Bug 223021 depends on 3 bugs:

•    223021: CSS scroll snap should allow scrolling to the middle of snap areas that overflow the snapport [RESOLVED FIXED; assigned to mrobinson]
  •    223986: Expose an alias for ScrollSnapOffsetInfo<T> to make it easier to use [RESOLVED FIXED; assigned to mrobinson]
  •    224326: [css-scroll-snap] Compute proximity information while snapping [RESOLVED FIXED; assigned to mrobinson]
  •    227062: [css-scroll-snap] Simplify snap point selection helpers [RESOLVED FIXED; assigned to mrobinson]

Bug 223021 blocks one bug:

•    223021: CSS scroll snap should allow scrolling to the middle of snap areas that overflow the snapport [RESOLVED FIXED; assigned to mrobinson]
  •    218115: CSS scroll-snap web compatibility issues [NEW; assigned to webkit-unassigned]