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

> loose-envify@1.4.0 is a CommonJS package. CommonJS — require() works on every Node.js version we test.

Fast (and loose) selective `process.env` replacer using js-tokens instead of an AST

Last verified Sep 9, 2026 against loose-envify@1.4.0.

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

## Facts

- Latest: 1.4.0 (Jul 10, 2018)
- Module format: CommonJS
- Last CommonJS version: 1.4.0
- TypeScript types: none
- Node engines: not declared
- Weekly downloads: 65.0M
- License: MIT

## Runtime test results for loose-envify@1.4.0

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

| Runtime | require("loose-envify") | import "loose-envify" |
|---|---|---|
| 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 loose-envify

ES modules:

```js
import looseEnvify from "loose-envify";
```

CommonJS:

```js
const looseEnvify = require("loose-envify");
```

## Module format by version

Derived from the type, main and exports fields of every stable release on npm (6 versions; the newest 6 shown).

| Versions | Format | First published |
|---|---|---|
| 1.0.0 – 1.4.0 | CommonJS | Sep 21, 2015 |

## Frequently asked

**Is loose-envify ESM-only?**

loose-envify@1.4.0 is a CommonJS package. loose-envify ships CommonJS only. require("loose-envify") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. import "loose-envify" 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 loose-envify with ES module syntax?**

Yes. import looseEnvify from "loose-envify" 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 loose-envify work in Bun?**

Yes. import "loose-envify" loaded successfully in Bun 1.4.0 on Sep 9, 2026.

**Does loose-envify ship TypeScript types?**

No. loose-envify ships no type declarations and there is no @types package for it.

## Links

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

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