1. Support for creation params.
   • [web] Support platform view creation params engine#42255
   • [web] Pass creation params to the platform view factory #128146
2. New dart:ui_web to get a view (aka Dom Element) by ID.
   • [web] New platform view API to get view by ID engine#41784
3. Add built-in view factory that simply does document.createElement(creationParams.tagName).
4. New HtmlElementView.fromTagName constructor.

The combined improvements above should make it much simpler to create platform views:

HtmlElementView.fromTagName(
  tagName: 'div',
  isVisible: false,
  onElementCreated: (DomElement element) {
    element.style
      ..width = '100%'
      ..height = '100%';
    if (debug) {
      element.style.backgroundColor = 'red';
    }
  },
)