Comment éviter les caractères spéciaux dans Validator

// alphanumeric
static final  validCharacters = RegExp(r'^[a-zA-Z0-9]+$');
// alphanumeric and &%=
static final validCharacters = RegExp(r'^[a-zA-Z0-9&%=]+$');


void main() {
  final validCharacters = RegExp(r'^[a-zA-Z0-9_\-=@,\.;]+$');
  print(validCharacters.hasMatch('abc123'));
}
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