React is a JavaScript library for creating the Graphical User Interface (GUI) of web applications. It is used specifically for creating mobile application and single page web applications. The code structure in React is constructed in the form of components and class components. The functionality of React employs the Document Object Model (DOM), Virtual DOM, JSX (JavaScript XML), and a number of Lifecycle methods like 'render', 'shouldComponentUpdate', 'componentWillUnmount'.
Features of React
1.JSX
JSX or JavaScript XML, is an extension of the JavaScript language syntax. It allows developers to render components with syntax close to HTML. Even though React components can be constructed using pure JavaScript, JSX is employed because it is simple and simple to read. Babel is pre-processor that transforms HTML-like syntax in JavaScript files into normal JavaScript objects. This incorporation of HTML in JavaScript makes the code easier to read, enhances the performance of JavaScript, and assists in making the overall application more stable.
2.Virtual Document Object Model
React employs an in-memory data structure cache to calculate the difference between the old and new states of the DOM. It re-renders only the required changes rather than re-rendering the entire application. This selective updating process enhances speed and performance to great extent and decreases memory usage.
3.One-Way Data Binding
This feature enables a unidirectional flow of data. This type of mechanism enables more control over the application as the state is stored in specific stores, and other components can remain loosely couple. This structure enables the application to be more flexible and efficient.
4.Testability
In React, views are representation of the state, which dictates the behavior of the component. Therefore, changes can be introduced to the state, which passed to a ReactJS view in order to as certain the resulting output, actions, functions, and events. This simplifies the process of testing and debugging.
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