Scrolling does not contribute to engaged time on mobile devices

[britice]

PR #1818 was intended to capture overall engagement with articles by users across any viewing platform. One action which should contribute to a measure of user engagement is the 'scroll' event.

A scroll event listener is being registered by the Activity service in an attempt to include that activity in the engaged time measurement. However, in testing in mobile devices since the feature was released, scrolling in the device does not contribute to engaged time.

[britice]

I think I figured it out already. The scroll event listener is being registered on document.documentElement rather than on the document. I'll need to modify how this is being set up.

[cramforce]

@britice use viewer.onScroll. That will give you scroll events independent of our various platform specific scrolling implementations.

[britice]

Oh perfect.

[britice]

@cramforce, did you mean viewport.onScroll instead of viewer.onScroll? I don't see that method available on the Viewer class.

Or were you suggesting to use viewer.onViewportEvent?

[cramforce]

Sorry, viewport is correct.

On Tue, Feb 23, 2016 at 10:10 AM, Brian Tice notifications@github.com
wrote:

@cramforce https://github.com/cramforce, did you mean viewport.onScroll
instead of viewer.onScroll? I don't see that method available on the
Viewer class.

Or were you suggesting to use viewer.onViewportEvent?

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[ericlindley-g]

Closing, as this looks like it's resolved, but @britice, please feel free to reopen if there are any outstanding issues/questions!