Explore reactive programming concepts and their practical applications in this 50-minute Devoxx conference talk. Dive into the core principles of reactive programming, understand Observables, Subjects, and their behaviors, and learn how to differentiate between hot and cold Observables. Follow along with a live coding demonstration that demystifies RxJS by building an Observable from scratch. Gain insights into the synchronous and lazy nature of Observables, and discover how they function as simple functions. Examine the role of operators in reactive programming and get introduced to CycleJS, a framework for developing web applications using reactive programming principles. Perfect for developers looking to enhance their understanding of reactive programming and its implementation in modern web development.