Summary:
CSSOM-View defines a new css property, 'scroll-behavior'. When set to
'smooth', scrolling boxes will be scrolled in a smooth fashion using a
user-agent-defined function.
Implementing this property will enable more fluid scrolling interfaces
consistent with modern UI paradigms without needing to update the
position manually on a frame-by-frame basis in Javascript. In much the
same way as APZ's fling gestures, the fluid scrolling will take over the
scroll position updates when CSSOM methods or navigation set the scroll
position.
Other effects such as smooth-scroll-snapping can be built upon this
property by setting the scroll position for a smooth scrolling box at
the end of a dragging event. This is beneficial to applications such as
the B2G home screen and image carousels.
Bug:
https://bugzilla.mozilla.org/show_bug.cgi?id=1010538
Link to standard:
http://dev.w3.org/csswg/cssom-view/#smooth-scrolling:-the-%27scroll-behavior%27-property
Platform coverage:
Android, Desktop, Firefox OS
This functionality is beneficial on all platforms. The implementation
fits naturally within the APZ classes; however, APZ may not be available
for some time outside of B2G. I would like to gauge the demand for this
functionality outside of B2G to determine if it should be implemented
independently of APZ and land earlier on other platforms.
Estimated or target release:
TBD
Preference behind which this will be implemented:
layout.css.scroll-behavior.enabled
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