Version 4 of the ArcGIS API for JavaScript introduces new patterns and fundamental concepts, including 3D mapping capabilities. You will learn the fundamentals of using the API in order to get the most out of it. Covering key concepts and how different components work together, you will also learn how to take advantage of the Widget framework built into the API to build your own reusable widgets for your own ArcGIS JSAPI applications. Including a series of samples you can use to leverage the API for your own applications, helps you take your existing knowledge of JavaScript to a new level, and add new features to your app libraries. What You'll Learn Who This Book Is For Developers who need to learn the ArcGIS JSAPI for work or school.