Unicode makes it possible for programmers to work easily (or at least, more easily) with multiple character sets within a single program. Not all developers know how to work with Unicode, and not all developers realize that JavaScript natively supports Unicode. Moreover, not everyone realizes what it means for JavaScript to natively support Unicode. This talk, by front-end developer Mathias Bynens, describes the Uniocde support, but also some of the surprises that JavaScript has for people expecting to use this support.