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

> ember-source@7.2.0 is ESM-only. ESM-only since 7.2.0 — last CommonJS version is 7.1.0.

A JavaScript framework for creating ambitious web applications

Last verified Sep 9, 2026 against ember-source@7.2.0.

ember-source dropped its CommonJS build in 7.2.0 (August 2026). The last version with a plain require()-able CommonJS entry is 7.1.0, published Jun 22, 2026; it declares support for Node.js >= 20.19.

ember-source exposes only subpaths in its exports map, for example "ember-source/types"; there is no root entry, so import "ember-source" itself throws ERR_PACKAGE_PATH_NOT_EXPORTED. Import the subpath you need instead.

require("ember-source") failed in our probe on Node.js 20+ as well; see the runtime table for the error before relying on it. Node.js 18 has no require(esm), and ember-source@7.2.0 declares Node.js >= 20.19, so 18 is outside its supported range anyway.

ember-source@7.2.0 declares engines ">= 20.19", so Node.js 18 is outside its supported range regardless of module format.

## What to do

1. Import subpaths, never the bare name: import from "ember-source/types". import "ember-source" throws ERR_PACKAGE_PATH_NOT_EXPORTED.
2. require("ember-source") failed in our probe on Node.js 20+ as well; see the runtime table for the error before relying on it.
3. From a CommonJS file, use a dynamic import inside an async function: const emberSource = await import("ember-source/types"). That works on every Node.js version the package supports (>= 20.19).
4. If you need a synchronous require(): npm install ember-source@7.1.0, the last CommonJS release (published Jun 22, 2026); it declares Node.js >= 20.19.
5. ember-source@7.2.0 declares engines ">= 20.19", so Node.js 18 is unsupported regardless: upgrade Node.js or pin an older release.
6. TypeScript: types are bundled; install nothing extra.

## Facts

- Latest: 7.2.0 (Aug 9, 2026)
- Module format: ESM-only
- Last CommonJS version: 7.1.0
- ESM-only since: 7.2.0 (Aug 9, 2026)
- TypeScript types: bundled
- Node engines: >= 20.19
- Weekly downloads: 293K
- License: MIT

## Runtime test results for ember-source@7.2.0

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

| Runtime | require("ember-source") | import "ember-source" |
|---|---|---|
| Node.js 18 | fails (ERR_PACKAGE_PATH_NOT_EXPORTED) | fails (ERR_PACKAGE_PATH_NOT_EXPORTED) |
| Node.js 20 | fails (ERR_PACKAGE_PATH_NOT_EXPORTED) | fails (ERR_PACKAGE_PATH_NOT_EXPORTED) |
| Node.js 22 | fails (ERR_PACKAGE_PATH_NOT_EXPORTED) | fails (ERR_PACKAGE_PATH_NOT_EXPORTED) |
| Node.js 24 | fails (ERR_PACKAGE_PATH_NOT_EXPORTED) | fails (ERR_PACKAGE_PATH_NOT_EXPORTED) |
| Node.js 26 | fails (ERR_PACKAGE_PATH_NOT_EXPORTED) | fails (ERR_PACKAGE_PATH_NOT_EXPORTED) |
| Bun 1.4.0 | fails (Error) | fails (Error) |

## How to import ember-source

ES modules:

```js
import * as emberSource from "ember-source/types";
```

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

CommonJS:

```js
// require("ember-source/types") failed in our probe on Node.js 20.19+, 22.12+ and newer as well; see the runtime table.

// Any Node.js version the package supports (>= 20.19), from an async function:
async function main() {
  const emberSource = await import("ember-source/types");
}

// Or pin the last CommonJS release (declares Node.js >= 20.19):
// npm install ember-source@7.1.0
```

## Module format by version

Derived from the type, main and exports fields of every stable release on npm (231 versions; the newest 60 shown).

| Versions | Format | First published |
|---|---|---|
| 7.2.0 | ESM-only | Aug 9, 2026 |
| 4.8.0 – 7.1.0 | CommonJS | Oct 17, 2022 |

## Frequently asked

**Is ember-source ESM-only?**

ember-source@7.2.0 is ESM-only. ember-source dropped its CommonJS build in 7.2.0 (August 2026). The last version with a plain require()-able CommonJS entry is 7.1.0, published Jun 22, 2026; it declares support for Node.js >= 20.19.

**Which version of ember-source still supports CommonJS / require()?**

7.1.0 is the last version of ember-source with a CommonJS build; it declares Node.js >= 20.19. Install it with "npm install ember-source@7.1.0". Every version from 7.2.0 on is ESM-only.

**How do I use ember-source from a CommonJS file?**

From a CommonJS file, use a dynamic import inside an async function: const emberSource = await import("ember-source/types"). That works on every Node.js version the package supports (>= 20.19). require("ember-source") failed in our probe on Node.js 20+ as well; see the runtime table for the error before relying on it. Alternatively pin ember-source@7.1.0 (declares Node.js >= 20.19).

**Does ember-source work in Bun?**

Importing ember-source failed in Bun 1.4.0 on Sep 9, 2026: error: Cannot find package 'ember-source' from '/Users/boat/Projects/top-seo/data/probe-work/ember-source/imp.mjs'

**Does ember-source ship TypeScript types?**

Yes. ember-source bundles its own type declarations; no @types package is needed.

## Links

- [ember-source on npm](https://www.npmjs.com/package/ember-source)
- [Source repository](https://github.com/emberjs/ember.js)
- [HTML version](https://canirequire.com/package/ember-source/)
- [JSON version](https://canirequire.com/package/ember-source.json)

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