Comments (3)
Ooh. Tricky one. To implement this we have two options:
- Dynamically add and remove the class that enables 3d acceleration as elements are detected to be scrollable or not, on startup and dimension change. The disadvantage to doing this is that adding or removing the class will cause a relayout, almost certainly a non-coalescing one because it has to happen after a height read.
- Not adding the acceleration until it becomes time to trigger a scroll. Depending on the way the acceleration is added, this may cause a layout on start of scroll (bad, and something we just managed to get rid of) and will almost certainly cause a flicker as the element moves from being non-accelerated to being accelerated...
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(In this particular case, we could also just not add a scroller if we deem it to be unnecessary...)
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- is my preferred option - the issue you raised could be mitigated via batching them a la FastDom? The classes of active scrollers in the dom could be added/removed at the same time.
- less keen - this could have the potential of janking just as you start scrolling couldn't it?
- This would be equivalent to 1 wouldn't it? But on slightly haphazard / case by case basis...
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Related Issues (20)
- When child is focused, container gets scrolled in DOM as well as _childFocused firing HOT 1
- Implement standard DOM events
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- modify options at runtime (after initialisation)
- Issues in New iPAD iOS Safari HOT 2
- Performance suggestions
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- FT Scroller doesn't work on iOS 9 Beta 2 HOT 1
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