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

> regjsparser@0.13.2 is a CommonJS package. CommonJS — require() works on every Node.js version we test.

Parsing the JavaScript's RegExp in JavaScript.

Last verified Sep 9, 2026 against regjsparser@0.13.2.

regjsparser ships CommonJS only. require("regjsparser") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. import "regjsparser" 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("regjsparser") 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 regjsparser from "regjsparser"; then destructure. Named imports only work when Node.js can statically detect the exports.
3. TypeScript: types are bundled; install nothing extra.

## Facts

- Latest: 0.13.2 (Jun 13, 2026)
- Module format: CommonJS
- Last CommonJS version: 0.13.2
- TypeScript types: bundled
- Node engines: not declared
- Weekly downloads: 37.6M
- License: BSD-2-Clause

## Runtime test results for regjsparser@0.13.2

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

| Runtime | require("regjsparser") | import "regjsparser" |
|---|---|---|
| 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 regjsparser

ES modules:

```js
import regjsparser from "regjsparser";
```

CommonJS:

```js
const regjsparser = require("regjsparser");
```

## Module format by version

Derived from the type, main and exports fields of every stable release on npm (40 versions; the newest 40 shown).

| Versions | Format | First published |
|---|---|---|
| 0.0.1 – 0.13.2 | CommonJS | Nov 3, 2013 |

## Frequently asked

**Is regjsparser ESM-only?**

regjsparser@0.13.2 is a CommonJS package. regjsparser ships CommonJS only. require("regjsparser") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. import "regjsparser" 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 regjsparser with ES module syntax?**

Yes. import regjsparser from "regjsparser" 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 regjsparser work in Bun?**

Yes. import "regjsparser" loaded successfully in Bun 1.4.0 on Sep 9, 2026.

**Does regjsparser ship TypeScript types?**

Yes. regjsparser bundles its own type declarations; no @types package is needed.

## Links

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

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