import { ComponentOptions, ComponentProps, RenderFn } from './types.js';
/** Symbol key used to attach onDestroyFns to a component container. */
export declare const DESTROY_KEY: unique symbol;
/**
 * Define a stateful component.
 * setup() runs ONCE — call signal(), onInit(), onMount(), onDestroy(), useHead() here.
 * setup() returns a render fn that re-runs when any subscribed signal changes.
 * options.hydrate controls island strategy (default: 'static').
 *
 * @example
 * const Counter = component(() => {
 *   const [count, setCount] = signal(0);
 *   return () => (
 *     <button onClick={() => setCount(n => n + 1)}>
 *       Clicked {count()} times
 *     </button>
 *   );
 * }, { hydrate: 'interactive' });
 */
export declare function component<P extends object = object>(setup: (props: P & ComponentProps<P>) => RenderFn, options?: ComponentOptions): (props?: P & ComponentProps<P>) => Element;
export { component as defineComponent };