.jpg

In that project I need to open HTMLs in an iframe and sometimes randomly the webview refreshes itself when creating the element in the DOM. I suspect this is also related to the same problem although I don't have a reproducible case yet.

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