All kinds of utility functions

Usage no npm install needed!

<script type="module">
  import compasStdlib from 'https://cdn.skypack.dev/@compas/stdlib';



install size stdlib lint-build-test codecov

Unified backend tooling


  • Minimal project boilerplate
  • Script runner, can watch & reload almost anything
  • Test and benchmark runner
  • Flexible code generators supporting routers, validators, api clients, CRUD queries and more in the future.
  • Opinionated structured logging
  • Common Koa middleware wrapped in a single function
  • Various utilities like loading .env files, executing other processes and a basic string templating system


  • Node.js >= 16
  • Yarn 1.x.x


My work involved doing many small projects. I had a hard time back porting incremental fixes to existing projects. To facilitate my needs more and to stop copying and pasting things around, this project was born.

Features breakdown


  • Run user scripts (in watch mode)
  • Run the linter
  • A Compas based boilerplate
  • Test runner
  • Benchmark runner
  • Necessary Docker container management
  • Visualise the known database structure of @compas/code-gen


  • All necessary ESLint and Prettier dependencies
  • Default configuration for ESLint and Prettier


  • Various lodash inspired utilities (isNil, isPlainObject, ...)
  • Wrappers for child_process execution and spawning
  • A mainFn wrapper that reads .env and calls the provided function if the file is the process entrypoint
  • Replacements for CommonJS __dirname and __filename
  • A structured logger
    • Writing newline delimited JSON in production
    • Pretty printing for development
  • Various utilities to get insight in the running process
  • A manual event system


  • Wrapper around Koa instance creation
  • 404 en error handling
  • Handle CORS
  • Send file helper
  • Session support with safe, browser readable cookies


  • Wrapper around the Minio S3 client
  • Wrapper around Postgres connection
  • Utilities for providing temporary databases in a test environment
  • Postgres migrations
  • Postgres and S3 combined for file storage
  • Caching files from S3 in memory or on local disk
  • Postgres powered queue implementation
    • Supports priority, scheduling, multiple async workers and recurring jobs
  • koa-session compatible SessionStore backed by Postgres


  • Code generators for the following:
    • router, with wildcard and path parameter support
    • validators, pure JavaScript implementation
    • sql, CRUD Postgres queries and nested result support
    • Axios based api client
    • TypeScript or JSDoc types
    • react-query hooks
  • An extendable set of types:
    • boolean, number, string;
    • object, array, any;
    • date, uuid;
    • generic, anyOf, reference;
  • Remote structure loader
  • OpenAPI to Compas structure converter

Docs and development

See the website for the changelog, all available APIs and various guides.

For contributing see contributing.md.

New features

New features added should fall under the following categories:

  • It improves the interface between api and client in some way. An example may be to support websockets in @compas/code-gen
  • It improves the developer experience one way or another while developing an api For example the compas docker commands or various utilities provided by @compas/stdlib

Although some parts heavily rely on conventions set by the packages, we currently aim not to be a framework. We aim to provide a good developer experience, useful abstractions around the basics, and a stable backend <-> client interface.