Welcome back! In the previous lesson, you learned how to manage user sessions using the React Context API. Now, it's time to take the next step in securing your application by protecting routes and implementing logout functionality. This lesson will guide you through ensuring that only authenticated users can access certain parts of your application, enhancing both security and user experience.

In this lesson, you will learn how to protect routes in your application using a custom ProtectedRoute component. This component will check if a user is authenticated before allowing access to specific routes. Here's a sneak peek at the code you'll be working with:

This code snippet demonstrates how to redirect users to the login page if they are not authenticated. You will also learn how to implement a logout feature that clears the user's session, ensuring that sensitive information is not accessible after logging out.

To protect routes in your application, you need to ensure that only authenticated users can access certain pages. This is achieved by checking the user's authentication status before rendering the desired component. If the user is not authenticated, they are redirected to a login page or another appropriate location.

The ProtectedRoute component is a custom component that acts as a gatekeeper for your application's routes. It uses the useAuth hook to access the authentication status, specifically checking for the presence of a token. If the token is not present, indicating that the user is not authenticated, the component redirects the user to the login page using the Navigate component from react-router-dom. If the user is authenticated, the ProtectedRoute component renders the child components, allowing access to the protected route.

To use the ProtectedRoute component, wrap it around the components or routes you want to protect. For example:

In this example, the Dashboard component is wrapped with the ProtectedRoute component. This ensures that only authenticated users can access the /dashboard route. If a user tries to access the dashboard without being authenticated, they will be redirected to the /login page.

Implementing a logout feature is essential for allowing users to securely end their sessions. The logout functionality typically involves clearing the user's session data, such as the authentication token, and redirecting the user to a public page, like the login page.

Here's an example of how you can implement a logout function using the useAuth hook:

In this example, the LogoutButton component provides a button that, when clicked, clears the authentication token using the setToken function from the useAuth hook. After clearing the token, it redirects the user to the login page using the useNavigate hook from react-router-dom.

Protecting routes is crucial for maintaining the security of your application. By ensuring that only authenticated users can access certain pages, you prevent unauthorized access to sensitive information. Additionally, implementing a logout functionality is essential for allowing users to end their sessions securely. These features are fundamental in building robust and secure web applications, providing users with a safe and reliable experience.

Are you ready to enhance the security of your application? Let's dive into the practice section and start implementing these important features!