import { ReactiveController, ReactiveControllerHost } from 'lit';
export declare class SbbSlottedChangeEvent extends Event {
    readonly slot: HTMLSlotElement;
    constructor(slot: HTMLSlotElement);
}
/**
 * This controller checks for slotted children. From these it updates
 * the ElementInternals states with the pattern `slotted-<name>` or `slotted`
 * for the unnamed slot.
 *
 * This allows a :state(slotted-<name>) CSS selector to display/hide/configure
 * a section of the component as required.
 *
 * @example
 * .example {
 *   display: none;
 *
 *   :host(:state(slotted-icon)) & {
 *     display: inline;
 *   }
 * }
 *
 * https://developer.mozilla.org/en-US/docs/Web/CSS/:state
 */
export declare class SbbSlotStateController implements ReactiveController {
    private _host;
    private _internals;
    private _textObserver;
    constructor(_host: ReactiveControllerHost & HTMLElement, _internals: ElementInternals);
    hostConnected: ReactiveController['hostConnected'];
    private _slotchangeHandler;
    private _handleSlotChange;
    private _updateSlottedState;
    private _observeTextNodesInSlot;
    private _hasSlottedContent;
}
declare global {
    interface HTMLElementEventMap {
        slottedchange: SbbSlottedChangeEvent;
    }
    interface ShadowRootEventMap {
        slottedchange: SbbSlottedChangeEvent;
    }
}
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