/**
 * Defines an abstract class with Blob utilities.
 *
 * @since v1.6.1
 */
export declare abstract class Blobs {
    /**
     * Gets the JavaScript URL interface.
     *
     * @private
     *
     * @since v1.6.1
     */
    private static readonly URL;
    /**
     * Converts a `File` object to a `Blob` object asynchronously.
     *
     * @param {File} file Contains some `File` object
     * @return {Promise} a `Blob` object asynchronously.
     */
    static fromFile(file: File): Promise<Blob>;
    /**
     * Converts an `ImageData` object to a `Blob` object asynchronously.
     *
     * @param {ImageData} imageData Contains an `ImageData` object.
     * @return {Promise} a `Blob` object asynchronously.
     *
     * @since v1.6.1
     */
    static fromImageData(imageData: ImageData): Promise<Blob>;
    /**
     * Converts an `URL` object to a `Blob` object.
     *
     * @param {String} url Contains an `URL` object.
     * @return {Blob} a `Blob` object.
     *
     * @since v1.6.1
     */
    static fromObjectURL(url: URL): Promise<Blob>;
    /**
     * Converts a string URL to a `Blob` object.
     *
     * @param {String} url Contains a string URL.
     * @return {Blob} a `Blob` object.
     *
     * @since v1.6.1
     */
    static fromObjectURL(url: string): Promise<Blob>;
    /**
     * Checks whether the specified value is a `Blob` instance.
     *
     * @param {*} value Contains some value.
     * @return {Boolean} whether the specified value is a `Blob` instance.
     *
     * @since v1.6.1
     */
    static isBlob(value?: any): value is Blob;
    /**
     * Converts a `Blob` object to a Base64 string.
     *
     * @param {Blob} blob Contains a `Blob` object.
     * @return {Promise} a Base64 string.
     *
     * @since v1.6.1
     */
    static toBase64(blob: Blob): Promise<string>;
    /**
     * Converts a `Blob` object into a `File` object.
     *
     * @param {Blob} blob Cotnains some `Blob` object.
     * @param {String} fileName Contains some file name.
     * @return {File} a `File` object.
     */
    static toFile(blob: Blob, fileName: string): File;
    /**
     * Converts a `Blob` object to an `ImageData` object.
     *
     * @param {Blob} blob Contains a `Blob` object.
     * @return {Promise} an `ImageData` object.
     *
     * @since v1.6.1
     */
    static toImageData(blob: Blob): Promise<ImageData>;
    /**
     * Converts a `Blob` object to a string URL.
     *
     * @param {Blob} blob Contains some `Blob` object.
     * @return {Promise} a string URL.
     *
     * @since v1.6.1
     */
    static toObjectURL(blob: Blob): Promise<string>;
}