widgetNameValidator static method

String? widgetNameValidator(
  1. String? widgetName
)

widgetNameValidator returns null if the given widgetName is valid.

Implementation

static String? widgetNameValidator(String? widgetName) {
  if (!RegExp(r'^[a-zA-Z0-9 ]+$').hasMatch(widgetName ?? "") &&
      (widgetName ?? "").isNotEmpty) {
    return ("No special character allowed");
  }
  return (null);
}