Introduction to ReactJS

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Introduction to ReactJS

Introduction to React JS

Overview of ReactJS:

React.js is a JavaScript library developed by Facebook. React is a library for building composable UIs. It empowers the creation of reusable UI segments which present data that changes over time. Many people make use of React as the V in MVC. React abstracts away the DOM from you, resulting in a complex programming model and better execution. React can also render on the server using Node, and it can power local apps using React Native. React actualizes one-way reactive data stream which reduces standard and is easier to reason about than traditional data binding.

Why do people choose to program with React?

Fast - Feel quick and responsive through the Apps made in React can handle complex updates.
Modular - Allow you to write many smaller, reusable files, instead of writing large, dense files of code. Modularity of React is a beautiful solution for JavaScript's visibility issues.
Scalable - React performs best in case of large programs that display a lot of data changes.
Flexible - React approaches differently by breaking them into components while building user interfaces. This is incredibly important in large applications.
Popular - ReactJS gives better performance than other JavaScript languages due to t’s implementation of a virtual DOM.

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React Features:

1. JSX − JSX is a preferable choice for many web developers. It isn't necessary to use JSX in React development, but there is a huge difference between writing react.js documents in JSX and in JavaScript.

2. Unidirectional data flow and Flux − React.js is designed in such a manner that it will only support data that is flowing downstream, in one direction. If the data has to flow in another direction, you will need additional features.

3. Components − Components are the heart and soul of React. Components (like JavaScript functions) let you split the UI into independent, reusable pieces, and think about each piece in isolation.

React Advantages:

  • React.js creates its own virtual DOM. This will improve apps performance since JavaScript virtual DOM is faster than the regular DOM.
  • ReactJS helps to create awesome UIs.
  • Awesome for SEO - Generally have trouble in reading Javascript, React.js stands out from the crowd as you can run React.js on the server.
  • Component and Data patterns improve readability which helps to maintain larger apps.
  • React can be used with other frameworks.

Frequently Asked React JS Interview Question & Answers

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Ravindra Savaram
About The Author

Ravindra Savaram is a Content Lead at His passion lies in writing articles on the most popular IT platforms including Machine learning, DevOps, Data Science, Artificial Intelligence, RPA, Deep Learning, and so on. You can stay up to date on all these technologies by following him on LinkedIn and Twitter. Protection Status