Why Every Front-End Developer Should Know Publish-Subscribe Pattern?

Programmer and architect hardwired to front-end and web-like technologies. Thinks that JavaScript is the best thing that could happen to humanity in the 20th century. He is interested in everything that is going on in your browser - from first electrons that are emitted from back-end server machine to last pixels rendered in the web browser. He thinks that the art of dialogue between a developer, a project manager and a business representative uses a bit antiquated approaches that need reinventing. He believes that many projects suffer from inadequate requirement definition - and by using proper tools and practices, we can finish every single product perfectly.