import { ReactiveController, ReactiveElement } from 'lit';
/**
 * A reactive controller that observes whether slotted content matching
 * given CSS selectors is present in the host's light DOM.
 *
 * Replaces the `ObserveSlotPresence` mixin with a composition-based approach.
 *
 * @example
 * ```typescript
 * class MyComponent extends SpectrumElement {
 *   private slotPresence = new SlotPresenceController(this, '[slot="icon"]');
 *
 *   get hasIcon(): boolean {
 *     return this.slotPresence.isPresent;
 *   }
 * }
 * ```
 *
 * @example
 * ```typescript
 * // Observing multiple selectors
 * class MyComponent extends SpectrumElement {
 *   private slotPresence = new SlotPresenceController(this, [
 *     '[slot="icon"]',
 *     '[slot="description"]',
 *   ]);
 *
 *   get hasIcon(): boolean {
 *     return this.slotPresence.getPresence('[slot="icon"]');
 *   }
 *
 *   get hasDescription(): boolean {
 *     return this.slotPresence.getPresence('[slot="description"]');
 *   }
 * }
 * ```
 */
export declare class SlotPresenceController implements ReactiveController {
    private host;
    private selectors;
    private presenceMap;
    private observer;
    constructor(host: ReactiveElement, selectors: string | string[]);
    /**
     * Whether slotted content is present. Use this when observing a single
     * selector. Throws if multiple selectors were provided — use
     * `getPresence(selector)` instead.
     */
    get isPresent(): boolean;
    /**
     * Returns whether content matching the given selector is present.
     */
    getPresence(selector: string): boolean;
    private checkPresence;
    hostConnected(): void;
    hostDisconnected(): void;
}