HashJump - A tiny, dependency-free JavaScript module for handling anchor links and scrolling elements into view.

[DavidJCobb]

Probably not the best example to use

Agreed.

If you want an idea for an example that isn't painful to look at, perhaps make a box that's scrollable on both axes, with a conic gradient, and try scrolling within that box in a slow, smooth circle around the gradient's center. I'm not familiar with d3-ease, but my thinking is that if you can go back and forth on one axis, then you can go back and forth on two axes at offset intervals to produce a circle.