[Webkit-unassigned] [Bug 150715] New: Excessive zoom applied to Bootstrap v3 modal (new iOS 9 breakage)

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=150715

            Bug ID: 150715
           Summary: Excessive zoom applied to Bootstrap v3 modal (new iOS
                    9 breakage)
    Classification: Unclassified
           Product: WebKit
           Version: Safari 9
          Hardware: iOS
                OS: iOS 9.0
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: CSS
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: webkit at chrisrebert.com

Steps to reproduce:
1. Open http://output.jsbin.com/sagowo in iOS 9 Safari.
2. Tap the blue button to make the Bootstrap modal dialog appear.

Actual result:
In iOS 9, some kind of automatic zooming kicks in and the page gets *way* too zoomed in
(e.g. an <input> takes up ~1/4th of the vertical space of the viewport),
and there's no way to zoom out, even though user-scalable=no has NOT been specified.

Expected result:
Either no extra zoom or a reasonable amount of zoom should be applied.

Other notes:
This used to work fine in iOS 8.4.
iOS 9 has caused this to break somehow.

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