Introduction to ReactJs

Introduction to ReactJs

Introduction to ReactJs includes the basic definition and the main concept behind the origin of the React. So Let’s get started.


React is a declarative, efficient, and flexible JavaScript library for building user interfaces.

ReactJS is maintained by Facebook and a community of individual developers and companies. It lets you compose complex UIs from small and isolated pieces of code called “components”. It is currently one of the most popular JavaScript front-end libraries which has a strong foundation and a large community supporting it.

React can be used as a base in the development of single-page applications or mobile applications. Complex React applications usually require the use of additional libraries for state management, routing, and interaction with an API.

ReactJS is only a frontend library and not the whole framework, which deals with the View component of MVC (Model – View – Controller).

Why ReactJs?

Javascript Frameworks like Angular, Backbone, Ember, and more were already in the industry to manage the view of our application then why React?

The answer is what if you could create your own HTML element that has customized functionality? For example, one could make a <MyHeaderMenu> element that would display a Logo, Heading, Subheading, Search bar input, Navbar menu, run validations on the text typed into the search bar input, submits the form when the user hits the enter key, etc — all just by including one line of code: <MyHeaderMenu></MyHeaderMenu>.

For those of you coming from the Angular world, you can think of React Components as a close analogy to Directives

However, React is capable of becoming an entire replacement for your views because you can nest components. The biggest advantage of using components is that you can change any component at any point in time without affecting the rest of the applications. This feature is most effective when implemented with larger and real-time applications where data changes frequently. When we update or change any data, ReactJS automatically updates the specific component whose state has actually changed. This saves the browser from the task of reloading the whole application to reflect the changes.

Example of the web page entirely rendered using ReactJs can be

So with the help of this small example, we can imagine the scope of ReactJs in industry. We hope we were able to explain what is React and why you should use it.

If you still have any doubt about the topic you can comment below or contact us here.

Hope you liked it 🙂

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