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prefer-date-format

added in: 1.7.0
warning
🛠

Warns when DateTime, values are formatted with toString instead of DateFormat.format().

Example​

❌ Bad:

void main() {
  final DateTime dateTimeValue = DateTime.now();

  final dateTimeString = dateTimeValue.toString(); // LINT
  final dateTimeString = '$dateTimeValue'; // LINT
}

✅ Good:

void main() {
  final DateTime dateTimeValue = DateTime.now();

  final dateTimeString = DateFormat().format(dateTimeValue);
  final dateTimeString = '${DateFormat().format(dateTimeValue)}';
}