export declare function set_local_storage(key: string, val: string): void;
export declare function get_local_storage(key: string): string | undefined;
/**
 * Deletes key from local storage
 * FRONT END ONLY
 */
export declare function delete_local_storage(key: string): void;
export declare function has_local_storage(): boolean;
export declare function local_storage_length(): number;