Connect a Sveltekit application to Neon

Sveltekit is a modern JavaScript framework that compiles your code to tiny, framework-less vanilla JS. This guide explains how to connect Sveltekit with Neon using a secure server-side request.

To create a Neon project and access it from a Sveltekit application:

1. Create a Neon project
2. Create a Sveltekit project and add dependencies
3. Configure a Postgres client
4. Run the app

Create a Neon project

If you do not have one already, create a Neon project. Save your connection details including your password. They are required when defining connection settings.

1. Navigate to the Projects page in the Neon Console.
2. Click New Project.
3. Specify your project settings and click Create Project.

Create a Sveltekit project and add dependencies

1. Create a Sveltekit project using the following commands:

   npx sv create my-app --template minimal --no-add-ons --types ts
   cd my-app

2. Add project dependencies using one of the following commands:

   Neon serverless driver

   postgres.js

   node-postgres

   npm install @neondatabase/serverless dotenv

Store your Neon credentials

Add a .env file to your project directory and add your Neon connection string to it. You can find the connection string for your database in the Connection Details widget on the Neon Dashboard. For more information, see Connect from any application.

DATABASE_URL="postgresql://<user>:<password>@<endpoint_hostname>.neon.tech:<port>/<dbname>?sslmode=require"

Configure the Postgres client

There are two parts to connecting a SvelteKit application to Neon. The first is db.server.ts, which contains the database configuration. The second is the server-side route where the connection to the database will be used.

db.server

Create a db.server.ts file at the root of your /src directory and add the following code snippet to connect to your Neon database:

import 'dotenv/config';
import { neon } from '@neondatabase/serverless';

const connectionString: string = process.env.DATABASE_URL as string;

const sql = neon(connectionString);
export { sql };

route

Create a +page.server.ts file in your route directory and import the database configuration:

import { sql } from '../db.server';

export async function load() {
  const response = await sql`SELECT version()`;
  const { version } = response[0];
  return {
    version,
  };
}

Page Component

Create a +page.svelte file to display the data:

<script>
    export let data;
</script>

<h1>Database Version</h1>
<p>{data.version}</p>

Run the app

When you run npm run dev you can expect to see the following on localhost:5173:

Database Version
PostgreSQL 17.2 on x86_64-pc-linux-gnu, compiled by gcc (Debian 12.2.0-14) 12.2.0, 64-bit

Source code

You can find the source code for the application described in this guide on GitHub.

• Get started with Sveltekit and Neon

  Get started with Sveltekit and Neon