The team at Google, willing to take advantage of the most advanced technologies in Angular, decided to start with a solid, statically typed foundation in the face of TypeScript. On top of that, they considered variety of different ways for the improvement of Angular's performance in order to help developers deliver lightning fast experience to the users of our applications.
Given the learned lesson from AngularJS about the constantly evolving browser APIs, the Angular team developed the framework with a small core and a lot of different libraries surrounding it, providing extra features. This way, the framework's foundational APIs will be able to stay as immutable as possible and the entire infrastructure surrounding Angular's core will evolve following the well-defined release process of semantic versioning. You can see some of the modules developed around Angular core in the following figure:
We'll describe some of these modules in the upcoming chapters.
Before going any further, let's have an overview of what semantic versioning actually means.
