/**
 * Slot observation and reactive slot signals.
 *
 * `slots.has(name?)`: Signal<boolean> — whether a named slot has assigned elements.
 * `slots.elements(name?)`: Signal<Element[]> — assigned elements for a slot (flattened).
 */
import { type Readable } from '@vielzeug/ripple';
export type ComponentSlots<SlotNames extends string = string> = {
    elements: (name?: SlotNames) => Readable<Element[]>;
    has: (name?: SlotNames) => Readable<boolean>;
};
/**
 * Returns reactive slot presence / element signals for the current component.
 * Safe to call multiple times during `setup()` — the underlying slot registry
 * (MutationObserver + `slotchange` listeners) is created once per instance.
 *
 * Pass a `SlotNames` type parameter for typed slot names:
 * ```ts
 * const slots = useSlots<'header' | 'footer'>();
 * slots.has('header'); // typed ✓
 * ```
 */
export declare const useSlots: <SlotNames extends string = string>() => ComponentSlots<SlotNames>;
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