nuxt/dist/app/composables/hydrate.d.ts

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/**
 * Allows full control of the hydration cycle to set and receive data from the server.
 *
 * @param key a unique key to identify the data in the Nuxt payload
 * @param get a function that returns the value to set the initial data
 * @param set a function that will receive the data on the client-side
 */
export declare const useHydration: <K extends string | number | symbol, T = NuxtPayload>(key: K, get: () => T, set: (value: T) => void) => void;