Flutter TextField value always uppercase & debounce
Works on Android, iOS, Web, macOS, Windows and Linux
You can implement a custom TextInputFormatter
class UpperCaseTextFormatter extends TextInputFormatter { @override TextEditingValue formatEditUpdate(TextEditingValue oldValue, TextEditingValue newValue) { return TextEditingValue( text: newValue.text.toUpperCase(), selection: newValue.selection, ); }}Usage:
TextField( inputFormatters: [ UpperCaseTextFormatter(), ])