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

> acorn-jsx@5.3.2 is a CommonJS package. CommonJS — require() works on every Node.js version we test.

Modern, fast React.js JSX parser

Last verified Sep 9, 2026 against acorn-jsx@5.3.2.

acorn-jsx ships CommonJS only. require("acorn-jsx") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. import "acorn-jsx" 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("acorn-jsx") 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 acornJsx from "acorn-jsx"; then destructure. Named imports only work when Node.js can statically detect the exports.
3. TypeScript: no types are available for acorn-jsx; declare the module yourself if you need them.

## Facts

- Latest: 5.3.2 (Jul 9, 2021)
- Module format: CommonJS
- Last CommonJS version: 5.3.2
- TypeScript types: none
- Node engines: not declared
- Weekly downloads: 125.5M
- License: MIT

## Runtime test results for acorn-jsx@5.3.2

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

| Runtime | require("acorn-jsx") | import "acorn-jsx" |
|---|---|---|
| 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 acorn-jsx

ES modules:

```js
import acornJsx from "acorn-jsx";
```

CommonJS:

```js
const acornJsx = require("acorn-jsx");
```

## Module format by version

Derived from the type, main and exports fields of every stable release on npm (21 versions; the newest 21 shown).

| Versions | Format | First published |
|---|---|---|
| 0.6.1 – 5.3.2 | CommonJS | Jul 11, 2014 |

## Frequently asked

**Is acorn-jsx ESM-only?**

acorn-jsx@5.3.2 is a CommonJS package. acorn-jsx ships CommonJS only. require("acorn-jsx") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. import "acorn-jsx" 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 acorn-jsx with ES module syntax?**

Yes. import acornJsx from "acorn-jsx" 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 acorn-jsx work in Bun?**

Yes. import "acorn-jsx" loaded successfully in Bun 1.4.0 on Sep 9, 2026.

**Does acorn-jsx ship TypeScript types?**

No. acorn-jsx ships no type declarations and there is no @types package for it.

## Links

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

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