The Concept of Immutability

This chapter will deal with the concept of immutability and its importance in building performant web applications. In addition to that, we will focus on setting up immutable JS, which is an open source library from Facebook; we will cover its concept and components.

The major topics that will be covered in this chapter are as follows:

• The need for immutability
• Setting up immutable JS in React/Redux applications
• Testing immutable JS