import type { Component } from "../core/types.js";
/**
 * Allocate an ID that is unique in the current thread.
 *
 * @returns The unique id in the form `rvx_123`.
 */
export declare function uniqueId(): string;
/**
 * A component that provides a unique id in the form `rvx_123` to it's children.
 *
 * See {@link UseUniqueId `<UseUniqueId>`} when using JSX.
 *
 * @example
 * ```tsx
 * import { useUniqueId, e } from "rvx";
 *
 * useUniqueId(id => [
 *   e("label").set("for", id).append("Text"),
 *   e("input").set("type", "text").set("id", id),
 * ])
 * ```
 */
export declare function useUniqueId<T = unknown>(component: Component<string, T>): T;
/**
 * A component that provides a unique id in the form `rvx_123` to it's children.
 *
 * See {@link useUniqueId} when not using JSX.
 *
 * @example
 * ```tsx
 * import { UseUniqueId } from "rvx";
 *
 * <UseUniqueId>
 *   {id => <>
 *     <label for={id}>Text</label>
 *     <input type="text" id={id} />
 *   </>}
 * </UseUniqueId>
 * ```
 */
export declare function UseUniqueId(props: {
    children: Component<string>;
}): unknown;
/**
 * Get a {@link uniqueId unique id} for the specified object.
 *
 * @param target The target object.
 * @returns The id. This is always the same id for the same object.
 */
export declare function uniqueIdFor(target: object): string;