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

> media-typer@2.0.0 is ESM-only. ESM-only since 2.0.0 — last CommonJS version is 1.1.1.

Simple RFC 6838 media type parser and formatter

Last verified Sep 9, 2026 against media-typer@2.0.0.

media-typer dropped its CommonJS build in 2.0.0 (May 2026). The last version with a plain require()-able CommonJS entry is 1.1.1, published Jul 23, 2026; it declares support for Node.js >= 0.8.

On Node.js 20.19+, 22.12+ and newer, require("media-typer") works with the latest version: Node.js loads synchronous ES modules through require(). Verified on Node.js 20, 22, 24 and 26. On Node.js 18, which has no require(esm), require("media-typer") fails with ERR_REQUIRE_ESM.

## What to do

1. On Node.js 20.19+, 22.12+ and newer, require("media-typer") works with the latest version: Node.js loads synchronous ES modules through require(). Verified on Node.js 20, 22, 24 and 26.
2. From a CommonJS file, use a dynamic import inside an async function: const mediaTyper = await import("media-typer"). That works on every Node.js version the package supports (>=18).
3. If you need a synchronous require() or run Node.js 18: npm install media-typer@1.1.1, the last CommonJS release (published Jul 23, 2026); it declares Node.js >= 0.8.
4. TypeScript: npm install -D @types/media-typer

## Facts

- Latest: 2.0.0 (May 27, 2026)
- Module format: ESM-only
- Last CommonJS version: 1.1.1
- ESM-only since: 2.0.0 (May 27, 2026)
- TypeScript types: @types/media-typer
- Node engines: >=18
- Weekly downloads: 77.7M
- License: MIT

## Runtime test results for media-typer@2.0.0

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

| Runtime | require("media-typer") | import "media-typer" |
|---|---|---|
| Node.js 18 | fails (ERR_REQUIRE_ESM) | 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 media-typer

ES modules:

```js
import * as mediaTyper from "media-typer";
```

Namespace import shown because the ESM entry may have no default export; use named imports for what it exports.

CommonJS:

```js
// Node.js 20.19+, 22.12+ and newer (verified):
const mediaTyper = require("media-typer");

// Any Node.js version the package supports (>=18), from an async function:
async function main() {
  const mediaTyper = await import("media-typer");
}

// Or pin the last CommonJS release (declares Node.js >= 0.8):
// npm install media-typer@1.1.1
```

## Module format by version

Derived from the type, main and exports fields of every stable release on npm (10 versions; the newest 10 shown).

| Versions | Format | First published |
|---|---|---|
| 2.0.0 | ESM-only | May 27, 2026 |
| 0.0.0 – 1.1.1 | CommonJS | Jun 13, 2014 |

## Frequently asked

**Is media-typer ESM-only?**

media-typer@2.0.0 is ESM-only. media-typer dropped its CommonJS build in 2.0.0 (May 2026). The last version with a plain require()-able CommonJS entry is 1.1.1, published Jul 23, 2026; it declares support for Node.js >= 0.8.

**Which version of media-typer still supports CommonJS / require()?**

1.1.1 is the last version of media-typer with a CommonJS build; it declares Node.js >= 0.8. Install it with "npm install media-typer@1.1.1". Every version from 2.0.0 on is ESM-only.

**How do I use media-typer from a CommonJS file?**

From a CommonJS file, use a dynamic import inside an async function: const mediaTyper = await import("media-typer"). That works on every Node.js version the package supports (>=18). On Node.js 20.19+, 22.12+ and newer, require("media-typer") works with the latest version: Node.js loads synchronous ES modules through require(). Verified on Node.js 20, 22, 24 and 26. Alternatively pin media-typer@1.1.1 (declares Node.js >= 0.8).

**Does media-typer work in Bun?**

Yes. import "media-typer" loaded successfully in Bun 1.4.0 on Sep 9, 2026.

**Does media-typer ship TypeScript types?**

Not bundled. Install the community types with "npm install -D @types/media-typer".

## Links

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

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