Why React is popular ?

ReactJs is an open-source JavaScript library created by Facebook for quickly and easily building rich and engaging web apps with minimal coding. The primary goal of ReactJS is to have the best rendering output possible. Its power stems from its focus on individual components. Rather than operating on the entire web app, ReactJS enables a developer to break down the complex UI into simple components.

ReactJs applications

• Developers may use components to break down complex user interfaces. The concept of components is what distinguishes ReactJs. Instead of thinking about the whole web app, it allows for the complex UI/UX development to be broken down into simpler components. This is critical in making and part more user-friendly.
• Although other frameworks, such as Angular, were available at the time Facebook created ReactJS, most developers were required to do a significant amount of coding. Developers who use other frameworks face the difficulty of having to rework the majority of their code, even while creating components that change frequently.
• It enables developers to build apps in JavaScript. JSX is one of the most useful features that not only make React simple but also enjoyable. Developers can quickly create a new user interface feature and watch it appear in real-time. It inserts HTML code directly into your JS.
• The State allows all changes to be stored in a single section. When using ReactJS, developers collect all of the content that can alter over the course of the application and store it in a single location (State). Since all of the data are sourced from one section, a single web application becomes very easy when using state.
• The Props allow you to populate components with custom data. ReactJS pros allow you to transfer custom data to a specific UI object. This is an excellent way to fill in the blanks when making JSX components.

Features / Advantages:

• Application of HTML and CSS: All in ReactJS is written in JS. HTML structure is represented using JSX, and the latest update includes CSS management within JS as well. VueJS, on the other hand, embraces and builds on traditional web technologies.
• Runtime performance: ReactJS and VueJS both perform admirably in terms of pace. When a component changes in ReactJS, a re-render for the entire component sub-tree is enabled. Try using PureComponents if you don't want to re-render. The dependencies of components in VueJS are monitored automatically during rendering. This ensures that the device is aware of the components that must be re-rendered when the state changes.
• The learning curve: As opposed to AngularJS, the learning curve for a new developer with ReactJS is less steep. In the case of ReactJS, all that is needed is familiarity with JS and HTML. However, learning AngularJS is a time-consuming method that necessitates a thorough understanding of numerous concepts. When compared to ReactJS, less experienced developers often find it difficult to get started with AngularJS.

Because of its ability to break down complex UI and enable users to function on individual components, ReactJS emerges as a stronger framework. However, its direct rival, Vue.JS, is close behind. ReactJS's ability to retain its lead is contingent on potential changes such as daily updates.

Example :

See the Pen React by Mazil Khatib (@mazilkhatib) on CodePen.