/*!
 * V4Fire Core
 * https://github.com/V4Fire/Core
 *
 * Released under the MIT license
 * https://github.com/V4Fire/Core/blob/master/LICENSE
 */
/**
 * Returns true if the current host has a connection to the internet or null
 * if the connection status can't be checked.
 *
 * This engine checks the connection by using a request for some data from the internet.
 */
export declare function isOnline(): Promise<boolean | null>;