minLength static method

String? minLength(
  1. String? value,
  2. int min, {
  3. String fieldName = 'Field',
})

Implementation

static String? minLength(String? value, int min,
    {String fieldName = 'Field'}) {
  if (value == null || value.trim().isEmpty) return '$fieldName is required';
  if (value.length < min)
    return '$fieldName must be at least $min characters';
  return null;
}