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<br />
<p align="center">
  <a href="https://supabase.io">
        <picture>
      <source media="(prefers-color-scheme: dark)" srcset="https://raw.githubusercontent.com/supabase/supabase/master/packages/common/assets/images/supabase-logo-wordmark--dark.svg">
      <source media="(prefers-color-scheme: light)" srcset="https://raw.githubusercontent.com/supabase/supabase/master/packages/common/assets/images/supabase-logo-wordmark--light.svg">
      <img alt="Supabase Logo" width="300" src="https://raw.githubusercontent.com/supabase/supabase/master/packages/common/assets/images/logo-preview.jpg">
    </picture>
  </a>
  <h1 align="center">Supabase PostgREST JS SDK</h1>

  <h3 align="center">Isomorphic JavaScript SDK for <a href="https://postgrest.org">PostgREST</a> with an ORM-like interface.</h3>

  <p align="center">
    <a href="https://supabase.com/docs/guides/database">Guides</a>
    ·
    <a href="https://supabase.com/docs/reference/javascript/select">Reference Docs</a>
    ·
    <a href="https://supabase.github.io/supabase-js/postgrest-js/v2/spec.json">TypeDoc</a>
  </p>
</p>
<div align="center">

[![Build](https://github.com/supabase/supabase-js/workflows/CI/badge.svg)](https://github.com/supabase/supabase-js/actions?query=branch%3Amaster)
[![Package](https://img.shields.io/npm/v/@supabase/postgrest-js)](https://www.npmjs.com/package/@supabase/postgrest-js)
[![License: MIT](https://img.shields.io/npm/l/@supabase/supabase-js)](#license)
[![pkg.pr.new](https://pkg.pr.new/badge/supabase/postgrest-js)](https://pkg.pr.new/~/supabase/postgrest-js)

</div>

### Quick start

Install

```bash
npm install @supabase/postgrest-js
```

Usage

```js
import { PostgrestClient } from '@supabase/postgrest-js'
const REST_URL = 'http://localhost:3000'
const postgrest = new PostgrestClient(REST_URL)
```

- [select()](https://supabase.com/docs/reference/javascript/select)
- [insert()](https://supabase.com/docs/reference/javascript/insert)
- [update()](https://supabase.com/docs/reference/javascript/update)
- [delete()](https://supabase.com/docs/reference/javascript/delete)

#### Custom `fetch` implementation

`postgrest-js` uses the runtime's global `fetch` to make HTTP requests, but an alternative `fetch` implementation can be provided as an option. This is useful in environments where the global `fetch` is unavailable or where you want to customize request behavior:

```js
import { PostgrestClient } from '@supabase/postgrest-js'
const REST_URL = 'http://localhost:3000'
const postgrest = new PostgrestClient(REST_URL, {
  fetch: (...args) => fetch(...args),
})
```

## Development

This package is part of the [Supabase JavaScript monorepo](https://github.com/supabase/supabase-js). To work on this package:

### Building

```bash
# Build (from monorepo root)
pnpm nx build postgrest-js
# Build with watch mode for development
pnpm nx build:watch postgrest-js
# TypeScript type checking
pnpm nx type-check postgrest-js
# Generate documentation
pnpm nx docs postgrest-js
```

### Testing

**Supabase CLI Required!** The `postgrest-js` tests use the [Supabase CLI](https://supabase.com/docs/guides/local-development/cli/getting-started) to run a local PostgreSQL database and PostgREST server.

#### Quick Start

```bash
# Run all tests (from monorepo root)
pnpm nx test:ci:postgrest postgrest-js
```

This single command automatically:

1. Stops any existing Supabase CLI containers
2. Starts PostgreSQL database and PostgREST server via Supabase CLI
3. Resets and seeds the database
4. Runs all Jest unit tests with coverage
5. Cleans up containers

#### Individual Test Commands

```bash
# Run Jest tests with coverage (requires infrastructure running)
pnpm nx test:run postgrest-js
# Run type tests with tstyche
pnpm nx test:types postgrest-js
# Run smoke tests (CommonJS and ESM imports)
pnpm nx test:smoke postgrest-js
# Format code
pnpm nx format postgrest-js
# Check formatting
pnpm nx format:check postgrest-js
```

#### Test Infrastructure

The tests use Supabase CLI to spin up:

- **PostgreSQL** - Database with test schema and seed data (port 54322)
- **PostgREST** - REST API server that the client connects to (port 54321)

```bash
# Manually manage test infrastructure (from monorepo root)
pnpm nx test:infra postgrest-js      # Start containers
pnpm nx test:clean-pre postgrest-js  # Stop and remove containers
```

Or directly via Supabase CLI:

```bash
cd packages/core/postgrest-js
npx supabase --workdir ./test start        # Start all services
npx supabase --workdir ./test db reset     # Reset and seed database
npx supabase --workdir ./test stop         # Stop all services
```

#### Regenerating TypeScript Types

When the database schema changes, regenerate TypeScript types from the actual database:

```bash
# From the monorepo root
pnpm run codegen:postgrest
```

This command automatically:

1. Cleans up any existing Supabase containers
2. Starts Supabase (PostgreSQL, PostgREST, and all services)
3. Generates TypeScript types from the database schema
4. Post-processes the generated types (updates JSON type definitions)
5. Formats the generated file with Prettier
6. Cleans up Supabase containers

The generated types are written to `test/types.generated.ts`.

