Use Supabase with React

1. Create a Supabase project#

Before you can use Supabase, you need a Supabase project. You can create a project visually in the Dashboard or programmatically using the Management API.

2. Set up your database#

When your Supabase project is up and running, create an instruments table with some sample data.

Then set a secure baseline by setting only the privileges each Postgres role needs, add Row Level Security (RLS) for enhanced security for database data by default, and create an RLS policy to make the data in your table publicly readable.

You can click this button to prefill all the SQL needed in the SQL editor of your project in the Dashboard.

3. Create a React app#

Create a React app using a Vite template.

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npm create vite@latest my-app -- --template react

4. 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 React app.

Navigate to the React app and install supabase-js.

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

Get API details#

To interact with data in database tables, you use the client libraries that wrap the auto-generated Data API endpoints, authenticating using the Project URL and key from the project Connect dialog.

5. Declare Supabase environment variables#

Create a .env.local file and populate it with your Supabase connection variables that you can get from the helper above, or from the project Connect panel:

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VITE_SUPABASE_URL=<SUBSTITUTE_SUPABASE_URL>
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VITE_SUPABASE_PUBLISHABLE_KEY=<SUBSTITUTE_SUPABASE_PUBLISHABLE_KEY>

6. Query data from the app#

Replace the contents of App.jsx with a getInstruments function that fetches the data and displays the query result on the page using a Supabase client.

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import { createClient } from '@supabase/supabase-js'
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import { useEffect, useState } from 'react'
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const supabase = createClient(
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  import.meta.env.VITE_SUPABASE_URL,
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  import.meta.env.VITE_SUPABASE_PUBLISHABLE_KEY
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)
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function App() {
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  const [instruments, setInstruments] = useState([])
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  useEffect(() => {
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    getInstruments()
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  }, [])
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  async function getInstruments() {
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    const { data, error } = await supabase.from('instruments').select()
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    if (error) {
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      console.error(error)
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      return
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    }
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    setInstruments(data)
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  }
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  return (
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    <ul>
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      {instruments.map((instrument) => (
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        <li key={instrument.name}>{instrument.name}</li>
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      ))}
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    </ul>
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  )
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}
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export default App

7. Start the app#

Run the development server, go to http://localhost:5173 in a browser, and you should see the list of instruments.

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npm run dev

Next steps#

• Set up Auth for your app
• Insert more data into your database
• Upload and serve static files using Storage