Dart: DateTime.parse() not including microseconds

Question

See the following code:

void main() 
{
  String test = '2017-10-11T12:03:46.351363-04:00';
  DateTime testDate = DateTime.parse(test);
  print(testDate.microsecond);
  print(testDate.toString());
}

When running this code I lose the microseconds in the string that I parse. Why is this and is there anyway to solve this?

The Dart docs say that the parse method supports microseconds.

Answer 1

'2017-10-11T12:03:46.351363-04:00' is not a format Dart's DateTime can handle.

DateTime only supports Z for GMT or no Z for local time.

Just print the value from a created DateTime to see what format it can parse.

print(DateTime.now());
print(DateTime.now().toUtc())

DateTime has also 2 constructors fromMicrosecondsSinceEpoch and fromMillisecondsSinceEpoch to create an instance from an integer value.

Answer 2

There's an issue here https://github.com/dart-lang/co19/issues/17

As the test show it only 6 decimal places https://github.com/dart-lang/co19/commit/8465825f60c9580d82ae01ffc040f3b589aaf667#diff-02c526d1dcb5aa2dcdab3500c14ede87R40

You can parse format 2018-12-11T12:00:32.304272Z

but cannot parse 2018-12-11T12:00:32.304272001Z

Answer 3

I found an issue for dart-lang/sdk. https://github.com/dart-lang/sdk/issues/44876

The web Date object doesn't support microseconds. It's implemented using the JavaScript Date object which only supports millisecond precision. So, working as well as possible.