import { WritableReactiveRef } from "../$";
import type { Signal } from "@preact-signals/unified-signals";
/**
 *
 * Allows to create writableRef to object property of Signal. Using of `deepSignal` is preferred, but this API can be handy if you avoiding to use deep reactivity tracking system.
 *
 * @example
 * ```tsx
 * const obj = signal({
 *  a: 1,
 *  b: 2
 * })
 *
 * const a = writableRefOfObjectProp(obj, 'a')
 * a.value = 2
 *
 * console.log(obj.value.a) // 2
 * ```
 *
 */
export declare const writableRefOfObjectProp: <T extends Record<any, any>, K extends keyof T>(obj: WritableReactiveRef<T> | Signal<T>, key: K) => WritableReactiveRef<T[K]>;
/**
 *
 * Allows to create writableRef to array element of Signal. Using of `deepSignal` is preferred, but this API can be handy if you avoiding to use deep reactivity tracking system.
 *
 * @example
 * ```tsx
 * const arr = signal([1, 2, 3])
 *
 * const second = writableRefOfArrayProp(arr, 1)
 * second.value = 4
 *
 * console.log(arr.value) // [1, 4, 3]
 * ```
 */
export declare const writableRefOfArrayProp: <T extends readonly any[], TIndex extends number>(array: WritableReactiveRef<T> | Signal<T>, index: TIndex) => WritableReactiveRef<T[TIndex]>;