In this chapter, we peeked at the TypeScript language that is used for the implementation of Angular. Although we can develop our Angular applications using ECMAScript 5, Google's recommendation is to use TypeScript in order to take advantage of the static typing it provides.

While exploring the language, we looked at some of the core features of ES2015 and ES2016. We explained the ES2015 and ES2016 classes, arrow functions, block scope variable definitions, destructuring, and modules. Since Angular takes advantage of the ES2016 decorators, and more accurately their extension in TypeScript, a section was dedicated to them.

After this, we took a look at how we can take advantage of static typing using explicit type definitions. We described some of the built-in types in TypeScript and how we can define classes in the language by specifying access modifiers for their members. Our next stop was the interfaces. We ended our adventures in TypeScript by explaining the type parameters and...