# Is is-extglob ESM-only? Can you require() it?

> is-extglob@2.1.1 is a CommonJS package. CommonJS — require() works on every Node.js version we test.

Returns true if a string has an extglob.

Last verified Sep 9, 2026 against is-extglob@2.1.1.

is-extglob ships CommonJS only. require("is-extglob") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=0.10.0. import "is-extglob" 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.

## What to do

1. require("is-extglob") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=0.10.0.
2. From ES modules use the default import: import isExtglob from "is-extglob"; then destructure. Named imports only work when Node.js can statically detect the exports.
3. TypeScript: npm install -D @types/is-extglob

## Facts

- Latest: 2.1.1 (Dec 11, 2016)
- Module format: CommonJS
- Last CommonJS version: 2.1.1
- TypeScript types: @types/is-extglob
- Node engines: >=0.10.0
- Weekly downloads: 159.3M
- License: MIT

## Runtime test results for is-extglob@2.1.1

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

| Runtime | require("is-extglob") | import "is-extglob" |
|---|---|---|
| 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 is-extglob

ES modules:

```js
import isExtglob from "is-extglob";
```

CommonJS:

```js
const isExtglob = require("is-extglob");
```

## Module format by version

Derived from the type, main and exports fields of every stable release on npm (4 versions; the newest 4 shown).

| Versions | Format | First published |
|---|---|---|
| 1.0.0 – 2.1.1 | CommonJS | Mar 6, 2015 |

## Frequently asked

**Is is-extglob ESM-only?**

is-extglob@2.1.1 is a CommonJS package. is-extglob ships CommonJS only. require("is-extglob") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=0.10.0. import "is-extglob" 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 is-extglob with ES module syntax?**

Yes. import isExtglob from "is-extglob" 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 is-extglob work in Bun?**

Yes. import "is-extglob" loaded successfully in Bun 1.4.0 on Sep 9, 2026.

**Does is-extglob ship TypeScript types?**

Not bundled. Install the community types with "npm install -D @types/is-extglob".

## Links

- [is-extglob on npm](https://www.npmjs.com/package/is-extglob)
- [Source repository](https://github.com/jonschlinkert/is-extglob)
- [HTML version](https://canirequire.com/package/is-extglob/)
- [JSON version](https://canirequire.com/package/is-extglob.json)

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