[Webkit-unassigned] [Bug 256566] New: Inconsistent full screen behaviour between video and element

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=256566

            Bug ID: 256566
           Summary: Inconsistent full screen behaviour between video and
                    element
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Media
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: jean-yves.avenard at apple.com

Consider the following test file:
https://jyavenard.github.io/htmltests/tests/mse_mp4/bipbop_fullscreen.html

The page has a video element within a <div></div>

It has two buttons, one will call requestFullscreen() on the video element, the other on the div parent element instead.

STR: 
On an iPad:
1- Load the page https://jyavenard.github.io/htmltests/tests/mse_mp4/bipbop_fullscreen.html
2- click on the button "video fullscreen"
3- now press the PiP button in the top left corner
4- tap on the "video fullscreen button again"

Now, notice that after step 2, no banner "jyavenard.github.io is in fullscreen is shown"
and step 4 does nothing.

Now we repeat the above steps, but this time with the "Div fullscreen" button
5- Load the page https://jyavenard.github.io/htmltests/tests/mse_mp4/bipbop_fullscreen.html
6- click on the button "video fullscreen"
7- now press the PiP button in the top left corner
8- tap on the "video fullscreen button again"

Now, notice that after step 6, the banner "jyavenard.github.io is in fullscreen" is shown
and step 8 the element goes to full screen.

>From a user perspective, the end result is the same: the video plays in full screen. However, depending on which element the JS called to go into fullscreen, there are subtle differences that I believe shouldn't exist.

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