import { FASTElement } from "@microsoft/fast-element";
import type { AccordionMenuExpandMode } from "./accordion-menu.options.js";
/**
 * AccordionMenu
 * @summary An AccordionMenu component that provides an interactive accordion interface, allowing for expandable and collapsible sections. Implements ARIA Accordion.
 *
 * @example
 * ```html
 * <fabric-accordion-menu expand-mode="single">
 *   <fabric-accordion-item>
 *     <fabric-accordion-menu-panel>
 *       <!-- content for first panel -->
 *     </fabric-accordion-menu-panel>
 *   </fabric-accordion-item>
 *   <fabric-accordion-item>
 *     <fabric-accordion-menu-panel>
 *       <!-- content for second panel -->
 *     </fabric-accordion-menu-panel>
 *   </fabric-accordion-item>
 *   <!-- additional accordion items here -->
 * </fabric-accordion-menu>
 * ```
 *
 * @attr {AccordionMenuExpandMode} expand-mode - Controls the expand mode of the Accordion, either allowing single or multiple item expansion.
 *
 * @prop {ElementInternals} elementInternals - Internal element state used to manage the component.
 * @prop {HTMLElement[]} slottedElements - The slotted accordion menu items.
 * @prop {AccordionMenuExpandMode} expandmode - Controls the expand mode of the Accordion, either allowing single or multiple item expansion.
 *
 * @slot - The default slot for the accordion items.
 *
 * @csspart accordion-menu - Represents the accordion menu container.
 *
 * @method expandmodeChanged - Handles changes to the `expandmode` attribute.
 * @method handleChange - Handles changes to observed properties.
 * @method clearSelections - Clears the selections of menu items.
 * @method findExpandedItem - Finds the first expanded item in the accordion.
 * @method setItems - Sets up the accordion items.
 * @method isSingleExpandMode - Checks if the accordion is in single expand mode.
 * @method setSingleExpandMode - Controls the behavior of the accordion in single expand mode.
 *
 * @fires change - Fires a custom 'change' event when the active item changes.
 *
 * @extends FASTElement
 * @tagname fabric-accordion-menu
 * @public
 */
export declare class AccordionMenu extends FASTElement {
    /** Internal element state used to manage the component. */
    elementInternals: ElementInternals;
    /** Constructor for the AccordionMenu component. */
    constructor();
    /** Lifecycle method called when the component is connected to the DOM. */
    connectedCallback(): void;
    /** Lifecycle method called when the component is disconnected from the DOM. */
    disconnectedCallback(): void;
    /**
     * Controls the expand mode of the Accordion, either allowing
     * single or multiple item expansion.
     * HTML attribute: expand-mode
     * @public
     */
    expandmode: AccordionMenuExpandMode;
    /**
     * Handles changes to the `expandmode` attribute.
     * @param prev - The previous value.
     * @param next - The next value.
     */
    expandmodeChanged(prev: AccordionMenuExpandMode, next: AccordionMenuExpandMode): void;
    /**
     * The slotted accordion menu items.
     * @public
     */
    slottedElements: HTMLElement[];
    /**
     * Handles changes to observed properties.
     * @param source - The source element.
     * @param propertyName - The name of the property that changed.
     */
    handleChange(source: HTMLElement, propertyName: string): void;
    /**
     * Clears the selections of menu items.
     */
    clearSelections(): void;
    /**
     * Finds the first expanded item in the accordion.
     */
    private findExpandedItem;
    /**
     * Sets up the accordion items.
     */
    private setItems;
    private static elementIndent;
    /**
     * check if the item is a menu item
     */
    protected isMenuItemElement: (el: Element) => el is HTMLElement;
    /**
     * Checks if the accordion is in single expand mode.
     */
    private isSingleExpandMode;
    /**
     * Controls the behavior of the accordion in single expand mode.
     */
    private setSingleExpandMode;
    /**
     * Removes event listeners from items.
     */
    private removeItemListeners;
}
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