export type WebStorageArea = "local" | "session";
/** Shared bag key used by {@link lsStore} / {@link ssStore}. */
export declare const MATES_STORE_KEY = "mates_storage";
/** True when Web Storage APIs can be used (non-SSR browser). */
export declare function isWebStorageAvailable(): boolean;
export declare function getWebStorage(area: WebStorageArea): Storage | null;
export declare function listStorageKey(area: WebStorageArea, name: string): string;
export declare function atomStorageKey(area: WebStorageArea, name: string): string;
export declare function readJson<T>(storage: Storage | null, key: string, fallback: T): T;
export declare function writeJson(storage: Storage | null, key: string, value: unknown): void;
export declare function removeKey(storage: Storage | null, key: string): void;
export declare function onStorageEvent(area: WebStorageArea, handler: (e: StorageEvent) => void): void;
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