main.dart

extension StringExtension on String {
  /// Truncate a string if it's longer than [maxLength] and add an [ellipsis].
  String truncate(int maxLength, [String ellipsis = "…"]) => length > maxLength
      ? '${substring(0, maxLength - ellipsis.length)}$ellipsis'
      : this;
}

void main() {
  print('lsdkf osfk sifhsoidfj'.truncate(10));
}