How to Use Subconnect in Next.js to Decouple Data Sources for Different Pages

Subconnect is a feature in Next.js that allows you to create a separate connection for a specific page or set of pages within your application. This can be useful if you have different data sources or APIs that need to be accessed by only certain pages in your app.

For example, let's say you have a blog with both public and private articles. You might want to use a separate database or API for the private articles, but still use the same database or API for the public articles. With subconnect, you can create a separate connection for the private articles and use it only when the user is logged in and authorized to view those articles.

Here's an example of how you might use subconnect in a Next.js app:
```
// pages/api/articles.js
import { NextApiRequest, NextApiResponse } from 'next';

const Articles = () => {
// This API endpoint returns all public articles
return {
async get() {
const articles = await fetch('https://my-public-articles.com/api/articles');
return { data: articles };
},
};
};

// pages/api/private-articles.js
import { NextApiRequest, NextApiResponse } from 'next';

const PrivateArticles = () => {
// This API endpoint returns all private articles
return {
async get() {
const articles = await fetch('https://my-private-articles.com/api/articles');
return { data: articles };
},
};
};

// pages/index.js
import { useSubconnect } from 'next/subconnect';

const IndexPage = () => {
// Use the subconnect to get the public articles
const { data: publicArticles } = useSubconnect( Articles );

// Use the subconnect to get the private articles when the user is logged in
const { data: privateArticles } = useSubconnect( PrivateArticles, {
auth: true, // Only allow access when the user is logged in
});

return (

);
};
```
In this example, the `Articles` and `PrivateArticles` APIs are defined as separate subconnects, each with their own data source and authentication requirements. The `IndexPage` component uses the `useSubconnect` hook to fetch the public articles from the `Articles` API, and also uses the `useSubconnect` hook to fetch the private articles from the `PrivateArticles` API when the user is logged in.

By using subconnects in this way, you can decouple the data sources for different pages in your app and manage them independently, while still being able to use the same Next.js API and page rendering infrastructure.