Re: [w3c/pointerlock] MovementX/Y values in coalesced events (#74)

kvnloo left a comment (w3c/pointerlock#74)

One useful invariant for testing would be conservation of movement:

the sum of `movementX/Y` over `getCoalescedEvents()` should equal the movement represented by the parent dispatched event over the same sample interval.

That gives implementations freedom to coalesce while letting applications reconstruct the high-frequency trajectory without introducing or dropping motion.


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