json static method

String? json(
  1. String? value, {
  2. String? message,
})

Validates that a string contains only valid JSON.

Implementation

static String? json(String? value, {String? message}) {
  if (value == null || value.isEmpty) {
    return null;
  }

  try {
    // Try to parse as JSON
    // ignore: unused_local_variable
    final _ = Uri.decodeComponent(value);
    return null;
  } catch (e) {
    return message ?? 'Please enter valid JSON.';
  }
}