[Webkit-unassigned] [Bug 163244] New: [iOS] REGRESSION (r197953): User gesture required to load video in iOS 9-built apps

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=163244

            Bug ID: 163244
           Summary: [iOS] REGRESSION (r197953): User gesture required to
                    load video in iOS 9-built apps
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Local Build
          Hardware: iPhone / iPad
                OS: iOS 10
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebCore Misc.
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: dbates at webkit.org
                CC: eric.carlson at apple.com, jer.noble at apple.com,
                    jonlee at apple.com

Following <https://trac.webkit.org/changeset/197953> (bug #155141), videos require a user gesture to load on iOS. Among other implications of this change, we dispatch a DOM loadedmetadata event at a <video> event only if a human being initiated playback of the video. This changes makes iOS more closely align with the behavior on macOS. However it is represents a backward incompatible change from the behavior in iOS 9 and earlier. We should only enable this behavioral change for apps built against iOS 10 or later.

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