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Use Juno with Astro

Explore how to create a Juno project developed with Astro.

Table of contents​

Quickstart​

This guide provides quickstart instructions for integrating Juno in two scenarios: starting a new project and adding Juno to an existing Astro app.

Additionally, it covers how to develop against a production environment or locally.

Path A: Start a new project with a template​

  1. Create a new project using the Juno quickstart CLI:
npm create juno@latest

Path B: Integrate Juno into an existing Next.js app​

  1. Add the Juno SDK:

Navigate to your existing app directory and install Juno SDK:

cd your-existing-app
npm i @junobuild/core

2. Configure Datastore​

Production Path​

To use production, 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.

Local Development Path​

To develop with the local emulator, add a collection named demo within the juno.dev.config.mjs file.

import { defineDevConfig } from "@junobuild/config";

/** @type {import('@junobuild/config').JunoDevConfig} */
export default defineDevConfig(() => ({
  satellite: {
    collections: {
      db: [
        {
          collection: "demo",
          read: "managed",
          write: "managed",
          memory: "stable",
          mutablePermissions: true
        }
      ]
    }
  }
}));
  • Once set, run the local emulator:
juno dev start
  • If the Juno admin CLI (required for deployment, configuration, or to run the emulator) is not installed yet, run:
npm i -g @junobuild/cli

3. Insert data from your app​

In index.astro, initialize the library with the satellite ID you have created for production, or use jx5yt-yyaaa-aaaal-abzbq-cai if you are developing locally with the emulator.

Add an insert function to persist a document.

index.astro
<!doctype html>
<html lang="en">
  <body>
    <main>
      <button id="insert">Insert a document</button>
      <p>Document persisted key: <output id="result"></output></p>

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

        // Initialize Juno
        // TODO: Replace 'satelliteId' with your actual satellite ID
        document.addEventListener(
          "DOMContentLoaded",
          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;
          }
        };

        document
          .querySelector("#insert")
          ?.addEventListener("click", insert, { passive: true });
      </script>
    </main>
  </body>
</html>

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.

Hosting​

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