davidtimms / effective.ts

Write safe, concurrent, fault-tolerant programs in TypeScript.

effective.ts

A library for writing safe, concurrent, fault-tolerant programs in TypeScript.

Key Features

• Functional design
  Effective.ts introduces an IO monad, as used in Haskell and Cats Effect (Scala). This allows the manipulation of programs as values, using pure functions. This has a "fluent" method chaining interface, to make it idiomatic to TypeScript.

• Typed errors
  The IO type tracks the possible errors which can be raised by an action, so you know exactly which error cases you need to handle. No nasty surprises!

• Concurrency and cancellation
  Launch lightweight async fibers (green threads), with support for early cancellation. Easily run actions in parallel or in sequence.

• Fault-tolerance
  In the real world, things fail, so effective.ts has built-in support for timeouts and retries with exponential backoff.

API Reference

API reference documentation is hosted here.

Cheat Sheet

If you are already familiar with using the IO types in Haskell or Scala, this cheat sheet should help you get up to speed with Effective.ts quickly.