/**
 * Manages ordered insertion of registered child elements within a single layout slot element.
 *
 * Each child is registered under a string key with a numeric weight. The resolved DOM order is:
 * configured keys first (in the order passed to `setOrder`), then the remaining keys by ascending
 * weight, ties broken by registration order.
 */
export declare class DomSlot {
    #private;
    /**
     * @param {HTMLElement} parent The slot container element.
     * @param {object} [options] Slot options.
     * @param {string} [options.itemClass=''] Class added to every registered element.
     */
    constructor(parent: HTMLElement, { itemClass }?: {
        itemClass?: string;
    });
    /**
     * Returns the slot container element.
     *
     * @returns {HTMLElement} The container element.
     */
    getElement(): HTMLElement;
    /**
     * Checks whether a key is registered.
     *
     * @param {string} key The registration key.
     * @returns {boolean} `true` when the key is registered.
     */
    has(key: string): boolean;
    /**
     * Registers (or replaces) an element under a key and re-applies the slot order.
     *
     * @param {string} key The registration key.
     * @param {HTMLElement} element The element to insert.
     * @param {number} [weight=0] The ordering weight (lower comes first).
     * @returns {void}
     */
    add(key: string, element: HTMLElement, weight?: number): void;
    /**
     * Unregisters a key and detaches its element from the DOM.
     *
     * @param {string} key The registration key.
     * @returns {void}
     */
    remove(key: string): void;
    /**
     * Sets the user-configured key order and re-applies it.
     *
     * @param {string[]} order The ordered list of keys.
     * @returns {void}
     */
    setOrder(order: string[]): void;
    /**
     * Returns the current resolved key order.
     *
     * @returns {string[]} The ordered keys.
     */
    getOrder(): string[];
    /**
     * Removes all registered elements and clears the registry.
     *
     * @returns {void}
     */
    clear(): void;
}