export interface WaitForOptions {
    timeout?: number;
    interval?: number;
    signal?: AbortSignal;
}
/**
 * Repeatedly evaluates a condition until it returns a truthy value or the
 * timeout elapses. Resolves with the final truthy value.
 *
 * @template T - Truthy result type
 * @param {() => T | Promise<T>} condition - Condition predicate
 * @param {WaitForOptions} [options] - Polling configuration
 * @returns {Promise<NonNullable<T>>} The first truthy value
 * @throws {Error} When the timeout elapses or the signal aborts
 * @example
 * await waitFor(() => document.querySelector("#root"), { interval: 100 });
 */
export declare const waitFor: <T>(condition: () => T | Promise<T>, options?: WaitForOptions) => Promise<NonNullable<T>>;