components/date-picker/months.js
function scrollSpeed(date) {
  const monthStart = moment(date).startOf('month');
  const monthEnd = moment(date).endOf('month');
  return (monthEnd - monthStart) / monthHeight(monthStart);
}
function scrollSpeed(date) {
  const monthStart = moment(date).startOf('month');
  const monthEnd = moment(date).endOf('month');
  return (monthEnd - monthStart) / monthHeight(monthStart);
}
function scrollSpeed ( date ) { const monthStart = moment ( date ) . startOf ( 'month' ) ; const monthEnd = moment ( date ) . endOf ( 'month' ) ; return ( monthEnd - monthStart ) / monthHeight ( monthStart ) ; }
in milliseconds per pixel
in milliseconds per pixel