/** Base64 payload and media type decoded from a data URI. */
export interface DecodedDataUri {
    data: string;
    mimeType: string;
}
/**
 * Decodes base64 and percent-encoded `data:` URIs.
 *
 * Returns `undefined` for non-data URLs and data URIs without a comma separator.
 */
export declare function decodeDataUri(url: string): DecodedDataUri | undefined;