# Is react-dev-utils ESM-only? Can you require() it?

> react-dev-utils@12.0.1 has no importable main entry. No JavaScript entry point.

webpack utilities used by Create React App

Last verified Sep 9, 2026 against react-dev-utils@12.0.1.

react-dev-utils does not expose a JavaScript entry point in package.json. It is likely a CLI, a stylesheet, a type-definition package, or an asset bundle, so require() and import are not the way to use it.

## What to do

1. Do not require() or import react-dev-utils: it has no JavaScript entry point. Use it as a CLI (npx react-dev-utils), a stylesheet, an asset, or a type-definition package as its README describes.
2. TypeScript: npm install -D @types/react-dev-utils

## Facts

- Latest: 12.0.1 (Apr 12, 2022)
- Module format: No JS entry point
- Last CommonJS version: n/a
- TypeScript types: @types/react-dev-utils
- Node engines: >=14
- Weekly downloads: 3.8M
- License: MIT

## Runtime test results for react-dev-utils@12.0.1

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

| Runtime | require("react-dev-utils") | import "react-dev-utils" |
|---|---|---|
| Node.js 18 | fails (MODULE_NOT_FOUND) | fails (ERR_MODULE_NOT_FOUND) |
| Node.js 20 | fails (MODULE_NOT_FOUND) | fails (ERR_MODULE_NOT_FOUND) |
| Node.js 22 | fails (MODULE_NOT_FOUND) | fails (ERR_MODULE_NOT_FOUND) |
| Node.js 24 | fails (MODULE_NOT_FOUND) | fails (ERR_MODULE_NOT_FOUND) |
| Node.js 26 | fails (MODULE_NOT_FOUND) | fails (ERR_MODULE_NOT_FOUND) |
| Bun 1.4.0 | fails (Error) | fails (Error) |

## How to import react-dev-utils

ES modules:

```js
import * as reactDevUtils from "react-dev-utils";
```

## Module format by version

Derived from the type, main and exports fields of every stable release on npm (72 versions; the newest 60 shown).

| Versions | Format | First published |
|---|---|---|
| 1.0.0 – 12.0.1 | No JS entry point | May 19, 2017 |

## Frequently asked

**Is react-dev-utils ESM-only?**

react-dev-utils@12.0.1 has no importable main entry. react-dev-utils does not expose a JavaScript entry point in package.json. It is likely a CLI, a stylesheet, a type-definition package, or an asset bundle, so require() and import are not the way to use it.

**Does react-dev-utils work in Bun?**

Importing react-dev-utils failed in Bun 1.4.0 on Sep 9, 2026: error: Cannot find package 'react-dev-utils' from '/Users/boat/Projects/top-seo/data/probe-work/react-dev-utils/imp.mjs'

**Does react-dev-utils ship TypeScript types?**

Not bundled. Install the community types with "npm install -D @types/react-dev-utils".

## Links

- [react-dev-utils on npm](https://www.npmjs.com/package/react-dev-utils)
- [Source repository](https://github.com/facebook/create-react-app)
- [HTML version](https://canirequire.com/package/react-dev-utils/)
- [JSON version](https://canirequire.com/package/react-dev-utils.json)

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