What is React

Introduction

React is an open-source, front end, JavaScript library for building user interfaces or UI components. It is maintained by Facebook and a community of individual developers and companies. React can be used to build single-page or mobile applications as a foundation.React initially released 7 years ago on May 29,2013.

How does React work

React creates a VIRTUAL DOM in memory.Instead of directly modifying the browser’s DOM, React builds a virtual DOM in memory and performs all necessary manipulations there before making adjustments to the browser DOM.

What is the Virtual DOM

The virtual DOM (VDOM) is a programming term in which a library like ReactDOM keeps an ideal, or “virtual,” representation of a user interface in memory and syncs it with the “actual” DOM. This is referred to as reconciliation.

This method makes it possible to use React’s declarative API: You tell React what state you want the UI to be in, and it updates the DOM accordingly. This abstracts away the attribute manipulation, event management, and manual DOM updating that you’d have to do otherwise to construct your app.

People use the term “virtual DOM” to mean different things because it is more of a trend than a particular technology. The word “virtual DOM” is commonly associated with React components in the React environment since they are the artifacts that display the user interface. Internal objects called “fibers” are used by React to store additional information about the component tree. They may also be considered a part of React’s “virtual DOM” implementation.

React Renders

React’s method, as previously said, decouples it from the internet. It can be used to build interfaces that work across several platforms. In this scenario, we’ll be using the react-dom renderer. It can render on both the client and server sides.

Available React Renders

• React Native -React Native is a framework and renderer for mobile platforms including iOS and Android. You can also run React Native applications on the web.
• React-blessed -react-blessed allows you to write terminal applications using React. It’s even possible to animate them.
• gl-react- react provides WebGL bindings for React. You can write shaders this way for example.
• react-canvas- react-canvas provides React bindings for the Canvas element.

Benefits of React

• Simplicity

ReactJS is simply easier to understand right away. React is very easy to learn, create a professional web (and mobile) application, and help thanks to its component-based approach, well-defined lifecycle, and use of only plain JavaScript. React makes use of JSX, a special syntax that allows you to combine HTML and JavaScript. This isn’t a requirement; developers can still use plain JavaScript, but JSX is far more user-friendly.

• Easy to use and easy to learn

React is simple to understand for those with a clear understanding of programming, while Angular and Ember are referred to as “Domain-specific Languages,” meaning that they are difficult to learn.
You just need a simple understanding of CSS and HTML to respond.

• Native approch

React can be used to develop mobile apps (React Native). And since React is a firm believer in reusability, it allows for a lot of code reuse. As a result, we can develop apps for iOS, Android, and the web at the same time.

• Reusable components

Components are fantastic, and React is built on top of them. You begin with small steps, which lead to larger steps, which lead to app development. Each component has its own logic and rendering power, and they can be reused anywhere they’re needed. Reusing code makes it easier to create and manage the applications. They also assist you in achieving a consistent look and feel in the project. Although this is a brief summary, using components gives you a significant advantage in your development efforts.

• Data binding

One-way data linking is used in React, and the Flux application architecture manages the flow of data to components through a single control point called the dispatcher. Self-contained components of massive ReactJS apps are easier to debug.

• Performance

There is no notion of a built-in dependency container in React. Browserify, Require JS, EcmaScript 6 modules, which we can use through Babel, and ReactJS-di can all be used to automatically inject dependencies.

• Testability

Testing ReactJS frameworks is a breeze. We can control the state we transfer to the ReactJS view and look at the output and triggered actions, events, functions, and so on by treating React views as functions of the state.

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