import { type OffscreenDocument } from './OffscreenDocument.js';
import { OffscreenCSSStyleDeclaration } from './OffscreenCSSStyleDeclaration.js';
export declare const ancestorDocument: unique symbol;
export declare const _attributes: unique symbol;
export declare const _children: unique symbol;
export declare const textContent: unique symbol;
export declare const _cssRuleContents: unique symbol;
export declare const uniqueId: unique symbol;
declare const _style: unique symbol;
type OffscreenStyleSheet = {
    cssRules: {
        style: {
            cssText: string;
        };
    }[];
    insertRule: (rule: string, index: number) => number;
};
export declare class OffscreenElement extends EventTarget {
    #private;
    [textContent]: string;
    private [_style]?;
    private readonly [_attributes];
    private _parentElement;
    readonly [_children]: OffscreenElement[];
    [_cssRuleContents]?: string[];
    /**
     * @private
     */
    readonly [uniqueId]: number;
    /**
     * @private
     */
    [ancestorDocument]: OffscreenDocument;
    readonly localName: string;
    constructor(localName: string, elementUniqueId: number);
    get sheet(): OffscreenStyleSheet;
    get tagName(): string;
    get style(): OffscreenCSSStyleDeclaration;
    get children(): OffscreenElement[];
    get parentElement(): OffscreenElement | null;
    get parentNode(): OffscreenElement | null;
    get firstElementChild(): OffscreenElement | null;
    get lastElementChild(): OffscreenElement | null;
    get nextElementSibling(): OffscreenElement | null;
    protected _remove(): void;
    setAttribute(qualifiedName: string, value: string): void;
    getAttribute(qualifiedName: string): string | null;
    removeAttribute(qualifiedName: string): void;
    append(...nodes: (OffscreenElement)[]): void;
    appendChild(node: OffscreenElement): OffscreenElement;
    replaceWith(...nodes: (OffscreenElement)[]): void;
    getAttributeNames(): string[];
    remove(): void;
    insertBefore(newNode: OffscreenElement, refNode: OffscreenElement | null): OffscreenElement;
    removeChild(child: OffscreenElement | null): OffscreenElement;
    addEventListener(type: string, callback: EventListenerOrEventListenerObject | null, options?: AddEventListenerOptions | boolean): void;
    set textContent(text: string);
}
export {};