FP-TS Error Handling
Implements type-safe functional error handling patterns using fp-ts Either and TaskEither for predictable TypeScript applications.
This skill provides comprehensive patterns for treating errors as data in TypeScript, moving away from traditional try/catch exceptions that break type contracts. It guides developers through using fp-ts primitives like Either for synchronous results and TaskEither for asynchronous operations, enabling explicit error typing and clean composition. By utilizing these patterns, you can build more resilient APIs and services that enforce error handling at compile-time rather than runtime, leading to significantly fewer unhandled exceptions in production.
Key Features
01Type-safe error handling using Either and TaskEither primitives
02Safe conversion of standard throwing functions and nullable values
03Advanced error type unification using chainW for multi-failure scenarios
04Do-notation patterns for readable composition of complex business logic
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06Error accumulation patterns for complex form validation using sequenceS
Use Cases
01Replacing nested try/catch blocks in API service layers with clean pipelines
02Building resilient async data pipelines where every failure point is explicitly typed
03Implementing robust multi-field form validation that collects all errors simultaneously