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Use Juno with Astro

Explore how to create a Juno project developed with Astro.

Table of contents


Learn how to create a satellite, set up a collection, and save data from a Astro app.

1. Set up a satellite and new collection

Create a new satellite in the Juno's console.

After your project is ready, create a collection in your datastore, which we'll call demo, using the console.

2. Create an Astro app

Create a Astro app using the npm create command:

npm create astro@latest myjunoapp

3. Install the Juno SDK core library

Use @junobuild/core client library which provides a convenient interface for working with Juno from a Astro app.

Navigate to the Astro app and install @junobuild/core.

cd myjunoapp && npm i @junobuild/core

4. Insert data from your app

In index.astro, initialize the library with your public satellite ID.

Add an insert function to persist a document.

<!DOCTYPE html>
<html lang="en">
<button id="insert">Insert a document</button>
<p>Document persisted key: <output id="result"></output></p>

import { initJuno, setDoc } from "@junobuild/core";

// Initialize Juno
// TODO: Replace 'satelliteId' with your actual satellite ID
async () => {
await initJuno({
satelliteId: "aaaaa-bbbbb-ccccc-ddddd-cai",
{ once: true }

// Insert a document in Juno's datastore
const insert = async () => {
const doc = await setDoc({
collection: "demo",
doc: {
key: `my-key-${new Date().getTime()}`,
data: {
hello: "world",

const result = document.querySelector("#result");
if (result !== null) {
result.textContent = doc.key;

?.addEventListener("click", insert, { passive: true });

5. Start the app

Start the app, go to http://localhost:4321/ in a browser, click "Insert a document," and you should see the data successfully persisted in your satellite on the blockchain.


If you're looking to deploy your existing app or website developed with Astro and Juno, this guide is for you.

1. Set up a satellite

If you haven't created a satellite yet, go ahead and create a new one in the Juno's console.

2. Install Juno CLI and log in

Install the Juno command line interface by executing the following command in your terminal:

npm i -g @junobuild/cli

After the CLI is ready, log in to your satellite from your terminal to authenticate your device.

juno login

3. Deploy

Build your website:

npm run build

Deploy your project by running the following command from your project’s root folder:

juno deploy

When prompted to provide the name or path of the folder containing your built dapp files, answer dist.

4. Open

Open your browser and you should see your deployed app or website.

juno open