Significant Features of React JS
- One-way Data Binding – This refers to a unidirectional data flow from top to bottom. That is from the parent components to the child components. The child component cannot transfer its properties to the parent component but it can have communication with the parent components.
- Performance – React JS ensures optimum performance as it uses a virtual DOM and updates only the modified parts. In addition, DOM executes in memory and allows users to create separate components which makes the DOM run faster.
- Extension – React JS comes with many extensions that are useful for creating full-fledged UI applications. In addition, these extensions are useful for mobile app development. They also help in providing server-side rendering. React comes with extensions like Flux, Redux, React Native, etc.
- Components – This software solution follows a component-based architecture and it distributes the web page into multiple components. Each component in it is a part of the UI design which has its own logic and design as shown in the below image.
What are the Benefits of Using React JS?
- React JS has declarative applications.
- It comes with JSX and virtual DOM to boost user experiences.
- This is a social platform with a large community of designers and developers.
React JS Interview Questions and Answers for Freshers
Here are some of the most common interview questions about React JS.
What are the advantages of React?
The advantages of React are as follows.
- React JS ensures faster rendering.
- It is very SEO-friendly.
- React JS makes web pages dynamic and responsive.
- It is useful for the development of both web and mobile apps.
- Capable of integrating with other frameworks.
How is Virtual DOM different from the real DOM?
Real DOM wraps the HTML elements in a tree-structured object and represents the document as nodes and objects. On the other hand, virtual DOM is similar to the real DOM but it can’t write and display things on the screen like Real DOM.
What are the four phases of the ReactJS component lifestyle?
The four phases are Initialization, Mounting, Updating, and Unmounting. Initialization is the first stage that constructs components with the provided properties and a default state. The mounting phase involves putting elements into the DOM. The updating phase updates the stage of a component and repaints the application. The last phase unmounting removes the components from the page.
What is the purpose of the render function () in React?
The render () function in React is useful for displaying the specified HTML code inside the specified HTML