I'll create a loading page that transitions to a dashboard when a process completes. We'll use React with Next.js and implement a simulated loading process. The loading page will display a progress bar, and once it reaches 100%, it will transition to the dashboard.

Let's create the components:

This code creates a loading page that transitions to a dashboard when a simulated process completes. Here's how it works:

1. The Home component manages the loading state and progress.
2. It starts with loading set to true and progress at 0.
3. A useEffect hook simulates a loading process by incrementing the progress every 500ms.
4. The LoadingPage component displays a progress bar and percentage.
5. When the progress reaches 100%, there's a brief delay before setting loading to false.
6. Once loading is false, the Dashboard component is rendered.
7. A CSS transition provides a smooth fade effect between the loading page and dashboard.

To use this in your Next.js project:

1. Make sure you have the necessary dependencies installed, including @radix-ui/react-progress for the Progress component.
2. Copy these files into your project structure.
3. Run your Next.js development server.

You should see a loading page with a progress bar that fills up over a few seconds, then transitions smoothly to the dashboard view. You can customize the dashboard content and styling to fit your specific needs.

You're right, and I see the issue now. The loading bar doesn't appear immediately because we're using client-side rendering, and the initial state is empty. Let's fix this by using Next.js's App Router features and adding a loading state that appears immediately. We'll also improve the transition between the loading state and the dashboard.

Here's the updated version:

Here's what's changed and how it works now:

1. We've moved the components into the app directory to use the App Router.
2. We've created a loading.tsx file that will be shown immediately when the page starts loading. This ensures that users see a loading state right away.
3. In page.tsx, we're using Suspense to handle the loading state. The LoadingSimulation component simulates a 5-second loading process using a while loop. This is just for demonstration; in a real app, this would be replaced with actual data fetching or processing.
4. The Suspense fallback is set to <LoadingPage progress={0} />, which will be shown while LoadingSimulation is running.
5. After LoadingSimulation completes, the Dashboard component will be rendered.

This approach ensures that:

• Users see a loading state immediately when they navigate to the page.
• The loading state persists for a set amount of time (5 seconds in this case), simulating a process completion.
• Once the simulated process is complete, the dashboard is displayed.

To use this in your Next.js project:

1. Make sure you're using Next.js 13 or later with the App Router.
2. Install the necessary dependencies, including @radix-ui/react-progress for the Progress component.
3. Copy these files into your project structure within the app directory.
4. Run your Next.js development server.

You should now see the loading bar appear immediately when you navigate to the page, persist for 5 seconds, and then transition to the dashboard view. The loading progress bar won't actually progress in this example, but you can modify the LoadingSimulation component to update the progress if desired.