@onesy/date/esm/startOf.js

Time and date utils library

import OnesyDate from './OnesyDate';
import remove from './remove';
export default function startOf() {
  let onesyDate_ = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : OnesyDate.onesyDate;
  let unit = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 'day';

  if (onesyDate_ && onesyDate_.valid) {
    const onesyDate = new OnesyDate(onesyDate_);

    switch (unit) {
      case 'second':
        return new OnesyDate(onesyDate.value.setMilliseconds(0));

      case 'minute':
        return new OnesyDate(onesyDate.value.setSeconds(0, 0));

      case 'hour':
        return new OnesyDate(onesyDate.value.setMinutes(0, 0, 0));

      case 'day':
        return new OnesyDate(onesyDate.value.setHours(0, 0, 0, 0));

      case 'week':
        return new OnesyDate(startOf(remove((onesyDate.dayWeek === 0 ? 7 : onesyDate.dayWeek) - 1, 'day', onesyDate), 'day'));

      case 'month':
        return new OnesyDate(new Date(onesyDate.value.setDate(1)).setHours(0, 0, 0, 0));

      case 'year':
        return new OnesyDate(new Date(onesyDate.value.setMonth(0, 1)).setHours(0, 0, 0, 0));

      default:
        break;
    }
  }
}