import { LitElement } from 'lit';
export declare const UUIModalOpenEvent = "uui:modal-open";
export declare const UUIModalCloseEvent = "uui:modal-close";
export declare const UUIModalCloseEndEvent = "uui:modal-close-end";
export declare class UUIModalElement extends LitElement {
    protected _dialogElement?: HTMLDialogElement;
    isOpen: boolean;
    isClosing: boolean;
    index: number;
    uniqueIndex: number;
    private _transitionDuration;
    get transitionDuration(): number;
    set transitionDuration(value: number);
    protected firstUpdated(_changedProperties: Map<string | number | symbol, unknown>): void;
    open: (event?: Event) => void;
    close: (event?: Event) => void;
    protected _openModal(): void;
    forceClose(): void;
    static styles: import("lit").CSSResult[];
}