canirequire

canirequire › ESM-only › is-unicode-supported

Is is-unicode-supported ESM-only? Can you require() it?

Detect whether the terminal supports Unicode

Last verified Sep 9, 2026 against is-unicode-supported@2.1.0. Markdown · JSON

ESM-only ESM-only since 1.0.0 — last CommonJS version is 0.1.0

is-unicode-supported dropped its CommonJS build in 1.0.0 (April 2021). The last version with a plain require()-able CommonJS entry is 0.1.0, published Mar 17, 2021; it declares support for Node.js >=10.

On Node.js 20.19+, 22.12+ and newer, require("is-unicode-supported") works with the latest version: Node.js loads synchronous ES modules through require(). Verified on Node.js 20, 22, 24 and 26. On Node.js 18, which has no require(esm), require("is-unicode-supported") fails with ERR_REQUIRE_ESM.

What to do

  1. On Node.js 20.19+, 22.12+ and newer, require("is-unicode-supported") 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 isUnicodeSupported = await import("is-unicode-supported"). That works on every Node.js version the package supports (>=18).
  3. If you need a synchronous require() or run Node.js 18: npm install is-unicode-supported@0.1.0, the last CommonJS release (published Mar 17, 2021); it declares Node.js >=10.
  4. TypeScript: types are bundled; install nothing extra.
Latest
2.1.0 (Sep 9, 2024)
Module format
ESM-only
Last CommonJS version
0.1.0
ESM-only since
1.0.0 (Apr 18, 2021)
TypeScript types
Bundled
Node engines
>=18
Weekly downloads
59.5M
License
MIT

Does is-unicode-supported@2.1.0 actually load? Runtime test results

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

Runtimerequire("is-unicode-supported")import "is-unicode-supported"
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 is-unicode-supported

ES modules (import)

import * as isUnicodeSupported from "is-unicode-supported";

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 isUnicodeSupported = require("is-unicode-supported");

// Any Node.js version the package supports (>=18), from an async function:
async function main() {
  const isUnicodeSupported = await import("is-unicode-supported");
}

// Or pin the last CommonJS release (declares Node.js >=10):
// npm install is-unicode-supported@0.1.0

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 (7 versions; the newest 7 shown).

VersionsFormatFirst published
1.0.0 – 2.1.0ESM-onlyApr 18, 2021
0.1.0CommonJSMar 17, 2021

Frequently asked

Is is-unicode-supported ESM-only?

is-unicode-supported@2.1.0 is ESM-only. is-unicode-supported dropped its CommonJS build in 1.0.0 (April 2021). The last version with a plain require()-able CommonJS entry is 0.1.0, published Mar 17, 2021; it declares support for Node.js >=10.

Which version of is-unicode-supported still supports CommonJS / require()?

0.1.0 is the last version of is-unicode-supported with a CommonJS build; it declares Node.js >=10. Install it with "npm install is-unicode-supported@0.1.0". Every version from 1.0.0 on is ESM-only.

How do I use is-unicode-supported from a CommonJS file?

From a CommonJS file, use a dynamic import inside an async function: const isUnicodeSupported = await import("is-unicode-supported"). That works on every Node.js version the package supports (>=18). On Node.js 20.19+, 22.12+ and newer, require("is-unicode-supported") works with the latest version: Node.js loads synchronous ES modules through require(). Verified on Node.js 20, 22, 24 and 26. Alternatively pin is-unicode-supported@0.1.0 (declares Node.js >=10).

Does is-unicode-supported work in Bun?

Yes. import "is-unicode-supported" loaded successfully in Bun 1.4.0 on Sep 9, 2026.

Does is-unicode-supported ship TypeScript types?

Yes. is-unicode-supported bundles its own type declarations; no @types package is needed.

Links

Other esm-only packages

Similar popularity