interface FormatTagOptions {
    itemSep?: string;
    hyphen?: string;
}
/**
 * Does a conversion like `[1,3,4,6,7,8]` to `'1,3,4,6-8'`.
 * @param arr - The input array.
 */
declare const formatTag: (arr: number[], options?: FormatTagOptions) => string;
export default formatTag;