# Is @storybook/manager-webpack5 ESM-only? Can you require() it?

> @storybook/manager-webpack5@6.5.16 is a CommonJS package. CommonJS — require() works on every Node.js version we test.

Storybook framework-agnostic API

Last verified Sep 9, 2026 against @storybook/manager-webpack5@6.5.16.

@storybook/manager-webpack5 ships CommonJS only. require("@storybook/manager-webpack5") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. import "@storybook/manager-webpack5" also works because Node.js and Bun can import CommonJS from ES modules, but only the default export is guaranteed; named imports depend on Node's static analysis of the module.

It also declares a "module" field, so bundlers such as webpack, Vite and esbuild pick up an ESM build for tree-shaking.

## What to do

1. require("@storybook/manager-webpack5") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun.
2. From ES modules use the default import: import managerWebpack5 from "@storybook/manager-webpack5"; then destructure. Named imports only work when Node.js can statically detect the exports.
3. TypeScript: types are bundled; install nothing extra.

## Facts

- Latest: 6.5.16 (Jan 26, 2023)
- Module format: CommonJS
- Last CommonJS version: 6.5.16
- TypeScript types: bundled
- Node engines: not declared
- Weekly downloads: 225K
- License: MIT

## Runtime test results for @storybook/manager-webpack5@6.5.16

Installed and executed on Sep 9, 2026 with require("@storybook/manager-webpack5") from a CommonJS file and import "@storybook/manager-webpack5" from an ES module.

| Runtime | require("@storybook/manager-webpack5") | import "@storybook/manager-webpack5" |
|---|---|---|
| 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 @storybook/manager-webpack5

ES modules:

```js
import managerWebpack5 from "@storybook/manager-webpack5";
```

CommonJS:

```js
const managerWebpack5 = require("@storybook/manager-webpack5");
```

## Module format by version

Derived from the type, main and exports fields of every stable release on npm (51 versions; the newest 51 shown).

| Versions | Format | First published |
|---|---|---|
| 6.3.0 – 6.5.16 | CommonJS | Jun 23, 2021 |

## Frequently asked

**Is @storybook/manager-webpack5 ESM-only?**

@storybook/manager-webpack5@6.5.16 is a CommonJS package. @storybook/manager-webpack5 ships CommonJS only. require("@storybook/manager-webpack5") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. import "@storybook/manager-webpack5" also works because Node.js and Bun can import CommonJS from ES modules, but only the default export is guaranteed; named imports depend on Node's static analysis of the module.

**Can I import @storybook/manager-webpack5 with ES module syntax?**

Yes. import managerWebpack5 from "@storybook/manager-webpack5" works in Node.js and Bun because they support importing CommonJS modules. Named imports work only when Node.js can statically detect the exports.

**Does @storybook/manager-webpack5 work in Bun?**

Yes. import "@storybook/manager-webpack5" loaded successfully in Bun 1.4.0 on Sep 9, 2026.

**Does @storybook/manager-webpack5 ship TypeScript types?**

Yes. @storybook/manager-webpack5 bundles its own type declarations; no @types package is needed.

## Links

- [@storybook/manager-webpack5 on npm](https://www.npmjs.com/package/@storybook/manager-webpack5)
- [Source repository](https://github.com/storybookjs/storybook)
- [HTML version](https://canirequire.com/package/@storybook/manager-webpack5/)
- [JSON version](https://canirequire.com/package/@storybook/manager-webpack5.json)

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