/**
 * @license
 * Copyright 2021 Google LLC
 * SPDX-License-Identifier: BSD-3-Clause
 */
import type { LocaleModule } from '@lit/localize';
/**
 * Configuration parameters for lit-localize when in SSR mode.
 */
export interface SsrConfiguration {
    /**
     * Required locale code in which source templates in this project are written,
     * and the active locale.
     */
    sourceLocale: string;
    /**
     * Required locale codes that are supported by this project. Should not
     * include the `sourceLocale` code.
     */
    targetLocales: string[];
    /**
     * Required function that returns the localized templates for the given locale
     * code.
     *
     * This function will only ever be called with a `locale` that is contained by
     * `targetLocales`.
     */
    loadLocale: (locale: string) => Promise<LocaleModule | undefined>;
}
/**
 * Set configuration parameters for lit-localize when in SSR mode.
 *
 * Throws if called more than once.
 */
export declare const configureSsrLocalization: ({ sourceLocale, targetLocales, loadLocale, }: SsrConfiguration) => Promise<{
    withLocale: (locale: string, callback: () => void) => void;
}>;