Hello! What’s up Guys? As mentioned in the title this is a Comprehensive React.js Guide series where you can learn React from A – Z. So in this series to have a better understanding of React, I’m going to start the series with the Introduction to React. So Then let’s don’t waste time. Let’s get Started!
What is React?
It is noted for its simplicity, flexibility, and performance. React is nowadays one of the most popular frameworks for developing online apps, and it is utilized by many significant organizations such as Netflix, Airbnb, and Dropbox.
Why use React?
- Fast Rendering
- Reusable Components
- Strong Community
- SEO Friendly
- Proficient in Data Binding
- The Virtual DOM
- Great Developer Tool
React.js is noted for its quick rendering capabilities. One of the key reasons underlying this is the virtual DOM. The virtual DOM is a virtual replica of the actual DOM, which is kept in the local memory.
React synchronizes the virtual DOM with the real one using a technique called reconciliation. This procedure joins multiple DOM elements and connects the virtual representation to a virtual operation.
The virtual DOM improves the updating process by ensuring that only the items that need to be modified in the DOM are altered. These changes are provided in bunches, which minimizes superfluous “slow” drawing events and makes React apps more efficient.
When new elements are introduced to the user interface (UI), an entirely new virtual DOM is formed with each element becoming a node on the tree. When you render a JSX element, every single virtual DOM object gets changed. This may appear wasteful, but the cost is small since the virtual DOM can change fast.
In reality, it can create up to 200,000 nodes every second. React’s declarative API also helps with its quickness. By creating code in a declarative style, developers may focus on explaining what they want to do rather than specifying how to achieve it. This method helps React to optimize and make updates more efficiently
Reusable components in React may be constructed to increase the reusable code and make things simpler to maintain. One of the primary benefits associated with React is its ability to construct reusable UI components
When you are creating components which can be reused, React. memo can be used to optimize their re-rendering.
A higher-order component can be utilized to regulate the re-rendering of functional components. By default, React re-renders a component anytime its parent component re-renders. However, React. memo allows you to prevent unwanted re-renders by comparing the old and new props of a component and bypassing the process of rendering if the props haven’t changed
To utilize React. memo, you need to write an arePropsEqual method that evaluates the past and newest props of a component. If the function returns true, then the component will not be re-rendered. This can assist in boosting speed by decreasing the number of needless renders.
Overall, implementing reusable components in React may assist in enhancing the usability of code and make it easier to maintain. By employing capabilities like the virtual DOM and conciliation process, React can also enhance the rendering speed for these components.
Many developers are in the industry to contribute to React’s development and maintenance. Since React.js is an opensource library any person can contribute to its development and maintenance without any doubt. This led to a big and active community of developers who are continually striving to enhance React and build new tools and frameworks that interact with it.
The React community provides a multitude of tools for programmers, including documentation, lessons, and forums where developers may ask problems and get support from other members of the community. That is the main reason, React have a strong community. because it makes it easier to learn React based on their tutorials and documentation.
This community of React.js is also responsible and contributes their effort and time to implement new features and improve the library day by day. This is why React.js stay up to date with the latest trends in the tech industry.
One of the biggest strengths of React.js is having a strong community with them.
To say React is SEO-friendly, there are several reasons. The main factor is that React.js supports server-side-rendering(SSR). SSR assures that the content is displayed on the server before being transmitted to the client, making it less difficult for search engines to crawl and index the page. By leveraging SSR, React may supply search engines with fully rendered HTML content, which is more accessible for indexing.
Additionally, React’s virtual DOM and component-based development add to its SEO-friendliness 2. The virtual DOM improves rendering by updating just the essential components, resulting in quicker page load times. This can significantly affect SEO as search engines regard page speed as a ranking factor.
Proficient in Data Binding
React is proficient at data binding because of backing for one-way data binding. In React, data binding is the process of linking the view element or user interface with the data that populates it. React employs one-way data binding, which implies that any modifications in component data will be reflected in the view, or any modification in the view will be reflected in the component’s data.
React supports multiple techniques for data binding, including specified variables, props, and states. By leveraging these capabilities, developers may synchronize both the data and the user interface, making it easier to maintain and change the application’s status
The Virtual DOM
The virtual DOM is a core notion of React that adds to its rapid rendering capabilities. The virtual DOM is a lightweight duplicate of the actual DOM that is kept in local memory.
React synchronizes the virtual DOM with the real one through a method called reconciliation. This procedure joins distinct DOM classes and aligns the virtual representation to virtual actions.
The virtual DOM improves the process of updating by making sure only the items that need to be modified in the DOM are altered. These changes are provided in bunches, which minimizes superfluous “slow” painting events and makes React apps more efficient.
When new elements are introduced to the user interface (UI), a fresh virtual DOM is formed with each element being a node on the tree. When you display a JSX element, each and every virtual DOM element gets changed. This may appear wasteful, but the cost is small since the virtual DOM can update fast. In reality, it can create up to 200,000 nodes every second.
Greater Developer Tools
There are many reasons for that. First, it gives versatility by enabling you to utilize it on many platforms to design effective user experiences. React is a library, not a framework, which means it may be used to construct components for web applications, static sites, mobile apps using React Native, desktop programs using Electron, and even virtual reality websites and 360 experiences with React VR.
Setting up a React Development Environment
- Install Node.js
- Code Editor or IDE Installation
- Create React APP
- Start the Development Server
2. Code Editor or IDE Installation – A Code editor or IDE is used to code the application. using this programmers or developers will be able to write programs. For here I will be installing VS Code. You can Install any IDE according to your preferences.
3. Create React App – Now you need to create a new React application. Here we will use the officially recommended way. open the command prompt or terminal and navigate to a directory to create an app you can pick any directory on your machine. After navigating to the location, you can run this command to create a new React app.
npx create-react-app my-new-app.
here my-new-app is the React App name. you can use any name as your preference.
4. Start the Development Server – After the React app is created you will be able to run the application. for that, you need to navigate to the React app directory and open the command prompt or terminal from there. to navigate you can use the cd command. here I will use cd my-new-app. To run the application you can use the npm start command.
Once you enter this command your development server will start on port 3000. and you can navigate to http://localhost:3000/ to see the web app on your browser.
That’s it Guys. Next, We will be meeting on the React Components article. Until then Stay safe. Keep learning
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