Function timeWeekday

external/.d3.js:15823–15832

(i)

const unixDays = unixDay.range;

function timeWeekday(i) {
  return timeInterval((date) => {
    date.setDate(date.getDate() - (date.getDay() + 7 - i) % 7);
    date.setHours(0, 0, 0, 0);
  }, (date, step) => {
    date.setDate(date.getDate() + step * 7);
  }, (start, end) => {
    return (end - start - (end.getTimezoneOffset() - start.getTimezoneOffset()) * durationMinute) / durationWeek;
  });
}

const timeSunday = timeWeekday(0);
const timeMonday = timeWeekday(1);