HtmlSelectedContentElement Class
https://html.spec.whatwg.org/multipage/form-elements.html#htmlselectedcontentelement
public sealed class HtmlSelectedContentElement : HtmlElement- Inheritance
HtmlElementHtmlSelectedContentElement
https://html.spec.whatwg.org/multipage/form-elements.html#htmlselectedcontentelement
public sealed class HtmlSelectedContentElement : HtmlElementHtmlElement HtmlSelectedContentElement