canirequire

canirequire › ESM-only › sisteransi

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

ANSI escape codes for some terminal swag

Last verified Sep 9, 2026 against sisteransi@2.0.0. Markdown · JSON

ESM-only ESM-only since 2.0.0 — last CommonJS version is 1.0.5

sisteransi dropped its CommonJS build in 2.0.0 (June 2026). The last version with a plain require()-able CommonJS entry is 1.0.5, published Mar 18, 2020.

On Node.js 20.19+, 22.12+ and newer, require("sisteransi") works with the latest version: Node.js loads synchronous ES modules through require(). Verified on Node.js 20, 22, 24 and 26. Node.js 18 has no require(esm), and sisteransi@2.0.0 declares Node.js >=20, so 18 is outside its supported range anyway.

sisteransi@2.0.0 declares engines ">=20", so Node.js 18 is outside its supported range regardless of module format.

What to do

  1. On Node.js 20.19+, 22.12+ and newer, require("sisteransi") works with the latest version: Node.js loads synchronous ES modules through require(). Verified on Node.js 20, 22, 24 and 26.
  2. From a CommonJS file, use a dynamic import inside an async function: const sisteransi = await import("sisteransi"). That works on every Node.js version the package supports (>=20).
  3. If you need a synchronous require() or run Node.js 18: npm install sisteransi@1.0.5, the last CommonJS release (published Mar 18, 2020).
  4. sisteransi@2.0.0 declares engines ">=20", so Node.js 18 is unsupported regardless: upgrade Node.js or pin an older release.
  5. TypeScript: types are bundled; install nothing extra.
Latest
2.0.0 (Jun 25, 2026)
Module format
ESM-only
Last CommonJS version
1.0.5
ESM-only since
2.0.0 (Jun 25, 2026)
TypeScript types
Bundled
Node engines
>=20
Weekly downloads
48.4M
License
MIT

Does sisteransi@2.0.0 actually load? Runtime test results

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

Runtimerequire("sisteransi")import "sisteransi"
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 1.4.0✓ works✓ works

How to import sisteransi

ES modules (import)

import * as sisteransi from "sisteransi";

Namespace import shown because the ESM entry may have no default export; use named imports for what it exports.

CommonJS (require)

// Node.js 20.19+, 22.12+ and newer (verified):
const sisteransi = require("sisteransi");

// Any Node.js version the package supports (>=20), from an async function:
async function main() {
  const sisteransi = await import("sisteransi");
}

// Or pin the last CommonJS release:
// npm install sisteransi@1.0.5

Module format by version

Derived from the type, main and exports fields of every stable release on npm, corrected where a runtime test of that version contradicted them (10 versions; the newest 10 shown).

VersionsFormatFirst published
2.0.0ESM-onlyJun 25, 2026
0.0.0 – 1.0.5CommonJSFeb 20, 2018

Frequently asked

Is sisteransi ESM-only?

sisteransi@2.0.0 is ESM-only. sisteransi dropped its CommonJS build in 2.0.0 (June 2026). The last version with a plain require()-able CommonJS entry is 1.0.5, published Mar 18, 2020.

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

1.0.5 is the last version of sisteransi with a CommonJS build. Install it with "npm install sisteransi@1.0.5". Every version from 2.0.0 on is ESM-only.

How do I use sisteransi from a CommonJS file?

From a CommonJS file, use a dynamic import inside an async function: const sisteransi = await import("sisteransi"). That works on every Node.js version the package supports (>=20). On Node.js 20.19+, 22.12+ and newer, require("sisteransi") works with the latest version: Node.js loads synchronous ES modules through require(). Verified on Node.js 20, 22, 24 and 26. Alternatively pin sisteransi@1.0.5.

Does sisteransi work in Bun?

Yes. import "sisteransi" loaded successfully in Bun 1.4.0 on Sep 9, 2026.

Does sisteransi ship TypeScript types?

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

Links

Other esm-only packages

Similar popularity