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Is karma-sourcemap-loader ESM-only? Can you require() it?

Karma plugin that locates and loads existing javascript source map files.

Last verified Sep 9, 2026 against karma-sourcemap-loader@0.4.0. JSON

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

karma-sourcemap-loader ships CommonJS only. require("karma-sourcemap-loader") works everywhere. import "karma-sourcemap-loader" 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
0.4.0 (Feb 5, 2023)
Module format
CommonJS
Last CommonJS version
0.4.0
TypeScript types
None
Node engines
not declared
Weekly downloads
391K
License
MIT

Does karma-sourcemap-loader@0.4.0 actually load? Runtime test results

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

Runtimerequire("karma-sourcemap-loader")import "karma-sourcemap-loader"
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-sourcemap-loader

ES modules (import)

import karmaSourcemapLoader from "karma-sourcemap-loader";

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 karmaSourcemapLoader = require("karma-sourcemap-loader");

Module format by version

Derived from the type, main and exports fields of every stable release on npm (13 versions; the newest 13 shown).

VersionsFormatFirst published
0.1.0 – 0.4.0CommonJSFeb 18, 2014

Frequently asked

Is karma-sourcemap-loader ESM-only?

karma-sourcemap-loader@0.4.0 is a CommonJS package. karma-sourcemap-loader ships CommonJS only. require("karma-sourcemap-loader") works everywhere. import "karma-sourcemap-loader" 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-sourcemap-loader with ES module syntax?

Yes. import karmaSourcemapLoader from "karma-sourcemap-loader" 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-sourcemap-loader work in Bun?

Yes. import "karma-sourcemap-loader" loaded successfully in Bun 1.4 on Sep 9, 2026.

Does karma-sourcemap-loader ship TypeScript types?

No. karma-sourcemap-loader ships no type declarations and there is no @types package for it.

Links

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