# Is to-regex-range ESM-only? Can you require() it?

> to-regex-range@5.0.1 is a CommonJS package. CommonJS — require() works on every Node.js version we test.

Pass two numbers, get a regex-compatible source string for matching ranges. Validated against more than 2.78 million test assertions.

Last verified Sep 9, 2026 against to-regex-range@5.0.1.

to-regex-range ships CommonJS only. require("to-regex-range") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=8.0. import "to-regex-range" 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("to-regex-range") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=8.0.
2. From ES modules use the default import: import toRegexRange from "to-regex-range"; then destructure. Named imports only work when Node.js can statically detect the exports.
3. TypeScript: npm install -D @types/to-regex-range

## Facts

- Latest: 5.0.1 (Apr 7, 2019)
- Module format: CommonJS
- Last CommonJS version: 5.0.1
- TypeScript types: @types/to-regex-range
- Node engines: >=8.0
- Weekly downloads: 142.8M
- License: MIT

## Runtime test results for to-regex-range@5.0.1

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

| Runtime | require("to-regex-range") | import "to-regex-range" |
|---|---|---|
| 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 to-regex-range

ES modules:

```js
import toRegexRange from "to-regex-range";
```

CommonJS:

```js
const toRegexRange = require("to-regex-range");
```

## Module format by version

Derived from the type, main and exports fields of every stable release on npm (18 versions; the newest 18 shown).

| Versions | Format | First published |
|---|---|---|
| 0.1.0 – 5.0.1 | CommonJS | Aug 7, 2015 |

## Frequently asked

**Is to-regex-range ESM-only?**

to-regex-range@5.0.1 is a CommonJS package. to-regex-range ships CommonJS only. require("to-regex-range") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=8.0. import "to-regex-range" 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 to-regex-range with ES module syntax?**

Yes. import toRegexRange from "to-regex-range" 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 to-regex-range work in Bun?**

Yes. import "to-regex-range" loaded successfully in Bun 1.4.0 on Sep 9, 2026.

**Does to-regex-range ship TypeScript types?**

Not bundled. Install the community types with "npm install -D @types/to-regex-range".

## Links

- [to-regex-range on npm](https://www.npmjs.com/package/to-regex-range)
- [Source repository](https://github.com/micromatch/to-regex-range)
- [HTML version](https://canirequire.com/package/to-regex-range/)
- [JSON version](https://canirequire.com/package/to-regex-range.json)

---

For scripts and AI agents: any package is at https://canirequire.com/package/<name>/index.md (Markdown) or https://canirequire.com/package/<name>.json (JSON); the site index is https://canirequire.com/llms.txt. Fetch the URL directly; no search needed.