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Why do we use react JS on the website_.pdf
- 1. Why do we use react JS on the website? React is a JavaScript library for building user interfaces. It is widely used in web development for creating interactive and reusable UI components. Some of the key benefits of using React are: 1. Reusable components: React allows developers to create reusable UI components, making it easier to maintain and update the code. 2. Virtual DOM: React uses a virtual DOM (Document Object Model), which increases the application's performance by limiting the amount of DOM manipulation required. 3. Server-side rendering: React can be used for server-side rendering, which can improve the loading speed of a web page. 4. Easy to learn: React has a simple and intuitive API, making it easier for developers to learn and use. 5. Community support: React has a large and active community of developers, providing a wealth of resources and support for users. Overall, React helps developers build fast and efficient web applications that offer a great user experience. Reusable components: Reusable components are used in React because they offer several benefits: 1. Consistency: Reusable components ensure that the same design patterns and functionality are used consistently across an application, leading to a more cohesive and user-friendly interface. 2. Maintenance: Reusable components make it easier to maintain and update the code, as changes made to a single component will affect all instances of that component in the application. 3. Increased efficiency: Reusing components saves time and reduces the amount of code that needs to be written, making the development process more efficient. 4. Improved readability: Reusable components can make the code more readable and understandable, especially for other developers who are working on the project.
- 2. 5. Testability: Reusable components can be more easily tested and debugged, as they can be isolated and tested in isolation from the rest of the application. By using reusable components, React developers can create modular, scalable, and maintainable web applications. Virtual DOM Virtual DOM is a concept used in React to improve the performance of web applications. It's a lightweight in-memory representation of the actual Document Object Model (DOM) used by browsers to render web pages. When a change is made to the UI in a React application, instead of updating the actual DOM directly, React updates the Virtual DOM. The Virtual DOM then calculates the most efficient way to update the actual DOM, reducing the amount of DOM manipulation required and improving the application's overall performance. Virtual DOM makes React applications faster and more efficient, especially for complex and dynamic UIs. It also abstracts away the complexities of working with the DOM, making it easier for developers to focus on building the application logic. Overall, the Virtual DOM is an important part of React and helps to make it a powerful and efficient tool for building web applications. Server-side rendering Server-side rendering (SSR) is a technique used in web development where the server generates the HTML for a web page and sends it to the client's browser, as opposed to rendering the HTML client-side using JavaScript. In React, server-side rendering can improve the performance of web applications by reducing the initial loading time of a page. When using SSR, the initial HTML of the page is generated on the server and sent to the client, allowing the page to display content much faster. SSR also has other benefits, such as improving the SEO (search engine optimization) of a web page and reducing the amount of JavaScript required to render the page, making it more accessible to users with slow internet connections.
- 3. In summary, server-side rendering is an important technique for improving the performance and accessibility of web applications, and React provides support for it through its server-side rendering API.