Tested in jQuery 1.3.2 and 1.4 IMPORTANT - This is a very young project. There are likely to be a few strange bugs. If you encounter one, please raise an issue. Likely bugs could include: Reporting correct argument lists as incorrect. Nested errors as a result of other oversights - e.g. you call css() incorrectly which might internally make a call to another method, which may then raise an error.