lib/src/DateUtils.js
function addDayToRange(day) {
  var range = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : { from: null, to: null };
  var from = range.from,
      to = range.to;

  if (!from) {
    from = day;
  } else if (from && to && isSameDay(from, to) && isSameDay(day, from)) {
    from = null;
    to = null;
  } else if (to && isDayBefore(day, from)) {
    from = day;
  } else if (to && isSameDay(day, to)) {
    from = day;
    to = day;
  } else {
    to = day;
    if (isDayBefore(to, from)) {
      to = from;
      from = day;
    }
  }

  return { from: from, to: to };
}
function addDayToRange(day) {
  var range = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : { from: null, to: null };
  var from = range.from,
      to = range.to;

  if (!from) {
    from = day;
  } else if (from && to && isSameDay(from, to) && isSameDay(day, from)) {
    from = null;
    to = null;
  } else if (to && isDayBefore(day, from)) {
    from = day;
  } else if (to && isSameDay(day, to)) {
    from = day;
    to = day;
  } else {
    to = day;
    if (isDayBefore(to, from)) {
      to = from;
      from = day;
    }
  }

  return { from: from, to: to };
}
function addDayToRange ( day ) { var range = arguments . length > 1 && arguments [ 1 ] !== undefined ? arguments [ 1 ] : { from : null , to : null } ; var from = range . from , to = range . to ; if ( ! from ) { from = day ; } else if ( from && to && isSameDay ( from , to ) && isSameDay ( day , from ) ) { from = null ; to = null ; } else if ( to && isDayBefore ( day , from ) ) { from = day ; } else if ( to && isSameDay ( day , to ) ) { from = day ; to = day ; } else { to = day ; if ( isDayBefore ( to , from ) ) { to = from ; from = day ; } } return { from : from , to : to } ; }
Add a day to a range and return a new range. A range is an object with
`from` and `to` days.

@export
@param {Date} day
@param {Object} range
@return {Object} Returns a new range object
Add a day to a range and return a new range . A range is an object with from and to days .