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

A code coverage tool for ES6 (babel)

Last verified Sep 9, 2026 against isparta@4.1.1. Markdown · JSON

CommonJS CommonJS — require() works on every Node.js version we test

isparta ships CommonJS only. require("isparta") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. import "isparta" also works because Node.js and Bun can import CommonJS from ES modules, but only the default export is guaranteed; named imports depend on Node's static analysis of the module.

What to do

  1. require("isparta") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun.
  2. From ES modules use the default import: import isparta from "isparta"; then destructure. Named imports only work when Node.js can statically detect the exports.
  3. TypeScript: no types are available for isparta; declare the module yourself if you need them.
Latest
4.1.1 (Dec 19, 2018)
Module format
CommonJS
Last CommonJS version
4.1.1
TypeScript types
None
Node engines
not declared
Weekly downloads
17K
License
WTFPL

Does isparta@4.1.1 actually load? Runtime test results

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

Runtimerequire("isparta")import "isparta"
Node.js 18✓ works✓ 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 isparta

ES modules (import)

import isparta from "isparta";

Named imports from a CommonJS package only work when Node.js can statically detect them. If a named import fails, use the default import and destructure.

CommonJS (require)

const isparta = require("isparta");

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 (35 versions; the newest 35 shown).

VersionsFormatFirst published
0.1.0 – 4.1.1CommonJSNov 17, 2014

Frequently asked

Is isparta ESM-only?

isparta@4.1.1 is a CommonJS package. isparta ships CommonJS only. require("isparta") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. import "isparta" also works because Node.js and Bun can import CommonJS from ES modules, but only the default export is guaranteed; named imports depend on Node's static analysis of the module.

Can I import isparta with ES module syntax?

Yes. import isparta from "isparta" works in Node.js and Bun because they support importing CommonJS modules. Named imports work only when Node.js can statically detect the exports.

Does isparta work in Bun?

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

Does isparta ship TypeScript types?

No. isparta ships no type declarations and there is no @types package for it.

Links

Other commonjs packages

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