/**
 * Monitors the download #progress of Emscripten modules
 *
 * Usage:
 *
 * ```js
 *   const downloadMonitor = new EmscriptenDownloadMonitor();
 * 	 const php = await startPHP(
 *       phpLoaderModule,
 *       'web',
 *       downloadMonitor.phpArgs
 *   );
 *   downloadMonitor.addEventListener('#progress', (e) => {
 *     console.log( e.detail.#progress);
 *   })
 * ```
 */
export declare class EmscriptenDownloadMonitor extends EventTarget {
    #private;
    expectAssets(assets: Record<string, number>): void;
    monitorFetch(fetchPromise: Promise<Response>): Promise<Response>;
}
export default EmscriptenDownloadMonitor;
export interface DownloadProgress {
    /**
     * The number of bytes loaded so far.
     */
    loaded: number;
    /**
     * The length number of bytes to load.
     */
    total: number;
    /**
     * The file that emitted this progress update.
     */
    fileName?: string;
    /**
     * The number of bytes loaded for the current file.
     */
    fileLoaded?: number;
    /**
     * The length number of bytes to load for the current file.
     */
    fileTotal?: number;
}
/**
 * Clones a fetch Response object and returns a version
 * that calls the `onProgress` callback as the #progress
 * changes.
 *
 * @param  response   The fetch Response object to clone.
 * @param  onProgress The callback to call when the download #progress changes.
 * @returns The cloned response
 */
export declare function cloneResponseMonitorProgress(response: Response, onProgress: (event: CustomEvent<DownloadProgress>) => void): Response;
/**
 * Clones a ReadableStream and returns a version
 * that calls the `onProgress` callback as the #progress
 * changes.
 *
 * @param  stream     The ReadableStream to clone.
 * @param  total     The total number of bytes to load.
 * @param  onProgress The callback to call when the download #progress changes.
 * @returns The cloned ReadableStream
 */
export declare function cloneStreamMonitorProgress(stream: ReadableStream<Uint8Array> | null, total: number, onProgress: (event: CustomEvent<DownloadProgress>) => void): ReadableStream<Uint8Array>;
export type DownloadProgressCallback = (progress: DownloadProgress) => void;