[Webkit-unassigned] [Bug 188136] New: Keyboard dismissal zooms screen unnecessarily on iOS 12 Developer Beta 3 & 4

Sat Jul 28 08:00:19 PDT 2018

https://bugs.webkit.org/show_bug.cgi?id=188136

            Bug ID: 188136
           Summary: Keyboard dismissal zooms screen unnecessarily on iOS
                    12 Developer Beta 3 & 4
           Product: WebKit
           Version: Safari Technology Preview
          Hardware: iPhone / iPad
                OS: Other
            Status: NEW
          Severity: Major
          Priority: P2
         Component: Forms
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: searls at gmail.com
                CC: cdumez at apple.com, wenson_hsieh at apple.com

When dismissing the keyboard (either by tapping Done, Enter/Return, or tapping outside the keyboard area), Safari will zoom the page. This started in iOS 12 Developer Beta 3 and persisting through Beta 4

Steps to Reproduce:

1. Watch this video to see what I'm describing:
https://youtu.be/fjqv8_gBs-0

2. Load this HTML in Safari and attempt to reproduce: 

```
<head>
  <style>
    body { border: 4px solid red; }

    input {
      margin-top: 40vh;
      font-size: 64px;
    }
  </style>
</head>
<body>
  <input placeholder="Tap this & then tap Done"/>
</body>
```

Expected Results:

iOS 11 and iOS 12 to behave the same.

Actual Results:

iOS 12 zooms the viewport

iOS Build: 16A5327f

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