/// <reference types="emscripten" />
export declare let fs: typeof FS;
export declare function setFS(fsModule: typeof FS): void;
/**
 * Utils to work with file system.
 */
export declare class FileSystem {
    /**
     * Download file from url to WASM virtual file system.
     * @param localPath The local path to write the data to.
     * @param fetchInput The url or Request object to fetch.
     * @param fetchInit The RequestInit object to modify the request.
     * @returns true if success, false if failed.
     */
    static download(localPath: string, fetchInput: RequestInfo, fetchInit?: RequestInit): Promise<boolean>;
    /**
     * Write text or binary data to WASM virtual file system.
     * @param localPath The local path to write the data to.
     * @param data The text or binary data to write.
     */
    static writeFile(localPath: string, data: string | ArrayBufferView, opts?: {
        flags?: string | undefined;
    }): void;
    /**
     * Read text or binary data from WASM virtual file system.
     * @param localPath The local path to read the data from.
     * @returns File content as text or binary data.
     */
    static readFile(localPath: string): Uint8Array;
    /**
     * Get parent directory of a path.
     * @param path Any path.
     * @returns The parent directory of the path.
     */
    static getParentDir(path: string): string;
    /**
     * Make directory in WASM virtual file system.
     * @param path Directory path.
     * @returns void
     */
    static mkdir(path: string): void;
}