[Webkit-unassigned] [Bug 200227] New: Issue with the way vh is handled inside an iFrame on iOS mobile devices

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=200227

            Bug ID: 200227
           Summary: Issue with the way vh is handled inside an iFrame on
                    iOS mobile devices
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: iPhone / iPad
                OS: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Frames
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: ASwamy at esri.com

When in an iframe on iOS, vh is not based off of the iframe's viewport height, but rather off of the height of all of the content inside of the iframe. This puts a major limitation on my use of vh and is a totally broken implementation of vh when embedded on iOS.

Here is a codepen link which demonstrates the above mentioned problem - https://codepen.io/anumysore5/pen/WqqYOG. The link to the codepen that is embedded is https://codepen.io/anumysore5/pen/BXLLrm. The issue is easily noticeable when the length of the content below the very first div inside the embedded codepen is increased. The height of the div increases with the increase in the length of the content.

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