---
name: fp-react
description: Practical patterns for using fp-ts with React - hooks, state, forms, data fetching. Includes version-specific React examples; verify framework/client boundaries.
risk: critical
source: community
date_added: "2026-01-30"
version: 2.0.0
author: fp-ts-skills
tags: [fp-ts, react, typescript, hooks, state-management, forms, data-fetching, remote-data, react-19, next-js]
---

# Functional Programming in React

Practical patterns for React apps. Untested integration sketches; decode external data and verify lifecycle behavior.

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## Detailed Guide

Read [the detailed guide](references/detailed-guide.md) before executing this skill. It retains the complete procedure and reference material. Treat its safety, prerequisites, and validation requirements as mandatory. For focused work, load the relevant sections; for end-to-end work, read the guide completely.

## When to Use What

| Situation | Use |
|-----------|-----|
| Value might not exist | `Option<T>` |
| Operation might fail (sync) | `Either<E, A>` |
| Async operation might fail | `TaskEither<E, A>` |
| Need loading/error/success UI | `RemoteData<E, A>` |
| Form with multiple validations | `Either` with validation applicative |
| Dependency injection | Context + `ReaderTaskEither` |
| Prevent re-renders with fp-ts | `useMemo` or `fp-ts-react-stable-hooks` |

---

## Limitations
- Use this skill only when the task clearly matches the scope described above.
- Do not treat the output as a substitute for environment-specific validation, testing, or expert review.
- Stop and ask for clarification if required inputs, permissions, safety boundaries, or success criteria are missing.


---
Source attribution: whatiskadudoing
Original project: https://github.com/whatiskadudoing/fp-ts-skills
License: CC-BY-4.0
License information: https://creativecommons.org/licenses/by/4.0/
Original upstream instructions; downloaded from Mega AI Hub.


# Mega AI Hub resource metadata

Creator / publisher: whatiskadudoing
Original project: https://github.com/whatiskadudoing/fp-ts-skills
Attribution basis: Actual original-project package file and versioned publisher credits

Fields of work: Development & Engineering
Roles: Frontend Developer
Specialties: Specialty not specified
Tools: Tool not specified
Country applicability: Country not specified
Classification basis: Dave AI task classification from package title, description, and declared metadata
Instruction SHA-256: b52e4344ed282628ede3ca7dc863c53595278376db890741015ff9267bfd3e00
Metadata reviewed: 2026-10-27
This metadata supersedes earlier Mega AI Hub catalog attribution. Original instruction and supporting files are preserved.