/**
 * <zarr-loading-steps> - animated stepper shown while Zarr conversion is in progress.
 *
 * Attributes:
 *   status-code   number  Backend status code (0-5). Default: 3
 *   is-aggregation        Boolean. Changes the rotating messages shown.
 */
export declare class ZarrLoadingStepsElement extends HTMLElement {
    private _msgIdx;
    private _msgKey;
    private _elapsed;
    private _startTime;
    private _msgTimer;
    private _elapsedTimer;
    static get observedAttributes(): string[];
    get statusCode(): number;
    get isAggregation(): boolean;
    connectedCallback(): void;
    disconnectedCallback(): void;
    attributeChangedCallback(): void;
    private _startTimers;
    private _startMsgCycle;
    private _stopTimers;
    private _formatElapsed;
    private _render;
    private _renderMessage;
    /** Update only the stage dots (called when statusCode changes). */
    private _updateStages;
    /** Update only the rotating message text. */
    private _updateMessage;
}
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