Function addTime

src/ui-react-dom-charts/common/wilkinson.ts:335–344

(timestamp: number, [unit, step]: TimeInterval)

};

const addTime = (timestamp: number, [unit, step]: TimeInterval): number => {
  const date = dateNew(timestamp);
  return unit == YEAR_UNIT
    ? dateUtc(dateGetUTCFullYear(date) + step, 0, 1)
    : unit == QUARTER_UNIT
      ? dateUtc(dateGetUTCFullYear(date), dateGetUTCMonth(date) + step * 3, 1)
      : unit == MONTH_UNIT
        ? dateUtc(dateGetUTCFullYear(date), dateGetUTCMonth(date) + step, 1)
        : timestamp + getFixedInterval(unit, step);
};

const getFixedInterval = (unit: TimeUnit, step: number): number =>
  unit == WEEK_UNIT