ladybird/Userland/Libraries/LibWeb/DOM/ChildNode.idl

// https://dom.spec.whatwg.org/#childnode
interface mixin ChildNode {
    [CEReactions, Unscopable] undefined before((Node or DOMString)... nodes);
    [CEReactions, Unscopable] undefined after((Node or DOMString)... nodes);
    [CEReactions, Unscopable] undefined replaceWith((Node or DOMString)... nodes);
    [CEReactions, Unscopable, ImplementedAs=remove_binding] undefined remove();
};