canirequire

canirequire › ESM-only › callsites

Is callsites ESM-only? Can you require() it?

Get callsites from the V8 stack trace API

Last verified Sep 9, 2026 against callsites@4.2.0. JSON

ESM-only ESM-only since 4.0.0 — last CommonJS version is 3.1.0

callsites dropped its CommonJS build in 4.0.0 (August 2021). The last version you can require() on every Node.js version, including 18 and older, is 3.1.0, published Apr 6, 2019.

On Node.js 20.19+, 22.12+ and every newer release, require("callsites") works anyway: Node can load synchronous ES modules through require(). Verified on Node 20, 22, 24, 26. Node.js 18 and older still fail with ERR_REQUIRE_ESM.

Latest
4.2.0 (Jun 29, 2024)
Module format
ESM-only
Last CommonJS version
3.1.0
ESM-only since
4.0.0 (Aug 8, 2021)
TypeScript types
Bundled
Node engines
>=12.20
Weekly downloads
136.7M
License
MIT

Does callsites@4.2.0 actually load? Runtime test results

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

Runtimerequire("callsites")import "callsites"
Node.js 18✗ failsERR_REQUIRE_ESM✓ 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 callsites

ES modules (import)

import callsites from "callsites";

CommonJS (require)

// Node.js 20.19+ / 22.12+ / newer (package has no top-level await):
const callsites = require("callsites");

// Any Node.js version:
const callsites = await import("callsites");

// Or pin the last CommonJS release:
// npm install callsites@3.1.0

Module format by version

Derived from the type, main and exports fields of every stable release on npm (10 versions; the newest 10 shown).

VersionsFormatFirst published
4.0.0 – 4.2.0ESM-onlyAug 8, 2021
0.1.0 – 3.1.0CommonJSApr 19, 2014

Frequently asked

Is callsites ESM-only?

callsites@4.2.0 is ESM-only. callsites dropped its CommonJS build in 4.0.0 (August 2021). The last version you can require() on every Node.js version, including 18 and older, is 3.1.0, published Apr 6, 2019.

Which version of callsites still supports CommonJS / require()?

3.1.0 is the last version of callsites with a CommonJS build. Install it with "npm install callsites@3.1.0". Every version from 4.0.0 on is ESM-only.

How do I use callsites from a CommonJS file?

Use a dynamic import: const mod = await import("callsites"). On Node.js 20.19+, 22.12+ and newer, a plain require("callsites") also works for ESM packages that do not use top-level await. Alternatively pin callsites@3.1.0.

Does callsites work in Bun?

Yes. import "callsites" loaded successfully in Bun 1.4 on Sep 9, 2026.

Does callsites ship TypeScript types?

Yes. callsites bundles its own type declarations; no @types package is needed.

Links

Other esm-only packages

Similar popularity