[Webkit-unassigned] [Bug 218860] Events delivered when all event listeners in the ancestor chain are passive should be cancelable=false

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=218860

--- Comment #7 from Simon Fraser (smfr) <simon.fraser at apple.com> ---
Looking at blink code, it appears (for touch events at least) to set the event to non-cancelable if all the event listeners in the ancestor chain of the target element have passive listeners. My testing suggests that the same is true for wheel event listeners.

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