If you're using Node.js, just run this command in your terminal:

```sh
npm install @supabase/supabase-js
```

For front-end work, pop this script into your HTML file:

```html

```

Use this JavaScript snippet to get your Supabase client up and running with your project's URL and API key:

```javascript
const { createClient } = require('@supabase/supabase-js')
const supabaseUrl = 'https://your-project-url.supabase.co'
const supabaseKey = 'your-public-anon-key'
const supabase = createClient(supabaseUrl, supabaseKey)
```

Use this code to set up a subscription to your table:

```javascript
const realTimeSubscription = supabase
.from('your_table_name')
.on('*', payload => {
console.log('Change received!', payload)
})
.subscribe()
```

Don't forget to replace your_table_name with the actual name of your table.

Customize the function inside .on('*', ...) to handle the incoming data the way you need. For example:

```javascript
const realTimeSubscription = supabase
.from('your_table_name')
.on('INSERT', payload => {
console.log('New row added!', payload.new)
// Update your application state or UI
})
.on('UPDATE', payload => {
console.log('Row updated!', payload.new)
// Update your application state or UI
})
.on('DELETE', payload => {
console.log('Row deleted!', payload.old)
// Update your application state or UI
})
.subscribe()
```

Unsubscribe when you don't need it anymore to free up resources and avoid memory leaks:

```javascript
supabase.removeSubscription(realTimeSubscription)
```

This is handy when you're navigating away from a component or shutting down your app.