Getting Started

Use Supabase with SvelteKit

Learn how to create a Supabase project, add some sample data to your database, and query the data from a SvelteKit app.


1

Create a Supabase project

Go to database.new and create a new Supabase project.

When your project is up and running, go to the Table Editor, create a new table and insert some data.

Alternatively, you can run the following snippet in your project's SQL Editor. This will create a instruments table with some sample data.

SQL_EDITOR
-- Create the table
create table instruments (
id bigint primary key generated always as identity,
name text not null
);
-- Insert some sample data into the table
insert into instruments (name)
values
('violin'),
('viola'),
('cello');

alter table instruments enable row level security;

Make the data in your table publicly readable by adding an RLS policy:

SQL_EDITOR
create policy "public can read instruments"
on public.instruments
for select to anon
using (true);
2

Create a SvelteKit app

Create a SvelteKit app using the npm create command.

Terminal
npx sv create my-app
3

Install the Supabase client library

The fastest way to get started is to use the supabase-js client library which provides a convenient interface for working with Supabase from a SvelteKit app.

Navigate to the SvelteKit app and install supabase-js.

Terminal
cd my-app && npm install @supabase/supabase-js
4

Create the Supabase client

Create a src/lib directory in your SvelteKit app, create a file called supabaseClient.js and add the following code to initialize the Supabase client with your project URL and public API (anon) key:

Project URL
Anon key
src/lib/supabaseClient.js
import { createClient } from '@supabase/supabase-js'

export const supabase = createClient('https://<project>.supabase.co', '<your-anon-key>')
5

Query data from the app

Use load method to fetch the data server-side and display the query results as a simple list.

Create +page.server.js file in the src/routes directory with the following code.

src/routes/+page.server.js
import { supabase } from "$lib/supabaseClient";

export async function load() {
const { data } = await supabase.from("instruments").select();
return {
instruments: data ?? [],
};
}

Replace the existing content in your +page.svelte file in the src/routes directory with the following code.

src/routes/+page.svelte
<script>
let { data } = $props();
</script>

<ul>
{#each data.instruments as instrument}
<li>{instrument.name}</li>
{/each}
</ul>
6

Start the app

Start the app and go to http://localhost:5173 in a browser and you should see the list of instruments.

Terminal
npm run dev

Next steps