export declare function createTextNode(text: string): Text; export declare function createComment(text: string): Comment; export declare function insertBefore(parentNode: Node, newNode: Node, referenceNode: Node | null): void; export declare function removeChild(node: Node, child: Node): void; export declare function appendChild(node: Node, child: Node): void; export declare function parentNode(node: Node): Node | null; export declare function nextSibling(node: Node): Node | null; export declare function tagName(elm: Element): string; export declare function setTextContent(node: Node, text: string | null): void; export declare function getTextContent(node: Node): string | null; export declare function isElement(node: Node): node is Element; export declare function isText(node: Node): node is Text; export declare function isComment(node: Node): node is Comment;