JavaScript & TypeScript SDK for libSQL

This is the source repository of the JavaScript & TypeScript SDK for libSQL. You can use it to interact with the following types of databases:

• Local SQLite database files
• libSQL sqld instances (including Turso)

Installation

npm install @libsql/client

This step is not required if using the Deno style import shown below.

Create a database client object

Importing

There are multiple ways to import the module. For Node.js and other environments where you need to use a local SQLite file URL, as well as network access to sqld:

import { createClient } from "@libsql/client";

For environments that don't have a local filesystem, but support HTTP or WebSockets, including:

• Browsers
• CloudFlare Workers
• Netlify Edge Functions

import { createClient } from "@libsql/client/web";

For environments that only support HTTP, including Vercel Edge Functions:

import { createClient } from "@libsql/client/http";

For Deno:

// replace [version] with the client version
import { createClient } from "https://esm.sh/@libsql/client@[version]/web";

In each case, the client API is the same, with the exception that HTTP URLs don't support interactive transactions.

Local SQLite files

To connect to a local SQLite database file using a local file URL:

const config = {
  url: "file:local.db"
};
const db = createClient(config);
const rs = await db.execute("SELECT * FROM users");
console.log(rs);

libSQL sqld instance

To connect to a libSQL sqld instance using a WebSocket URL or HTTP URL:

import { createClient } from "@libsql/client"

const config = {
  url: "libsql://[your-sqld-host]",
  authToken: "[your-token]"
};
const db = createClient(config);
const rs = await db.execute("SELECT * FROM users");
console.log(rs);

If you are querying a sqld instance on your local machine, use the ws: URL it provides.

authToken in the config object is a token that your sqld instance recognizes to allow client access. For Turso databases, a token is obtained using the Turso CLI. No token is required by default when running sqld on its own.

Supported URLs

The client can connect to the database using different methods depending on the scheme (protocol) of the passed URL:

Local SQLite file URLs

A file: URL connects to a local SQLite database (using better-sqlite3).

• This is only supported on Node.js. It will not work in the browser or with most hosted environments that don't provide access to a local filesystem.
• file:/absolute/path or file:///absolute/path is an absolute path on local filesystem.
• file:relative/path is a relative path on local filesystem.
• file://path is not a valid URL.

libSQL sqld instances

WebSocket URLs

ws:, wss:, or libsql: URLs use a stateful WebSocket to connect to sqld.

• libsql: always uses wss: internally (using TLS at the transport layer).
• WebSockets are implemented using the Hrana protocol implemented by hrana-client-ts.
• WebSockets are supported in Node.js and browser.
• If you are running in a cloud or edge hosted environments, you should check to see if WebSockets are supported. If not, change the URL to use an HTTP URL.

HTTP URLs

https: or https: URLs connect to sqld using HTTP.

• This is supported in Node.js and in every environment that supports the web fetch API.
• Interactive transactions using transaction() are not supported over HTTP, as it requires a stateful connection to the server.

Additional documentation

You can find more examples of how to use this library using the Turso docs for JS&TS.

License

This project is licensed under the MIT license.

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in @libsql/client by you, shall be licensed as MIT, without any additional terms or conditions.