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Is slice-ansi ESM-only? Can you require() it?

Slice a string with ANSI escape codes

Last verified Sep 9, 2026 against slice-ansi@9.0.0. JSON

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

slice-ansi 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 Feb 16, 2020.

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

slice-ansi@9.0.0 declares engines ">=22", so Node.js 18, 20 are outside its supported range regardless of module format.

Latest
9.0.0 (Apr 4, 2026)
Module format
ESM-only
Last CommonJS version
4.0.0
ESM-only since
5.0.0 (Apr 16, 2021)
TypeScript types
Bundled
Node engines
>=22
Weekly downloads
101.8M
License
MIT

Does slice-ansi@9.0.0 actually load? Runtime test results

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

Runtimerequire("slice-ansi")import "slice-ansi"
Node.js 18✗ failsERR_REQUIRE_ESM✗ failsSyntaxError
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 slice-ansi

ES modules (import)

import sliceAnsi from "slice-ansi";

CommonJS (require)

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

// Any Node.js version:
const sliceAnsi = await import("slice-ansi");

// Or pin the last CommonJS release:
// npm install slice-ansi@4.0.0

Module format by version

Derived from the type, main and exports fields of every stable release on npm (16 versions; the newest 16 shown).

VersionsFormatFirst published
5.0.0 – 9.0.0ESM-onlyApr 16, 2021
0.0.2 – 4.0.0CommonJSSep 26, 2015

Frequently asked

Is slice-ansi ESM-only?

slice-ansi@9.0.0 is ESM-only. slice-ansi 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 Feb 16, 2020.

Which version of slice-ansi still supports CommonJS / require()?

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

How do I use slice-ansi from a CommonJS file?

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

Does slice-ansi work in Bun?

Yes. import "slice-ansi" loaded successfully in Bun 1.4 on Sep 9, 2026.

Does slice-ansi ship TypeScript types?

Yes. slice-ansi bundles its own type declarations; no @types package is needed.

Links

Other esm-only packages

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