[Webkit-unassigned] [Bug 175532] New: Can't scroll an iframe, unless its content is explicitly scrollable with css

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=175532

            Bug ID: 175532
           Summary: Can't scroll an iframe, unless its content is
                    explicitly scrollable with css
           Product: WebKit
           Version: Safari Technology Preview
          Hardware: Macintosh
                OS: macOS 10.12.4
            Status: NEW
          Severity: Major
          Priority: P2
         Component: Frames
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: hello at haroen.me

any iframe (codepen.io, codesandbox.io) that overflows its container, can't be scrolled. The only way around, is to add the following to the styling of the frame:

html {
  height: 100%;
}

body {
  height: 100%;
  overflow: auto;
}

This wasn't the case in earlier Safari versions.

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