React's three fundamental principles make it easy to write code, encapsulate components, and share code across multiple platforms. Instead of reinventing the wheel, React always tries to make use of existing JavaScript features as much as possible. As a result, we are going to learn software design patterns that will be applicable in many more cases than just designing user interfaces.

React always strives to make the developer experience as smooth as possible, while ensuring that it is kept performant enough, without the developer having to worry too much about how to optimize performance. However, throughout the years of using React, a couple of problems have been identified. 

Let's take a look at these problems in detail in the following sections.