# Is cli-width ESM-only? Can you require() it?

> cli-width@4.1.0 is a CommonJS package. CommonJS — require() works on every Node.js version we test.

Get stdout window width, with two fallbacks, tty and then a default.

Last verified Sep 9, 2026 against cli-width@4.1.0.

cli-width ships CommonJS only. require("cli-width") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >= 12. import "cli-width" 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("cli-width") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >= 12.
2. From ES modules use the default import: import cliWidth from "cli-width"; then destructure. Named imports only work when Node.js can statically detect the exports.
3. TypeScript: types are bundled; install nothing extra.

## Facts

- Latest: 4.1.0 (Aug 5, 2023)
- Module format: CommonJS
- Last CommonJS version: 4.1.0
- TypeScript types: bundled
- Node engines: >= 12
- Weekly downloads: 66.7M
- License: ISC

## Runtime test results for cli-width@4.1.0

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

| Runtime | require("cli-width") | import "cli-width" |
|---|---|---|
| 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 cli-width

ES modules:

```js
import cliWidth from "cli-width";
```

CommonJS:

```js
const cliWidth = require("cli-width");
```

## Module format by version

Derived from the type, main and exports fields of every stable release on npm (12 versions; the newest 12 shown).

| Versions | Format | First published |
|---|---|---|
| 1.0.0 – 4.1.0 | CommonJS | Jan 21, 2015 |

## Frequently asked

**Is cli-width ESM-only?**

cli-width@4.1.0 is a CommonJS package. cli-width ships CommonJS only. require("cli-width") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >= 12. import "cli-width" 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 cli-width with ES module syntax?**

Yes. import cliWidth from "cli-width" 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 cli-width work in Bun?**

Yes. import "cli-width" loaded successfully in Bun 1.4.0 on Sep 9, 2026.

**Does cli-width ship TypeScript types?**

Yes. cli-width bundles its own type declarations; no @types package is needed.

## Links

- [cli-width on npm](https://www.npmjs.com/package/cli-width)
- [Source repository](https://github.com/knownasilya/cli-width)
- [HTML version](https://canirequire.com/package/cli-width/)
- [JSON version](https://canirequire.com/package/cli-width.json)

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