rface" href="https://html.spec.whatwg.org/multipage/custom-elements.html#elementinternals"><c- g>ElementInternals</c-></a> {
  <c- b>readonly</c-> <c- b>attribute</c-> <a data-link-type="idl-name" href="#customstateset"><c- n>CustomStateSet</c-></a> <a data-readonly data-type="CustomStateSet" href="#dom-elementinternals-states"><code><c- g>states</c-></code></a>;
};

[<a class="idl-code" data-link-type="extended-attribute" href="https://webidl.spec.whatwg.org/#Exposed"><c- g>Exposed</c-></a>=<c- n>Window</c