/**
 * Returns an object with `url` and (MIME) `type` fields
 * If it cannot determine url or type, the corresponding value will be an empty string
 *
 * @param resource Any type, but only Responses, string URLs and data URLs are processed
 *
 * @todo string parameters are assumed to be URLs
 */
export declare function getResourceUrlAndType(resource: any): {
    url: string;
    type: string;
};
/**
  * Returns (approximate) content length for a resource if it can be determined.
  * Returns -1 if content length cannot be determined.
  * @param resource

  * @note string parameters are NOT assumed to be URLs
  */
export declare function getResourceContentLength(resource: any): number;
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