This book will help you take your first steps in the amazing new world of j & # 097; vascript, client applications and frameworks based on the ES6 specification. It will introduce you to the most useful innovations in j & # 097; vascript and all the functionality available now. Will teach you how to design modular applications using the built-in system of ES6 modules, and how to make the code cleaner, more concise and more pleasant to work with.