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Is unique-filename ESM-only? Can you require() it?

Generate a unique filename for use in temporary directories or caches.

Last verified Sep 9, 2026 against unique-filename@6.0.0. JSON

CommonJS CommonJS — require() works on every Node.js version

unique-filename ships CommonJS only. require("unique-filename") works everywhere. import "unique-filename" 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.

Latest
6.0.0 (May 15, 2026)
Module format
CommonJS
Last CommonJS version
6.0.0
TypeScript types
None
Node engines
^22.22.2 || ^24.15.0 || >=26.0.0
Weekly downloads
24.6M
License
ISC

Does unique-filename@6.0.0 actually load? Runtime test results

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

Runtimerequire("unique-filename")import "unique-filename"
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✓ works✓ works

How to import unique-filename

ES modules (import)

import uniqueFilename from "unique-filename";

Named imports from a CommonJS package only work when Node.js can statically detect them. If a named import fails, use the default import and destructure.

CommonJS (require)

const uniqueFilename = require("unique-filename");

Module format by version

Derived from the type, main and exports fields of every stable release on npm (9 versions; the newest 9 shown).

VersionsFormatFirst published
1.0.0 – 6.0.0CommonJSMay 7, 2015

Frequently asked

Is unique-filename ESM-only?

unique-filename@6.0.0 is a CommonJS package. unique-filename ships CommonJS only. require("unique-filename") works everywhere. import "unique-filename" 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 unique-filename with ES module syntax?

Yes. import uniqueFilename from "unique-filename" 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 unique-filename work in Bun?

Yes. import "unique-filename" loaded successfully in Bun 1.4 on Sep 9, 2026.

Does unique-filename ship TypeScript types?

No. unique-filename ships no type declarations and there is no @types package for it.

Links

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