ScrollView: momentum scroll events

[necolas]

Look into supporting momentum scroll events.

[kristerkari]

I guess that to add support for the scroll momentum callbacks there needs to be a way to detect if the scroll is done with momentum.

You could always check for the scroll speed, but that is not really the same thing as you call do a scroll movement fast without it having momentum.

Is anyone aware of any existing Javascript implementations where such gesture would be detected?

[necolas]

My initial thought is that if a scroll is initiated by a touch, and scroll events are still firing while there is no active touch, we're in a "momentum" phase of the scroll. I don't think momentum events can exist for mouse/wheel-triggered scrolls. And the drag start event would fire when touch-scrolling starts, and drag end would fire when touch-scrolling ends. But would have to check when the events fire for native to confirm.

[MoOx]

I don't think momentum events can exist for mouse/wheel-triggered scrolls

At least on macos with a trackpad you can experience them in all browsers.

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Might this help to finish touchable support as some issues with those might be related to some missing events (eg: for scroll responder?)

[RichardLindhout]

https://css-tricks.com/snippets/css/momentum-scrolling-on-ios-overflow-elements/

[zxymgl]

me too