initView method
      
  
void
initView(
    
    
- String viewId, {
- required String styleWidth,
- required String styleHeight,
- required String width,
- required String height,
- required String src,
override
    Implementation
@override
void initView(
  String viewId, {
  required String styleWidth,
  required String styleHeight,
  required String width,
  required String height,
  required String src,
}) {
  // ignore: undefined_prefixed_name
  ui.platformViewRegistry.registerViewFactory(
    viewId,
    (int id) => html.IFrameElement()
      ..style.width = styleWidth
      ..style.height = styleHeight
      ..width = width
      ..height = height
      ..src = src
      ..style.border = 'none'
      ..appendHtml('<div id="html_view" hidden>html_view<div>'),
  );
}