# Is redux-thunk ESM-only? Can you require() it?

> redux-thunk@3.1.0 ships CommonJS and ESM builds. Dual package — require() works on every Node.js version we test; import works too.

Thunk middleware for Redux.

Last verified Sep 9, 2026 against redux-thunk@3.1.0.

redux-thunk publishes both a CommonJS entry and a native ESM entry (ESM added in 3.0.0). require("redux-thunk") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. import "redux-thunk" works alongside it.

## What to do

1. Nothing to change. require("redux-thunk") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. import * as reduxThunk from "redux-thunk" works alongside it; use named imports for what the ESM entry exports.
2. TypeScript: types are bundled; install nothing extra.

## Facts

- Latest: 3.1.0 (Dec 4, 2023)
- Module format: Dual (CommonJS + ESM)
- Last CommonJS version: 3.1.0
- Native ESM since: 3.0.0
- TypeScript types: bundled
- Node engines: not declared
- Weekly downloads: 22.0M
- License: MIT

## Runtime test results for redux-thunk@3.1.0

Installed and executed on Sep 9, 2026 with require("redux-thunk") from a CommonJS file and import "redux-thunk" from an ES module.

| Runtime | require("redux-thunk") | import "redux-thunk" |
|---|---|---|
| Node.js 18 | works | works |
| Node.js 20 | works | works |
| Node.js 22 | works | works |
| Node.js 24 | works | works |
| Node.js 26 | works | works |
| Bun 1.4.0 | works | works |

## How to import redux-thunk

ES modules:

```js
import * as reduxThunk from "redux-thunk";
```

Namespace import shown because the ESM entry may have no default export; use named imports for what it exports.

CommonJS:

```js
const reduxThunk = require("redux-thunk");
```

## Module format by version

Derived from the type, main and exports fields of every stable release on npm (17 versions; the newest 17 shown).

| Versions | Format | First published |
|---|---|---|
| 3.0.0 – 3.1.0 | Dual (CommonJS + ESM) | Dec 4, 2023 |
| 0.1.0 – 2.4.2 | CommonJS | Jul 13, 2015 |

## Frequently asked

**Is redux-thunk ESM-only?**

redux-thunk@3.1.0 ships CommonJS and ESM builds. redux-thunk publishes both a CommonJS entry and a native ESM entry (ESM added in 3.0.0). require("redux-thunk") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. import "redux-thunk" works alongside it.

**Can I require redux-thunk?**

Yes. redux-thunk ships a CommonJS entry alongside the native ESM entry. require("redux-thunk") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun.

**Does redux-thunk work in Bun?**

Yes. import "redux-thunk" loaded successfully in Bun 1.4.0 on Sep 9, 2026.

**Does redux-thunk ship TypeScript types?**

Yes. redux-thunk bundles its own type declarations; no @types package is needed.

## Links

- [redux-thunk on npm](https://www.npmjs.com/package/redux-thunk)
- [Source repository](https://github.com/reduxjs/redux-thunk)
- [HTML version](https://canirequire.com/package/redux-thunk/)
- [JSON version](https://canirequire.com/package/redux-thunk.json)

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