checkIfEmptyOrEqualTo method Null safety

String? checkIfEmptyOrEqualTo(
  1. TextEditingController textEditingController,
  2. String compareString
)

Checks if the Value of a TextEditingController is empy or equal to a given string compareString.

Implementation

static String? checkIfEmptyOrEqualTo(
    TextEditingController textEditingController, String compareString) {
  final text = textEditingController.text;
  if (text == compareString) {
    return 'Text ist unverändert';
  }
  // return null if the text is valid
  return null;
}