Next.js Example

This project is a note-taking app template built with Next.js, TypeScript, and Tailwind CSS, designed to demonstrate integration with Juno for app development. It showcases authentication, data storage, and file storage using Juno's Satellite container.

You can scaffold it using the following command, or browse the source code:

npm create juno@latest -- --template nextjs-example

Source: github.com/junobuild/create-juno/templates/nextjs-example

---

Folder Structure

nextjs-example/
├── public/                # Static assets
├── src/
│   ├── app/               # Next.js app directory (routing, layout, etc.)
│   ├── components/        # React UI components (auth, table, modal, banner, etc.)
│   ├── types/             # TypeScript types (e.g., note.ts)
├── juno.config.mjs        # Juno Satellite configuration
├── package.json           # Project dependencies and scripts
├── next.config.mjs        # Next.js configuration
├── README.md              # User-facing documentation
└── ...                    # Other config and build files

---

Key Features

• Juno Integration: Uses Juno's Satellite for authentication, Datastore, and Storage.
• Authentication: Login/logout flow.
• Notes Collection: Users can create, view, and delete notes (text, with optional file URL).
• Images Collection: Supports file storage for images.
• Responsive UI: Built with Tailwind CSS for modern styling.
• Banner: Warns if the Satellite is not configured for local development.

---

Main Components

• src/app/: Next.js app directory, handles routing and layout.
• components/: Contains UI and logic for authentication, notes table, modal, banner, etc.
• types/note.ts: TypeScript interface for notes.

---

Data Structure

• NoteData (src/types/note.ts):

export interface NoteData {
  text: string;
  url?: string;
}
export type Note = Doc<NoteData>;

---

How to Run

1. Install dependencies:

npm install

2. Start Juno local emulator:

important

Requires the Juno CLI to be available npm i -g @junobuild/cli

juno dev start

3. Create a Satellite for local dev:

• Visit http://localhost:5866 and follow the instructions.
• Update juno.config.mjs with your Satellite ID.

4. Create required collections:

• notes in Datastore: http://localhost:5866/datastore
• images in Storage: http://localhost:5866/storage

5. Start the frontend dev server (in a separate terminal):

npm run dev

---

Juno-Specific Configuration

• juno.config.mjs: Defines Satellite IDs for development/production, build source, and predeploy steps. See the Configuration reference for details.
• next.config.mjs: Uses the withJuno plugin to load environment variables and inject config automatically at build time. See the Next.js Plugin reference for more information.

---

Production Deployment

• Create a Satellite on the Juno Console for mainnet.
• Update juno.config.mjs with the production Satellite ID.
• Build and deploy:

npm run build
juno deploy

---

Notes

• The app is intended as a starting point for Juno-based projects.
• All logic is in TypeScript and React function components.
• The app is fully client-side (Server Side Rendering is not supported yet) and interacts with Juno via the Satellite container.

---

Juno SDK Used

The following functions from @junobuild/core are used in this example:

Function	Purpose/Description	Where Used (File/Component)	Juno Docs/Source Reference
initSatellite	Initialize Juno Satellite container	src/app/page.tsx	Initialization
authSubscribe	Subscribe to auth state changes	src/components/auth.tsx	Listening to Auth Changes
signIn	Sign in user	src/components/login.tsx	Sign-in
signOut	Sign out user	src/components/logout.tsx	Sign-out
listDocs	List documents in a collection	src/components/table.tsx	List documents
setDoc	Create or update a document	src/components/modal.tsx	Add a document
deleteDoc	Delete a document	src/components/delete.tsx	Delete a document
uploadFile	Upload a file to storage	src/components/modal.tsx	Upload file
deleteAsset	Delete a file from storage	src/components/delete.tsx	Delete asset