dart:html Element.setInnerHtml signature accepts null but throws if passed

[nshahan]

The new signature is in the Null Safe SDK is

void setInnerHtml(String? html,
      {NodeValidator? validator, NodeTreeSanitizer? treeSanitizer})

But within the body html! appears which causes an error when you pass null.

Repro:

import 'dart:html';

main() {
  document.body!.setInnerHtml(null);
}

Compiling with DDC and running in a browser will cause the error:
Uncaught Error: NoSuchMethodError: '<Unexpected Null Value>'

cc @srujzs

[nshahan]

I forgot to mention it looks like with the current SDK this would result in the string "null" being inserted as the inner HTML.

[srujzs]

Thanks for filing this. We've discussed potentially either clearing the innerHtml string or forwarding the null string to createFragment but it's not sure what the effects of either of these decisions are. It's possible createFragment is typed incorrectly as well.