SQLite WASM

SQLite WASM conveniently wrapped as an ES Module. It includes the sqlite-sync, sqlite-vector, and sqlite-memory extensions that are automatically loaded at runtime. TypeScript types are from the official sqlite-wasm repository.

Features

• 🚀 SQLite WASM wrapped as an ES Module
• 🔄 Includes sqlite-sync, sqlite-vector, and sqlite-memory extensions
• 📝 Full TypeScript support
• 💾 OPFS (Origin Private File System) support for persistent storage
• ⚡ Worker thread support for better performance

Installation

npm install @sqliteai/sqlite-wasm

Vite Configuration

If you are using Vite, you need to add the following configuration options to your vite.config.js:

import { defineConfig } from 'vite';

export default defineConfig({
  server: {
    headers: {
      'Cross-Origin-Opener-Policy': 'same-origin',
      'Cross-Origin-Embedder-Policy': 'require-corp',
    },
  },
  optimizeDeps: {
    exclude: ['@sqliteai/sqlite-wasm'],
  },
});

💡 Example: Check out the sport-tracker-app example to see SQLite WASM in action with a worker thread implementation.

Usage

There are three ways to use SQLite WASM:

1. Wrapped Worker - Uses a wrapped worker (recommended)
2. Direct Worker - Uses a direct worker implementation
3. Main Thread - Runs in the main thread ⚠️ sqlite-sync does not work in the main thread

💡 Note: Only the worker versions support the Origin Private File System (OPFS) storage backend for persistent data storage.

Wrapped Worker (with OPFS Support)

[!Warning]

For this to work, you need to set the following headers on your server:

Cross-Origin-Opener-Policy: same-origin

Cross-Origin-Embedder-Policy: require-corp

import { sqlite3Worker1Promiser } from '@sqliteai/sqlite-wasm';

const log = console.log;
const error = console.error;

const initializeSQLite = async () => {
  try {
    log('Loading and initializing SQLite3 module...');

    const promiser = await new Promise((resolve) => {
      const _promiser = sqlite3Worker1Promiser({
        onready: () => resolve(_promiser),
      });
    });

    log('Done initializing. Running demo...');

    const configResponse = await promiser('config-get', {});
    log('Running SQLite3 version', configResponse.result.version.libVersion);

    const openResponse = await promiser('open', {
      filename: 'file:mydb.sqlite3?vfs=opfs',
    });
    const { dbId } = openResponse;
    log(
      'OPFS is available, created persisted database at',
      openResponse.result.filename.replace(/^file:(.*?)\?vfs=opfs$/, '$1'),
    );
    // Your SQLite code here.
  } catch (err) {
    if (!(err instanceof Error)) {
      err = new Error(err.result.message);
    }
    error(err.name, err.message);
  }
};

initializeSQLite();

📚 API Reference: The promiser object implements the Worker1 API.

Direct Worker (with OPFS Support)

[!Warning]

For this to work, you need to set the following headers on your server:

Cross-Origin-Opener-Policy: same-origin

Cross-Origin-Embedder-Policy: require-corp

Main thread (main.js):

const worker = new Worker('worker.js', { type: 'module' });

Worker thread (worker.js):

import sqlite3InitModule from '@sqliteai/sqlite-wasm';

const log = console.log;
const error = console.error;

const start = (sqlite3) => {
  log('Running SQLite3 version', sqlite3.version.libVersion);
  const db =
    'opfs' in sqlite3
      ? new sqlite3.oo1.OpfsDb('/mydb.sqlite3')
      : new sqlite3.oo1.DB('/mydb.sqlite3', 'ct');
  log(
    'opfs' in sqlite3
      ? `OPFS is available, created persisted database at ${db.filename}`
      : `OPFS is not available, created transient database ${db.filename}`,
  );
  // Your SQLite code here.
};

const initializeSQLite = async () => {
  try {
    log('Loading and initializing SQLite3 module...');
    const sqlite3 = await sqlite3InitModule({ print: log, printErr: error });
    log('Done initializing. Running demo...');
    start(sqlite3);
  } catch (err) {
    error('Initialization error:', err.name, err.message);
  }
};

initializeSQLite();

📚 API Reference: The db object implements the Object Oriented API #1.

Main Thread (without OPFS)

import sqlite3InitModule from '@sqliteai/sqlite-wasm';

const log = console.log;
const error = console.error;

const start = (sqlite3) => {
  log('Running SQLite3 version', sqlite3.version.libVersion);
  const db = new sqlite3.oo1.DB('/mydb.sqlite3', 'ct');
  // Your SQLite code here.
};

const initializeSQLite = async () => {
  try {
    log('Loading and initializing SQLite3 module...');
    const sqlite3 = await sqlite3InitModule({
      print: log,
      printErr: error,
    });
    log('Done initializing. Running demo...');
    start(sqlite3);
  } catch (err) {
    error('Initialization error:', err.name, err.message);
  }
};

initializeSQLite();

📚 API Reference: The db object implements the Object Oriented API #1.

Resources

• 📖 SQLite WASM Documentation
• 🔧 Worker1 API Reference
• 🛠️ Object Oriented API #1
• 📦 Package on NPM

License

This project is licensed under the Elastic License 2.0. You can use, copy, modify, and distribute it under the terms of the license for non-production use. For production or managed service use, please contact SQLite Cloud, Inc for a commercial license.