export declare class TabsContainer extends HTMLElement {
    private _selectedTab;
    constructor();
    connectedCallback(): void;
    private render;
    private setupEventListeners;
    private updateTabs;
    private selectTab;
    static get observedAttributes(): string[];
    attributeChangedCallback(name: string, _: string, newValue: string): void;
}
export declare class TabItem extends HTMLElement {
    constructor();
    connectedCallback(): void;
}