[Webkit-unassigned] [Bug 254861] iPadOS: Viewport doesn't correctly restore after dismissing software keyboard for installed web apps

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=254861

philipp.pirrung+apple at softwarehelden.com changed:

           What    |Removed                     |Added
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                 CC|                            |philipp.pirrung+apple at softw
                   |                            |arehelden.com

--- Comment #3 from philipp.pirrung+apple at softwarehelden.com ---
I can confirm that this issue exists on iPad Pro (11-inch) (3rd generation) with iPadOS 16.3.1.

Furthermore I was able to work around this behaviour with the following:
window.visualViewport.addEventListener("resize", () => {
    window.requestAnimationFrame(() => {
        if (window.visualViewport.height == document.documentElement.getBoundingClientRect().height) {
            document.documentElement.scrollTop = 0;
        }
    });
});

It seems that setting the scrollTop after the resize has finished, updates the visualViewport. Checking if the height of the visualViewport matches the height of the document ensures that the scrollTop is only "updated" when the full screen is available again (i.e. the keyboard has been dismissed).
While I'm in no way happy with this work-around, it seems to fix the originally described behaviour in all use-cases I've tested.

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