loadHtmlString method
Loads the supplied HTML string.
The baseUrl parameter is used when resolving relative URLs within the
HTML string.
Implementation
@override
Future<void> loadHtmlString(String html, {String? baseUrl}) async {
  // ignore: unsafe_html
  _webWebViewParams.iFrame.src = Uri.dataFromString(
    html,
    mimeType: 'text/html',
    encoding: utf8,
  ).toString();
}