#### Test Types Explained

- **Unit Tests** - Jest tests covering all client functionality (`pnpm nx test:run postgrest-js`)
- **Type Tests** - Validates TypeScript types using tstyche (`pnpm nx test:types postgrest-js`)
- **Smoke Tests** - Basic import/require tests for CommonJS and ESM (`pnpm nx test:smoke postgrest-js`)

#### Prerequisites

- **Supabase CLI** must be installed ([instructions](https://supabase.com/docs/guides/local-development/cli/getting-started)) or can be used through `npx` (`npx supabase`)
- **Docker** must be installed and running (Supabase CLI uses Docker under the hood)
- **Port 54321** - PostgREST API
- **Port 54322** - PostgreSQL database
- **Port 54323** - Supabase Studio (used for type generation)

#### PostgREST v12 Backward Compatibility Tests

We maintain backward compatibility tests for PostgREST v12 (the current Supabase CLI uses v14+). These tests ensure the SDK works correctly for users still running older PostgREST versions.

```bash
# Run v12 compatibility tests (requires Docker)
pnpm nx test:ci:v12 postgrest-js
```

This command:

1. Starts PostgREST v12 + PostgreSQL in Docker (ports 3012/5433)
2. Runs runtime tests that verify v12-specific behavior
3. Cleans up containers

**Type-only tests** for v12 compatibility also run as part of the regular type tests:

```bash
pnpm nx test:types postgrest-js  # Includes v12-compat.test-d.ts
```

**Note:** These v12 tests will be removed when v3 ships (sometime in 2026).

### Contributing

We welcome contributions! Please see our [Contributing Guide](../../../CONTRIBUTING.md) for details on how to get started.

For major changes or if you're unsure about something, please open an issue first to discuss your proposed changes.

## License

This repo is licensed under MIT License.

	<br />
	<p align="center">
	<a href="https://supabase.io">
	<picture>
	<source media="(prefers-color-scheme: dark)" srcset="https://raw.githubusercontent.com/supabase/supabase/master/packages/common/assets/images/supabase-logo-wordmark--dark.svg">
	<source media="(prefers-color-scheme: light)" srcset="https://raw.githubusercontent.com/supabase/supabase/master/packages/common/assets/images/supabase-logo-wordmark--light.svg">
	<img alt="Supabase Logo" width="300" src="https://raw.githubusercontent.com/supabase/supabase/master/packages/common/assets/images/logo-preview.jpg">
	</picture>
	</a>

	<h1 align="center">Supabase PostgREST JS SDK</h1>

	<h3 align="center">Isomorphic JavaScript SDK for <a href="https://postgrest.org">PostgREST</a> with an ORM-like interface.</h3>

	<p align="center">
	<a href="https://supabase.com/docs/guides/database">Guides</a>
	·
	<a href="https://supabase.com/docs/reference/javascript/select">Reference Docs</a>
	·
	<a href="https://supabase.github.io/supabase-js/postgrest-js/v2/spec.json">TypeDoc</a>
	</p>
	</p>

	<div align="center">

	[![Build](https://github.com/supabase/supabase-js/workflows/CI/badge.svg)](https://github.com/supabase/supabase-js/actions?query=branch%3Amaster)
	[![Package](https://img.shields.io/npm/v/@supabase/postgrest-js)](https://www.npmjs.com/package/@supabase/postgrest-js)
	[![License: MIT](https://img.shields.io/npm/l/@supabase/supabase-js)](#license)
	[![pkg.pr.new](https://pkg.pr.new/badge/supabase/postgrest-js)](https://pkg.pr.new/~/supabase/postgrest-js)

	</div>

	### Quick start

	Install

	```bash
	npm install @supabase/postgrest-js
	```

	Usage

	```js
	import { PostgrestClient } from '@supabase/postgrest-js'

	const REST_URL = 'http://localhost:3000'
	const postgrest = new PostgrestClient(REST_URL)
	```

	- [select()](https://supabase.com/docs/reference/javascript/select)
	- [insert()](https://supabase.com/docs/reference/javascript/insert)
	- [update()](https://supabase.com/docs/reference/javascript/update)
	- [delete()](https://supabase.com/docs/reference/javascript/delete)

