[Webkit-unassigned] [Bug 205274] New: MSE runtime issue on iPadOS

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=205274

            Bug ID: 205274
           Summary: MSE runtime issue on iPadOS
           Product: WebKit
           Version: Safari 13
          Hardware: iPhone / iPad
                OS: iOS 13
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Media
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: ymichel.k at gmail.com

OVERVIEW

MSE does not seem available (partially) on iPadOS. Below further information about the steps to reproduce.

USER-AGENT:

Mozilla/5.0 (iPad; CPU OS 13_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.0.4 Mobile/15E148 Safari/604.1

SCENARIO:

- I'm remote-debugging Media Source Extension support on a Safari/iPadOS blank page
- On my desktop, I open Safari devtools/console to start dealing with this page
- The page is loaded and I dump "window.MediaSource" in the console, it returns "undefined"
- The exact same page is reloaded and now it returns "function MediaSource() { [native code] }"

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