description

# parameters property Null safety

Map<String, String> parameters

A map representing the parameters of the media type.

A data URI may contain parameters between the MIME type and the data. This converts these parameters to a map from parameter name to parameter value. The map only contains parameters that actually occur in the URI. The `charset` parameter has a default value even if it doesn't occur in the URI, which is reflected by the charset getter. This means that charset may return a value even if `parameters["charset"]` is `null`.

If the values contain non-ASCII values or percent escapes, they are decoded as UTF-8.

## Implementation

    Map<String, String> get parameters {
      var result = <String, String>{};
      for (int i = 3; i < _separatorIndices.length; i += 2) {
        var start = _separatorIndices[i - 2] + 1;
        var equals = _separatorIndices[i - 1];
        var end = _separatorIndices[i];
        String key = _Uri._uriDecode(_text, start, equals, utf8, false);
        String value = _Uri._uriDecode(_text, equals + 1, end, utf8, false);
        result[key] = value;
      }
      return result;
    }