A dart code behaves differently in dartpad and local because of double type

Question

//Works on Dartpad

main() {
  var pi = 3.14; //3.14159265359
  var numbers = 0;
  dynamic result = 1.2;

  while (result.runtimeType == double) {
    numbers++;
    result = numbers * pi;
  }
  print('$result / $numbers = $pi');
}

//Works on local

main() {
  var pi = 3.14; //3.14159265359
  var numbers = 0;
  dynamic result = 1.2;
  while ((result - result.truncate()) != 0) {
    numbers++;
    result = numbers * pi;
  }
  print('${result.truncate()} / $numbers = $pi');
}

The problem is whenever you initialize a double variable, the dartpad can convert it to an integer when it becomes an integer but the local compiler doesn't do that. Could this be caused by js? Because as far as I know dartpad compiles with js.