maxLength static method

String? maxLength(
  1. String? value,
  2. int length, {
  3. String? message,
})

Validates a maximum length.

Implementation

static String? maxLength(String? value, int length, {String? message}) {
  if (value == null || value.trim().isEmpty) return null;
  if (value.length <= length) return null;
  return message ?? 'Must be at most $length characters';
}