Learn React The Lazy Way in 2023 (Part 2)

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This part of the “Learn React The Lazy Way” series will delve into essential topics that will take your React skills to the next level.

Find the first part of the tutorial hereĀ 

We’ll explore routing and navigation with React Router, fetching data from APIs, testing and debugging React applications, deploying React apps, and optionally diving into advanced React concepts.

By the end of this article, you’ll have a solid understanding of these crucial areas of React development and be equipped to build robust, efficient, and maintainable web applications.

Routing and Navigation

Introduction to React Router

When building single-page applications (SPAs), routing is vital in managing different views or components.

React Router is a powerful library that provides a declarative way to handle routing in React applications. It allows us to define routes, associate them with specific components, and seamlessly navigate between different views.

Configuring routes in a React application

To set up routes using React Router, we need to configure the routing in our application.

This involves defining the route components and their paths. React Router provides components like BrowserRouter or HashRouter that act as containers for our routes.

We can then define individual routes using the Route component and associate them with specific components.

Navigating between different views

React Router offers navigation components like Link and NavLink to facilitate easy navigation between views.

The Link component allows us to create hyperlinks that navigate to specific routes defined in our application. The NavLink component provides similar functionality but adds active styling to the current active route.

In addition to using these components for navigation, React Router also provides a programmatic way to navigate using the history object.

We can perform navigation based on certain conditions or events by utilizing methods like push or replace from the history object.

Fetching Data from APIs

Making HTTP requests with React

To integrate external data into our React applications, we need to make HTTP requests to APIs.

These requests can include methods like GET, POST, PUT, DELETE, etc. We can request these using the built-in fetch API or popular libraries like Axios. They provide convenient ways to interact with APIs and handle responses.

Using the useEffect hook for data fetching

React’s useEffect hook is a powerful tool for managing side effects in functional components. We can leverage it to fetch data from APIs. By defining the data-fetching logic within the useEffect hook, we can control when the requests are made and update the component state accordingly.

Handling asynchronous operations with async/await

When making asynchronous API calls, we can use the async/await syntax to write cleaner and more readable code.

By marking the enclosing function as async and using the await keyword before the API request, we can wait for the response to be returned before proceeding further. This helps us handle loading and error states more effectively while fetching data.

Testing and Debugging React Applications

Writing unit tests for React components

Testing is a crucial aspect of React development to ensure the reliability and correctness of our components. We can write unit tests to verify the behaviour of individual components. Setting up testing frameworks like Jest and React Testing Library allows us to write and execute tests easily.

Using Jest and React Testing Library

Jest is a popular testing framework that provides various utilities and assertions for testing React components.

React Testing Library is a testing utility that helps simulate user interactions and assert the expected outputs.

With these tools, we can write tests to verify component rendering, behavior, and state management.

Debugging techniques for React applications

While developing React applications, it’s common to encounter issues and errors. To efficiently debug these problems, we can utilize browser developer tools specifically designed for debugging React applications.

These tools allow us to inspect component hierarchies, monitor state changes, and track down the source of errors. We can identify and resolve issues more effectively by leveraging these debugging techniques.

Deploying React Apps

Preparing your React app for deployment

Before deploying a React application, optimising and bundling the code for production is essential.

This involves minimizing file sizes, removing unnecessary dependencies, and configuring build settings to ensure optimal performance.

Hosting options for React applications

Numerous hosting platforms, such as Netlify, Vercel, and Heroku, provide excellent options for deploying React applications. Each platform has its advantages and considerations.

Evaluating factors like ease of use, scalability, cost, and deployment options is crucial to choose the hosting platform that best fits your project’s requirements.

Deploying to platforms like Netlify, Vercel, or Heroku

Deploying a React app to platforms like Netlify, Vercel, or Heroku typically involves a straightforward process.

These platforms provide step-by-step guides to help you configure build settings, connect your code repository, and deploy your application. Following the platform-specific instructions, you can deploy your React app and make it accessible to users.

Get started with Netlify, Vercel and Heroku; also, find detailed tutorials here.

Advanced React Concepts (Optional)

React’s Context API offers a solution for managing the global state within a React application. It allows data to be passed through the component tree without prop drilling.

We can implement global state management using the Context API, providing a centralized way to share data across components.

React performance optimization techniques

Identifying and addressing performance bottlenecks is crucial for creating high-performing React applications.

Techniques such as memoization, lazy loading, and optimizing component rendering can significantly enhance the efficiency of React apps.

Understanding and implementing these optimization techniques can improve user experiences and faster application loading times.

React hooks in-depth

React hooks revolutionized how we write functional components by enabling state and other React features without writing class components.

Exploring additional hooks like useContext and useReducer can expand our understanding of React hooks and their advanced usage patterns. This knowledge allows us to build more sophisticated and efficient React applications.

Code splitting and lazy loading in React

Code splitting is a technique that involves breaking down a React application into smaller chunks and loading them on demand.

By implementing lazy loading, we can defer the loading of components until they are needed, improving the initial load time of our application.

Understanding and applying code splitting and lazy loading techniques can significantly enhance the performance and user experience of React apps.


In this comprehensive guide, we’ve covered key topics in React development, including routing and navigation, data fetching from APIs, testing and debugging, deployment, and advanced concepts.

You’ll be well-equipped to build scalable, efficient, and robust React applications by mastering these areas. Remember to continue exploring additional resources, practising your skills, and working on projects to deepen your understanding of React.

If you find this post exciting, find more exciting posts like this on Learnhub Blog; we write everything tech from Cloud computing to Frontend Dev, Cybersecurity, AI and Blockchain.

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