NEW186622
documentElement clientHeight does not include safe-area 
https://bugs.webkit.org/show_bug.cgi?id=186622
Summary documentElement clientHeight does not include safe-area
Darryl Pogue
Reported 2018-06-14 10:08:24 PDT
On an iPhone X running iOS 11.4 with a full-screen WKWebView and viewport-fit=cover, `document.documentElement.clientHeight` returns 734. The actual screen height (as reported by `screen.availHeight`) is 812. If viewport-fit=cover is specified, I would expect the clientHeight to be the full height of the screen, without subtracting the safe-area insets (since they are not being applied due to the viewport directive). This is also occurring in iOS 12.0 beta 1.
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