toIso8601String method

String toIso8601String()

Returns an ISO-8601 full-precision extended format representation.

The format is yyyy-MM-ddTHH:mm:ss.mmmuuuZ for UTC time, and yyyy-MM-ddTHH:mm:ss.mmmuuu (no trailing 'Z') for local/non-UTC time, where:

• yyyy is a, possibly negative, four digit representation of the year, if the year is in the range -9999 to 9999, otherwise it is a signed six digit representation of the year.
• MM is the month in the range 01 to 12,
• dd is the day of the month in the range 01 to 31,
• HH are hours in the range 00 to 23,
• mm are minutes in the range 00 to 59,
• ss are seconds in the range 00 to 59 (no leap seconds),
• mmm are milliseconds in the range 000 to 999, and
• uuu are microseconds in the range 001 to 999. If microsecond equals 0, then this part is omitted.

The resulting string can be parsed back using parse.

Implementation

String toIso8601String() {
  var y =
      (year >= -9999 && year <= 9999) ? _fourDigits(year) : _sixDigits(year);
  var m = _twoDigits(month);
  var d = _twoDigits(day);
  var h = _twoDigits(hour);
  var min = _twoDigits(minute);
  var sec = _twoDigits(second);
  var ms = _threeDigits(millisecond);
  var us = microsecond == 0 ? '' : _threeDigits(microsecond);
  if (isUtc) {
    return '$y-$m-${d}T$h:$min:$sec.$ms${us}Z';
  } else {
    return '$y-$m-${d}T$h:$min:$sec.$ms$us';
  }
}