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Is strip-bom ESM-only? Can you require() it?

Strip UTF-8 byte order mark (BOM) from a string

Last verified Sep 9, 2026 against strip-bom@5.0.0. JSON

ESM-only ESM-only since 5.0.0 — last CommonJS version is 4.0.0

strip-bom dropped its CommonJS build in 5.0.0 (April 2021). The last version you can require() on every Node.js version, including 18 and older, is 4.0.0, published Apr 28, 2019.

On Node.js 20.19+, 22.12+ and every newer release, require("strip-bom") 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
5.0.0 (Apr 16, 2021)
Module format
ESM-only
Last CommonJS version
4.0.0
ESM-only since
5.0.0 (Apr 16, 2021)
TypeScript types
@types/strip-bom
Node engines
>=12
Weekly downloads
136.6M
License
MIT

Does strip-bom@5.0.0 actually load? Runtime test results

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

Runtimerequire("strip-bom")import "strip-bom"
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 strip-bom

ES modules (import)

import stripBom from "strip-bom";

CommonJS (require)

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

// Any Node.js version:
const stripBom = await import("strip-bom");

// Or pin the last CommonJS release:
// npm install strip-bom@4.0.0

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
5.0.0ESM-onlyApr 16, 2021
0.1.0 – 4.0.0CommonJSApr 4, 2014

Frequently asked

Is strip-bom ESM-only?

strip-bom@5.0.0 is ESM-only. strip-bom dropped its CommonJS build in 5.0.0 (April 2021). The last version you can require() on every Node.js version, including 18 and older, is 4.0.0, published Apr 28, 2019.

Which version of strip-bom still supports CommonJS / require()?

4.0.0 is the last version of strip-bom with a CommonJS build. Install it with "npm install strip-bom@4.0.0". Every version from 5.0.0 on is ESM-only.

How do I use strip-bom from a CommonJS file?

Use a dynamic import: const mod = await import("strip-bom"). On Node.js 20.19+, 22.12+ and newer, a plain require("strip-bom") also works for ESM packages that do not use top-level await. Alternatively pin strip-bom@4.0.0.

Does strip-bom work in Bun?

Yes. import "strip-bom" loaded successfully in Bun 1.4 on Sep 9, 2026.

Does strip-bom ship TypeScript types?

Not bundled. Install the community types with "npm install -D @types/strip-bom".

Links

Other esm-only packages

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