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Is source-map ESM-only? Can you require() it?

Generates and consumes source maps

Last verified Sep 9, 2026 against source-map@0.8.0. JSON

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

source-map ships CommonJS only. require("source-map") works everywhere. import "source-map" 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
0.8.0 (Jul 20, 2026)
Module format
CommonJS
Last CommonJS version
0.8.0
TypeScript types
Bundled
Node engines
>= 12
Weekly downloads
319.9M
License
BSD-3-Clause

Does source-map@0.8.0 actually load? Runtime test results

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

Runtimerequire("source-map")import "source-map"
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 source-map

ES modules (import)

import sourceMap from "source-map";

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 sourceMap = require("source-map");

Module format by version

Derived from the type, main and exports fields of every stable release on npm (70 versions; the newest 60 shown).

VersionsFormatFirst published
0.1.9 – 0.8.0CommonJSMar 1, 2013

Frequently asked

Is source-map ESM-only?

source-map@0.8.0 is a CommonJS package. source-map ships CommonJS only. require("source-map") works everywhere. import "source-map" 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 source-map with ES module syntax?

Yes. import sourceMap from "source-map" 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 source-map work in Bun?

Yes. import "source-map" loaded successfully in Bun 1.4 on Sep 9, 2026.

Does source-map ship TypeScript types?

Yes. source-map bundles its own type declarations; no @types package is needed.

Links

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