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Is karma-coverage-istanbul-reporter ESM-only? Can you require() it?

A karma reporter that uses the latest istanbul 1.x APIs (with full sourcemap support) to report coverage.

Last verified Sep 9, 2026 against karma-coverage-istanbul-reporter@3.0.3. JSON

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

karma-coverage-istanbul-reporter ships CommonJS only. require("karma-coverage-istanbul-reporter") works everywhere. import "karma-coverage-istanbul-reporter" 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
3.0.3 (May 28, 2020)
Module format
CommonJS
Last CommonJS version
3.0.3
TypeScript types
@types/karma-coverage-istanbul-reporter
Node engines
not declared
Weekly downloads
457K
License
MIT

Does karma-coverage-istanbul-reporter@3.0.3 actually load? Runtime test results

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

Runtimerequire("karma-coverage-istanbul-reporter")import "karma-coverage-istanbul-reporter"
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 karma-coverage-istanbul-reporter

ES modules (import)

import karmaCoverageIstanbulReporter from "karma-coverage-istanbul-reporter";

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 karmaCoverageIstanbulReporter = require("karma-coverage-istanbul-reporter");

Module format by version

Derived from the type, main and exports fields of every stable release on npm (31 versions; the newest 31 shown).

VersionsFormatFirst published
0.1.0 – 3.0.3CommonJSJan 25, 2017

Frequently asked

Is karma-coverage-istanbul-reporter ESM-only?

karma-coverage-istanbul-reporter@3.0.3 is a CommonJS package. karma-coverage-istanbul-reporter ships CommonJS only. require("karma-coverage-istanbul-reporter") works everywhere. import "karma-coverage-istanbul-reporter" 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 karma-coverage-istanbul-reporter with ES module syntax?

Yes. import karmaCoverageIstanbulReporter from "karma-coverage-istanbul-reporter" 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 karma-coverage-istanbul-reporter work in Bun?

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

Does karma-coverage-istanbul-reporter ship TypeScript types?

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

Links

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