Ionic is powered by the AngularJS framework (which is also commonly just called Angular), which drives the UI interactions, gestures, animations, and well, essentially the entire functionality of your app. Understanding it is crucial to the experience of working with Ionic.

Angular was initially developed by Google in 2009 in an effort to enhance HTML with dynamic data binding at the tag level (the name Angular refers to the angular brackets around the HTML tags). Its architectural philosophy is firmly grounded in the Model-View-Controller (MVC) pattern and centered around an augmented HTML syntax for building UIs and a feature-rich, modular core framework to create business logic.

Due to its extensive nature, writing a concise introduction to Angular is not easy. As we work our way through the coming chapters, we will gradually go deeper and increase our knowledge of the framework. Here, we will settle for an outline of the most important aspects of AngularJS so that...