	#### Custom `fetch` implementation

	`postgrest-js` uses the runtime's global `fetch` to make HTTP requests, but an alternative `fetch` implementation can be provided as an option. This is useful in environments where the global `fetch` is unavailable or where you want to customize request behavior:

	```js
	import { PostgrestClient } from '@supabase/postgrest-js'

	const REST_URL = 'http://localhost:3000'
	const postgrest = new PostgrestClient(REST_URL, {
	fetch: (...args) => fetch(...args),
	})
	```

	## Development

	This package is part of the [Supabase JavaScript monorepo](https://github.com/supabase/supabase-js). To work on this package:

	### Building

	```bash
	# Build (from monorepo root)
	pnpm nx build postgrest-js

	# Build with watch mode for development
	pnpm nx build:watch postgrest-js

	# TypeScript type checking
	pnpm nx type-check postgrest-js

	# Generate documentation
	pnpm nx docs postgrest-js
	```

	### Testing

	Supabase CLI Required! The `postgrest-js` tests use the [Supabase CLI](https://supabase.com/docs/guides/local-development/cli/getting-started) to run a local PostgreSQL database and PostgREST server.

	#### Quick Start

	```bash
	# Run all tests (from monorepo root)
	pnpm nx test:ci:postgrest postgrest-js
	```

	This single command automatically:

	1. Stops any existing Supabase CLI containers
	2. Starts PostgreSQL database and PostgREST server via Supabase CLI
	3. Resets and seeds the database
	4. Runs all Jest unit tests with coverage
	5. Cleans up containers

	#### Individual Test Commands

	```bash
	# Run Jest tests with coverage (requires infrastructure running)
	pnpm nx test:run postgrest-js

	# Run type tests with tstyche
	pnpm nx test:types postgrest-js

	# Run smoke tests (CommonJS and ESM imports)
	pnpm nx test:smoke postgrest-js

	# Format code
	pnpm nx format postgrest-js

	# Check formatting
	pnpm nx format:check postgrest-js
	```

	#### Test Infrastructure

	The tests use Supabase CLI to spin up:

	- PostgreSQL - Database with test schema and seed data (port 54322)
	- PostgREST - REST API server that the client connects to (port 54321)

	```bash
	# Manually manage test infrastructure (from monorepo root)
	pnpm nx test:infra postgrest-js # Start containers
	pnpm nx test:clean-pre postgrest-js # Stop and remove containers
	```

	Or directly via Supabase CLI:

	```bash
	cd packages/core/postgrest-js
	npx supabase --workdir ./test start # Start all services
	npx supabase --workdir ./test db reset # Reset and seed database
	npx supabase --workdir ./test stop # Stop all services
	```

	#### Regenerating TypeScript Types

	When the database schema changes, regenerate TypeScript types from the actual database:

	```bash
	# From the monorepo root
	pnpm run codegen:postgrest
	```

	This command automatically:

	1. Cleans up any existing Supabase containers
	2. Starts Supabase (PostgreSQL, PostgREST, and all services)
	3. Generates TypeScript types from the database schema
	4. Post-processes the generated types (updates JSON type definitions)
	5. Formats the generated file with Prettier
	6. Cleans up Supabase containers

	The generated types are written to `test/types.generated.ts`.

	#### Test Types Explained

	- Unit Tests - Jest tests covering all client functionality (`pnpm nx test:run postgrest-js`)
	- Type Tests - Validates TypeScript types using tstyche (`pnpm nx test:types postgrest-js`)
	- Smoke Tests - Basic import/require tests for CommonJS and ESM (`pnpm nx test:smoke postgrest-js`)

	#### Prerequisites

	- Supabase CLI must be installed ([instructions](https://supabase.com/docs/guides/local-development/cli/getting-started)) or can be used through `npx` (`npx supabase`)
	- Docker must be installed and running (Supabase CLI uses Docker under the hood)
	- Port 54321 - PostgREST API
	- Port 54322 - PostgreSQL database
	- Port 54323 - Supabase Studio (used for type generation)

	#### PostgREST v12 Backward Compatibility Tests

	We maintain backward compatibility tests for PostgREST v12 (the current Supabase CLI uses v14+). These tests ensure the SDK works correctly for users still running older PostgREST versions.

	```bash
	# Run v12 compatibility tests (requires Docker)
	pnpm nx test:ci:v12 postgrest-js
	```

	This command:

	1. Starts PostgREST v12 + PostgreSQL in Docker (ports 3012/5433)
	2. Runs runtime tests that verify v12-specific behavior
	3. Cleans up containers

	Type-only tests for v12 compatibility also run as part of the regular type tests:

	```bash
	pnpm nx test:types postgrest-js # Includes v12-compat.test-d.ts
	```

	Note: These v12 tests will be removed when v3 ships (sometime in 2026).

	### Contributing

	We welcome contributions! Please see our [Contributing Guide](../../../CONTRIBUTING.md) for details on how to get started.

	For major changes or if you're unsure about something, please open an issue first to discuss your proposed changes.

	## License

	This repo is licensed under MIT License.