@dunn.dev/reference v0.11.0

A minor. Marks switch on scroll and draw in time.
  The talk chrome no longer settles a figure after scroll stops. Scroll
  picks each mark's state; time draws it, --dur-mark-fade 280ms and
  --dur-mark-draw 480ms on --ease-mark. --dur-settle is gone. Readouts,
  notes and lamps change at the mark they describe: a stepping readout
  at that mark's --a, an interpolating one through the chrome's drawn().
  Lamps read the unrounded fig.