If you have been following our JavaScript Christmas calendar, chances are you have some interest, and perhaps even proficiency, in the JavaScript programming language. For this blog entry in particular, I hope you also have at least some interest in data science and machine learning. I will demonstrate how you can use your JavaScript skills to develop entry-level data science and machine learning applications, argue why you may want to do so, and provide you with lots of external resources to further expand your knowledge of this subject.