bool allowFullscreen

Source 

@DomName('HTMLIFrameElement.allowFullscreen')
@DocsEditable()
@Experimental() // untriaged
bool get allowFullscreen =>
    _blink.BlinkHTMLIFrameElement.instance.allowFullscreen_Getter_(this);
void allowFullscreen=(bool value)

Source 

@DomName('HTMLIFrameElement.allowFullscreen')
@DocsEditable()
@Experimental() // untriaged
set allowFullscreen(bool value) => _blink.BlinkHTMLIFrameElement.instance
    .allowFullscreen_Setter_(this, value);