[Webkit-unassigned] [Bug 227829] New: Running WAAPI animations prevent any form checkbox or button to be clicked

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=227829

            Bug ID: 227829
           Summary: Running WAAPI animations prevent any form checkbox or
                    button to be clicked
           Product: WebKit
           Version: Safari 14
          Hardware: iPhone / iPad
                OS: iOS 14
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Animations
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: mic.gallego at gmail.com
                CC: dino at apple.com, graouts at apple.com

Hi,

I found an annoying issue when trying to run animations in parallel with a staggering delay. Until all items are rendered, Safari on iOS (not reproducible on Mac nor any other browser I have tried) will make the click on input elements (such as input) or button completely inopperant, forcing the user to wait before being able to safely interact with forms.

This behavior can be tried here on iOS 14.6: https://jsfiddle.net/s1qavy8j/7/show

If you try to quickly click on the input you will see that nearly 80% of the time, the click is not taken into account and the checkbox does not change. After all the animations are done after a few seconds, the proper behavior is restored.

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