Advanced

Effect-TS completely reimagines error handling. Learn the difference between Expected Failures and Unexpected Defects, and how to use catchTag to build resilient, self-documenting pipelines.

To use Effect-TS, you must know how to bridge the gap between the chaotic outside world and your pure functional pipeline. Master the constructors and execution methods of the Effect runtime.

The heart of Effect-TS is its three-parameter type signature. Master the A (Success), E (Error), and R (Requirement) parameters to unlock perfect architectural safety.

We have built the functional foundation. Now it is time to enter the ecosystem. Discover why Effect-TS is rapidly becoming the standard library for enterprise TypeScript, and run your first pure asynchronous program.

Learn how to avoid the ‘Pyramid of Doom’ and method chaining limitations by embracing functional composition. We explore how pipe and flow allow you to build complex logic from small, testable pure functions.

Learn how to wrap missing data and expected errors in type-safe containers. We explore the Option and Either monads, providing the final foundational step before entering the Effect-TS ecosystem.

Learn how to eliminate impossible states from your application by mastering Algebraic Data Types (ADTs). We explore Sum Types, Product Types, and exhaustive pattern matching in TypeScript.

Functional programming requires data to be immutable. Discover how to leverage TypeScript’s structural typing, Readonly<T>, and as const to enforce deep immutability at compile time, eliminating a massive category of state-based bugs.

Welcome to the final module! Before diving into Effect-TS, we must build a foundation in Functional Programming. Learn why pure functions eliminate whole classes of bugs, how separating descriptions from execution powers the Effect runtime, and how to refactor impure services into highly testable functional pipelines.

The functional programming masterclass for TypeScript developers. Bridge object-oriented patterns into pure functional architecture with Option/Either types, typed error handling without throw exceptions, pipe/flow composition, and an introduction to the Effect-TS ecosystem.