Let us understand this with a practical example. Let’s say one of your friends posted a photograph on Facebook. Now you go and like the image and then you started checking out the comments too. Now, while looking through commentary, you see that counting has risen by 100 since you enjoyed the image even though you did not load the page again. It’s because of Reactjs that magical count shift.
React is an effective, declarative and versatile JavaScript library for the construction of user interfaces. In MVC, it’s’ V.’ ReactJS is a front end library with open-source components that is solely accountable for the application’s view layer. Facebook supports it.
React utilizes a declarative paradigm that facilitates the thinking and efficiency of your implementation. t designs easy opinions for each state in your implementation, and when your information changes, React effectively updates and returns the correct element. The declarative perspective makes debugging your code easier and more predictable.
A multi-component reacting request is produced for a tiny, reusable HTML piece each. In order to build complicated apps of easy construction blocks, component parts can be embedded into other parts. An inner state may also be maintained by a component–e.g. a variable of the current table can be stored by a TabList element.
NOTE: React is not a framework. It is just a library developed by Facebook to solve some problems that we were facing earlier.