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Is istanbul-reports ESM-only? Can you require() it?

istanbul reports

Last verified Sep 9, 2026 against istanbul-reports@3.2.0. JSON

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

istanbul-reports ships CommonJS only. require("istanbul-reports") works everywhere. import "istanbul-reports" 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.

Latest
3.2.0 (Aug 18, 2025)
Module format
CommonJS
Last CommonJS version
3.2.0
TypeScript types
@types/istanbul-reports
Node engines
>=8
Weekly downloads
72.1M
License
BSD-3-Clause

Does istanbul-reports@3.2.0 actually load? Runtime test results

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

Runtimerequire("istanbul-reports")import "istanbul-reports"
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✓ works✓ works

How to import istanbul-reports

ES modules (import)

import istanbulReports from "istanbul-reports";

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 istanbulReports = require("istanbul-reports");

Module format by version

Derived from the type, main and exports fields of every stable release on npm (43 versions; the newest 43 shown).

VersionsFormatFirst published
1.0.0 – 3.2.0CommonJSOct 17, 2016

Frequently asked

Is istanbul-reports ESM-only?

istanbul-reports@3.2.0 is a CommonJS package. istanbul-reports ships CommonJS only. require("istanbul-reports") works everywhere. import "istanbul-reports" 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 istanbul-reports with ES module syntax?

Yes. import istanbulReports from "istanbul-reports" 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 istanbul-reports work in Bun?

Yes. import "istanbul-reports" loaded successfully in Bun 1.4 on Sep 9, 2026.

Does istanbul-reports ship TypeScript types?

Not bundled. Install the community types with "npm install -D @types/istanbul-reports".

Links

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