/**
 * Full-screen loading spinner overlay.
 *
 * Renders a spinner element inside the given context and provides methods
 * to show, hide, and destroy the overlay.
 */
export default class Loading {
    /** The root DOM node of the loading overlay. */
    protected readonly loadingNode: HTMLDivElement;
    /**
     * Creates a loading overlay and appends it to the given context element.
     *
     * @param context - The parent DOM element to append the loading overlay into.
     */
    constructor(context: HTMLElement);
    /**
     * Returns the HTML string for the loading spinner overlay.
     *
     * @returns The loading overlay HTML string.
     */
    protected render(): string;
    /**
     * Shows the loading overlay.
     *
     * @returns This instance for chaining.
     */
    show(): Loading;
    /**
     * Hides the loading overlay.
     *
     * @returns This instance for chaining.
     */
    hide(): Loading;
    /**
     * Removes the loading overlay DOM node from the document.
     */
    destroy(): void;
}