Handle promises with ease.

React component and hook for declarative promise resolution and data fetching. Makes it easy to handle every
state of the asynchronous process, without assumptions about the shape of your data or the type of request.
Use it with fetch, Axios or other data fetching libraries, even GraphQL.

- Zero dependencies
- Works with promises, async/await and the Fetch API
- Now with experimental Suspense support
- Choose between Render Props, Context-based helper components or the useAsync and useFetch hooks
- Debug and develop every part of the loading sequence with the React Async DevTools
- Provides convenient isPending, startedAt, finishedAt, et al metadata
- Provides cancel and reload actions
- Automatic re-run using watch or watchFn prop
- Accepts onResolve, onReject and onCancel callbacks
- Supports [abortable fetch] by providing an AbortController
- Supports optimistic updates using setData
- Supports server-side rendering through initialValue
- Written in TypeScript, ships with type definitions
- Works well in React Native too!

[abortable fetch]: https://developers.google.com/web/updates/2017/09/abortable-fetch

> ## Upgrading to v9
>
> Version 9 comes with a minor breaking change.
> See Upgrading for details.

Documentation

- Introduction

Getting started

- Installation
- Upgrading
- Usage
- DevTools

API

- Interfaces
- Configuration options
- State properties
- Helper components

Guide

- Async components
- Separating view and logic
- Async actions
- Optimistic updates
- Server-side rendering

Contributing

- Introduction
- Setting up
- Development
- Testing
- Releasing

Contributors

Thanks goes to these wonderful people (emoji key):

Gert Hengeveld 💻 👀 💬	Khartir 💻 📦	Lenz Weber 💻 📦 🤔	Avinash 👀 📖	Fred K. Schott 🔧	Cedric van Putten 💻	Tom Shane 👀
Philip Peterson 💻	Sibelius Seraphini 👀	Jim Cummins 👀	Mihkel Sokk 👀	Jiří Brabec 💻	Andrii U 💡	Matthisk Heimensen 💻
Danny Hurlburt 🤔 📖	Noel Yoo ⚠️ 💻 🤔	Adam Ratcliffe 💻	Kent C. Dodds 💻	walter-ind 📖	Jacob Lee 💻	Youngrok Kim 💻
Munir Ahmed Elsangedy 🤔	AlixWang 📖	Sal Olivares 💻 🐛	Neale Upstone 💻	Martin Barksten 📖

This project follows the all-contributors specification. Contributions of any kind welcome!

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