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Is function.prototype.name ESM-only? Can you require() it?

An ES2015 spec-compliant `Function.prototype.name` shim

Last verified Sep 9, 2026 against function.prototype.name@1.2.0. JSON

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

function.prototype.name ships CommonJS only. require("function.prototype.name") works everywhere. import "function.prototype.name" 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
1.2.0 (Jun 11, 2026)
Module format
CommonJS
Last CommonJS version
1.2.0
TypeScript types
Bundled
Node engines
>= 0.4
Weekly downloads
77.1M
License
MIT

Does function.prototype.name@1.2.0 actually load? Runtime test results

Installed and executed on Sep 9, 2026 with require("function.prototype.name") from a CommonJS file and import "function.prototype.name" from an ES module.

Runtimerequire("function.prototype.name")import "function.prototype.name"
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 function.prototype.name

ES modules (import)

import functionPrototypeName from "function.prototype.name";

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 functionPrototypeName = require("function.prototype.name");

Module format by version

Derived from the type, main and exports fields of every stable release on npm (14 versions; the newest 14 shown).

VersionsFormatFirst published
1.0.0 – 1.2.0CommonJSFeb 27, 2016

Frequently asked

Is function.prototype.name ESM-only?

function.prototype.name@1.2.0 is a CommonJS package. function.prototype.name ships CommonJS only. require("function.prototype.name") works everywhere. import "function.prototype.name" 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 function.prototype.name with ES module syntax?

Yes. import functionPrototypeName from "function.prototype.name" 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 function.prototype.name work in Bun?

Yes. import "function.prototype.name" loaded successfully in Bun 1.4 on Sep 9, 2026.

Does function.prototype.name ship TypeScript types?

Yes. function.prototype.name bundles its own type declarations; no @types package is needed.

Links

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