Visualization html + dropdown

Hello Wolfgang,
The SurveyJS Dashboard visualizes survey responses. HTML questions are read-only questions - they don't receive any answers. Therefore, they should be basically excluded from visualization.

To exclude HTML questions from a dashboard, you can filter a list of questions which you pass to a visualization panel.

Consider this example:

JavaScript
let questions = survey.getAllQuestions().filter((question) => question.getType() != "html");
const vizPanel = new VisualizationPanel(
      questions,
      surveyResults,
      vizPanelOptions
);

Alternatively, register a custom visualizer and render HTML question's content within a dashboard. Please consider this example (View Demo):

JavaScript
function CustomHtmlVisualizer(question, data, options) {
  var renderContent = function (contentContainer, visualizer) {
    var qHtmlContainer = document.createElement("div");
    qHtmlContainer.innerHTML = question.html;
    contentContainer.appendChild(qHtmlContainer);
  };
  return new VisualizerBase(
    question,
    data,
    { renderContent: renderContent, dataProvider: options.dataProvider },
    "htmlVisualizer"
  );
}

VisualizationManager.registerVisualizer("html", CustomHtmlVisualizer);

I hope that either option works for you.

Regarding the second issue: to process it in the best manner, I created a separate ticket on your behalf.
Dropdown is not localized

Please refer to it for further correspondence.

Let me know if you have any questions regarding HTML visualization.

Thanks