JavaScript has had, by any standard, a wild ride since it was first invented. No one expected it to be as successful, or as ubiquitous, as it is. In this talk, Dave Herman discusses the evolution of JavaScript, from the language’s humble beginnings to its high-speed, just-in-time compiled present, to the way in which it is moving toward the future. How can a language, used by hundreds of millions of people every day, change without breaking everything? What does the design process look like?