/**
 * Compares two pieces of HTML content and returns the combined content with differences
 * wrapped in <ins> and <del> tags.
 *
 * @param {string} before The HTML content before the changes.
 * @param {string} after The HTML content after the changes.
 * @param {string} className (Optional) The class attribute to include in `<ins>` and `<del>` tags.
 * @param {string} dataPrefix (Optional) The data prefix to use for data attributes. The
 *     operation index data attribute will be named `data-${dataPrefix-}operation-index`.
 * @param {string} atomicTags (Optional) Comma separated list of tag names. The list has to
 *     be in the form `tag1,tag2,...` e. g. `head,script,style`. An atomic tag is one whose
 *     child nodes should not be compared - the entire tag should be treated as one token.
 *     This is useful for tags where it does not make sense to insert `<ins>` and `<del>`
 *     tags. If not used, the default list `iframe,object,math,svg,script,video,head,style`
 *     will be used.
 *
 * @return {string} The combined HTML content with differences wrapped in `<ins>` and `<del>` tags.
 */
declare function diff(before: string, after: string, className?: string | null, dataPrefix?: string | null, atomicTags?: string | null): string;
export default diff;