#import #import #import #import // https://html.spec.whatwg.org/multipage/scripting.html#htmlslotelement [Exposed=Window] interface HTMLSlotElement : HTMLElement { [HTMLConstructor] constructor(); [CEReactions, Reflect] attribute DOMString name; sequence assignedNodes(optional AssignedNodesOptions options = {}); sequence assignedElements(optional AssignedNodesOptions options = {}); undefined assign((Element or Text)... nodes); }; dictionary AssignedNodesOptions { boolean flatten = false; };