description

# transaction method Null safety

Transaction transaction (

1. dynamic storeName_OR_storeNames,
2. String mode

)

## Implementation

    Transaction transaction(storeName_OR_storeNames, String mode) {
      if (mode != 'readonly' && mode != 'readwrite') {
        throw new ArgumentError(mode);
      }

      // TODO(sra): Ensure storeName_OR_storeNames is a string or List<String>,
      // and copy to JavaScript array if necessary.

      // Try and create a transaction with a string mode.  Browsers that expect a
      // numeric mode tend to convert the string into a number.  This fails
      // silently, resulting in zero ('readonly').
      return _transaction(storeName_OR_storeNames, mode);
    }