TypeScript SQLite layer with support for both native C++ & pure JavaScript drivers.

Usage no npm install needed!

<script type="module">
  import trilogy from '';


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trilogy is a simple Promise-based wrapper for SQLite databases. It supports both the native C++ sqlite3 driver and the pure JavaScript sql.js backend — compile natively for speed when you need it, or use sql.js headache-free in cross-platform environments and Electron apps.

It's not an ORM and isn't intended to be one — it doesn't have any relationship features. Instead it focuses on providing a simple, clear API that's influenced more by Mongoose than by SQL.

features · installation · usage · contributing · license


  • :link: automatically casts data between JavaScript & SQLite types

    Define schemas with types like String, Date, or 'increments' — trilogy will handle all the type-casting involved to map accurately between JavaScript and the underlying SQLite database.

  • :battery: powered by the knex query builder

    trilogy uses knex internally to build its queries, but it's also exposed so you can use it to build your own. No need to mess with ridiculous multi-line strings.

  • :nut_and_bolt: supports multiple swappable backends ( plus in-memory storage )

    Both the native sqlite3 module and sql.js (pure JavaScript!) are supported. There is also memory-only storage for fast, unpersisted data handling, which is great for tests and performance critical situations.

    You can even swap the backend after you've started, with no changes to the rest of your code!

  • :cop: written in TypeScript

    trilogy is written in and provides a first-class experience for TypeScript.

  • :electric_plug: lifecycle hooks

    Any number of hooks (aka subscribers or listeners) can be attached at several points in the lifecycle — for example onQuery, beforeCreate, afterUpdate. These are useful for debugging and extensibility.

  • :revolving_hearts: perfect for Electron & NW.js

    Compiling the sqlite3 module for all the platforms you target with Electron or NW.js can be difficult. That's why trilogy also supports the sql.js backend, which doesn't need to be compiled at all!


  1. Install trilogy

    # using yarn
    yarn add trilogy
    # using npm
    npm i trilogy
  2. Install a backend

    # using yarn
    yarn add sqlite3
    # using npm
    npm i sqlite3


    # using yarn
    yarn add sql.js
    # using npm
    npm i sql.js


Full documentation is available here and includes guides, an API reference, and more.

Here's a quick overview. It uses async & await but is easily usable with vanilla Promises.

import { connect } from 'trilogy'

// defaults to using the `sqlite3` backend
const db = connect('./file.db')

// choose `sql.js` to avoid native compilation :)
const db = connect('./file.db', {
  client: 'sql.js'

// set the filename to ':memory:' for fast, in-memory storage
const db = connect(':memory:', {
  // it works for both clients above!
  client: 'sql.js'

;(async function () {
  const games = await db.model('games', {
    name: { type: String },
    genre: String,            // type shorthand
    released: Date,
    awards: Array,
    id: 'increments'          // special type, primary key

  await games.create({
    name: 'Overwatch',
    genre: 'FPS',
    released: new Date('May 23, 2016'),
    awards: [
      'Game of the Year',
      'Best Multiplayer Game',
      'Best ESports Game'

  const overwatch = await games.findOne({ name: 'Overwatch' })

  // -> 'Best Multiplayer Game'


This project is open to contributions of all kinds! Don't worry if you're not 100% up to speed on the process — there's a short outline in the Contributor Guide.

You'll also find a reference for the set of labels used to categorize issues, with descriptions of each. (Contributor Guide - issue labels)

Also, please read and follow the project's Code of Conduct.


MIT © Bo Lingen / citycide

See license