/**
 * Options for setting up CDN assets mapping
 */
export type XarcCdnAssetsMappingOptions = {
    /**
     * isomorphic-loader extend require instance
     *
     * - if not provided, then the default instance is used
     */
    extendRequire?: any;
    /**
     * assets mapping data
     *
     * - if not provided, then will try to load it from one of these files:
     * 1. dist/cdn-mappings.json
     * 2. config/assets.json
     *
     */
    mapping?: Record<string, unknown>;
    /**
     * Only setup in production mode (NODE_ENV === "production")
     */
    prodOnly?: boolean;
};
/**
 * Setup assets mapping to CDN URLs
 *
 * @param options - asset mapping options
 * @returns nothing
 */
export declare const setupIsomorphicCdnAssetsMapping: (options?: XarcCdnAssetsMappingOptions) => void;
/**
 * Load the require hook to support isomorphic assets when doing SSR
 *
 * @param ignoreExtensions - when a require file is not found, and its extension is
 *   in this, then it will be considered an isomorphic asset and an empty `{}` will
 *   be returned for it to avoid failing with module not found errors.
 *   - **Default**
 *     `".css|.scss|.sass|.pcss|.stylus|.styl|.less|.sss|.gif|.jpeg|.jpg|.png|.svg|.mp4|.webm|.ogv|.aac|.mp3|.wav|.ogg"`
 *   - set to `false` to disable this and let module not found error to throw
 *
 * @returns isomorphic require extender
 */
export declare function setupIsomorphicLoader(ignoreExtensions?: false | string | string[]): any;
/**
 * Setup APP_SRC_DIR when running node.js server
 *
 * - `src/` in development mode
 * - `lib/` in production mode
 *
 * @returns nothing
 */
export declare function setupAppSrcDir(): void;
/**
 * Available options for setting up run time support
 */
type XarcSupportOptions = {
    /**
     * - boolean: true to load @babel/register
     * - Object: options to be passed to @babel/register
     */
    babelRegister?: any;
    /**
     * Set to false to avoid loading node.js require hook to handle isomorphic assets.
     */
    isomorphicExtendRequire?: boolean;
    /**
     * Setup CDN mapping for isomorphic assets
     *
     * @remarks - if this is disabled, then any `import "style.css"` or `import "image.png"`
     *   will result in syntax error or module not found error in node.js.
     */
    isomorphicCdnOptions?: XarcCdnAssetsMappingOptions;
    /**
     * If true, then ensure everything is ready before resolving the returned promise.
     *
     * @remarks
     * In dev mode, resolving the promise depends on the app server starting and loading
     * the dev plugin.  What this means is basically:
     *
     * ```js
     * const loadSupport = support.load({awaitReady: true});
     * await startServer();
     * await loadSupport;
     *
     * // do any other initialization that could trigger importing isomorphic assets
     *
     * ```
     */
    awaitReady?: boolean;
};
/**
 * start node.js run time support for app server
 *
 * @param options - options on what runtime support to start
 * @returns Promise
 */
export declare function loadRuntimeSupport(
/**
 * support load options or a callback for when support load is done
 */
options?: XarcSupportOptions): Promise<any>;
export {};