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If you intend to use Juno solely for hosting purposes, you may skip the following steps, which are necessary only for implementing advanced features such as authentication, datastore or storage.

Conversely, if you plan to utilize these rich features, here is how you can connect Juno to your web app.


  1. Install Juno SDK using npm:
npm i @junobuild/core
  1. Initialize your satellite in your web app:
import { initSatellite } from "@junobuild/core";

await initSatellite();

It is generally recommended to initialize the library at the top of your application.

If you are using the the Next.js or Vite plugins, you can start developing or continue with deployment.


No parameters are required to initialize a satellite if you are using plugins, which take care of the environment variables.


The configuration of your project is set in a juno.config ile (TypeScript, JavaScript, or JSON) that exists at the root of your project. The the Next.js or Vite plugins read the file and automatically load the information required to initialize your dApp when you build and run it.

Manually configure your application

If you are not using a plugin, you need to provide the satelliteId when initializing the satellite. Update the initialization as follows:

import { initSatellite } from "@junobuild/core";

await initSatellite({
satelliteId: "your-actual-satellite-id"

Replace the placeholder satelliteId with your actual satellite ID, which can be copied from the console on the overview page.