The new update (Citation.js v0.2.10) doesn't have a big impact on the API, but a lot has changed in the back end. ("back end" as in the helper functions that are called when the API is used.) First of all, there is Travis build tests now. It doesn't have edge test cases yet, but it covers the basics. Testing the basic specs The main thing is the new BibTeX I/O system. It isn't completely new, but a lot has changed.