export interface LocalStorageEventPayload<TValue> {
    key: string;
    value: TValue;
}
/**
 * Used for creating new events for LocalStorage. This enables us to
 * have the ability of updating the LocalStorage from outside of the component,
 * but still update the component without prop drilling or creating a dependency
 * on a large library such as Redux.
 */
export declare class LocalStorageChanged<TValue> extends CustomEvent<LocalStorageEventPayload<TValue>> {
    static eventName: string;
    constructor(payload: LocalStorageEventPayload<TValue>);
}
/**
 * Checks if the event that is passed in is the same type as LocalStorageChanged.
 *
 * @export
 * @template TValue
 * @param {*} evt the object you wish to assert as a LocalStorageChanged event.
 * @returns {evt is LocalStorageChanged<TValue>} if true, evt is asserted to be LocalStorageChanged.
 */
export declare function isTypeOfLocalStorageChanged<TValue>(evt: any): evt is LocalStorageChanged<TValue>;
/**
 * Use this instead of directly using localStorage.setItem
 * in order to correctly send events within the same window.
 *
 * @example
 * ```js
 * writeStorage('hello', JSON.stringify({ name: 'world' }));
 * const { name } = JSON.parse(localStorage.getItem('hello'));
 * ```
 *
 * @export
 * @param {string} key The key to write to in the localStorage.
 * @param {string} value The value to write to in the localStorage.
 */
export declare function writeStorage<TValue>(key: string, value: TValue): void;
/**
 * Use this function to delete a value from localStorage.
 *
 * After calling this function, the localStorage value will be null.
 *
 * @example
 * ```js
 * const user = { name: 'John', email: 'John@fakemail.com' };
 *
 * // Add a user to your localStorage
 * writeStorage('user', JSON.stringify(user));
 *
 * // This will also trigger an update to the state of your component
 * deleteFromStorage('user');
 *
 * localStorage.getItem('user') === null // ✔ This is now null
 * ```
 *
 * @export
 * @param {string} key The key of the item you wish to delete from localStorage.
 */
export declare function deleteFromStorage(key: string): void;
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