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

> requires-port@1.0.0 is a CommonJS package. CommonJS — require() works on every Node.js version we test.

Check if a protocol requires a certain port number to be added to an URL.

Last verified Sep 9, 2026 against requires-port@1.0.0.

requires-port ships CommonJS only. require("requires-port") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. import "requires-port" 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("requires-port") 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 requiresPort from "requires-port"; then destructure. Named imports only work when Node.js can statically detect the exports.
3. TypeScript: npm install -D @types/requires-port

## Facts

- Latest: 1.0.0 (Oct 30, 2015)
- Module format: CommonJS
- Last CommonJS version: 1.0.0
- TypeScript types: @types/requires-port
- Node engines: not declared
- Weekly downloads: 34.9M
- License: MIT

## Runtime test results for requires-port@1.0.0

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

| Runtime | require("requires-port") | import "requires-port" |
|---|---|---|
| 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 requires-port

ES modules:

```js
import requiresPort from "requires-port";
```

CommonJS:

```js
const requiresPort = require("requires-port");
```

## Module format by version

Derived from the type, main and exports fields of every stable release on npm (3 versions; the newest 3 shown).

| Versions | Format | First published |
|---|---|---|
| 0.0.0 – 1.0.0 | CommonJS | Nov 7, 2014 |

## Frequently asked

**Is requires-port ESM-only?**

requires-port@1.0.0 is a CommonJS package. requires-port ships CommonJS only. require("requires-port") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. import "requires-port" 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 requires-port with ES module syntax?**

Yes. import requiresPort from "requires-port" 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 requires-port work in Bun?**

Yes. import "requires-port" loaded successfully in Bun 1.4.0 on Sep 9, 2026.

**Does requires-port ship TypeScript types?**

Not bundled. Install the community types with "npm install -D @types/requires-port".

## Links

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

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