import './_version.js';
/**
 * If the browser supports Navigation Preload, then this will enable it.
 *
 * @param {string} [headerValue] Optionally, allows developers to
 * [override](https://developers.google.com/web/updates/2017/02/navigation-preload#changing_the_header)
 * the value of the `Service-Worker-Navigation-Preload` header which will be
 * sent to the server when making the navigation request.
 *
 * @memberof module:workbox-navigation-preload
 */
declare function enable(headerValue?: string): void;
export { enable };