---
title: "Effect"
description: "A TypeScript library for composing computations and managing application effects."
pagination: false
---

{/* Generated from content/. Edit the catalog, not this page. */}

<PurposeNote title="Good for">Structuring asynchronous work, errors, dependencies, and resource lifecycles.</PurposeNote>

## What it does

A TypeScript library for composing computations and managing application effects.

## When it fits

Structuring asynchronous work, errors, dependencies, and resource lifecycles.

## Other options in this category

<div data-pagefind-ignore>

- [Total TypeScript TSConfig](/typescript/total-typescript-tsconfig) — Starting projects with consistent compiler settings.
- [True Myth](/typescript/true-myth) — Representing absence and failure explicitly in TypeScript application logic.
- [ts-expect](/typescript/ts-expect) — Checking that public types behave as intended during compilation.
- [ts-pattern](/typescript/ts-pattern) — Expressing structured branching with exhaustive matching over TypeScript values.
- [ts-toolbelt](/typescript/ts-toolbelt) — Building complex type transformations from reusable type-level operations.

</div>

## Source

[Project source for Effect ↗](https://effect.website/)

Editorial overview reviewed on October 24, 2026. Follow the source for current setup, compatibility, and licensing.

[Make application logic type-safe →](/tasks/make-application-logic-type-safe)

[All typescript &amp; typed logic options →](/typescript)