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Is @jridgewell/gen-mapping ESM-only? Can you require() it?

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Last verified Sep 9, 2026 against @jridgewell/gen-mapping@0.3.13. JSON

Dual (CommonJS + ESM) Dual package — both require() and import work

@jridgewell/gen-mapping publishes both a CommonJS entry and a native ESM entry (ESM added in 0.1.0). require("@jridgewell/gen-mapping") and import "@jridgewell/gen-mapping" both work on every supported Node.js version and in Bun.

Latest
0.3.13 (Aug 12, 2025)
Module format
Dual (CommonJS + ESM)
Last CommonJS version
0.3.13
Native ESM since
0.1.0
TypeScript types
Bundled
Node engines
not declared
License
MIT

Does @jridgewell/gen-mapping@0.3.13 actually load? Runtime test results

Installed and executed on Sep 9, 2026 with require("@jridgewell/gen-mapping") from a CommonJS file and import "@jridgewell/gen-mapping" from an ES module.

Runtimerequire("@jridgewell/gen-mapping")import "@jridgewell/gen-mapping"
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 @jridgewell/gen-mapping

ES modules (import)

import genMapping from "@jridgewell/gen-mapping";

CommonJS (require)

const genMapping = require("@jridgewell/gen-mapping");

Module format by version

Derived from the type, main and exports fields of every stable release on npm (17 versions; the newest 17 shown).

VersionsFormatFirst published
0.1.0 – 0.3.13Dual (CommonJS + ESM)Apr 27, 2022

Frequently asked

Is @jridgewell/gen-mapping ESM-only?

@jridgewell/gen-mapping@0.3.13 ships CommonJS and ESM builds. @jridgewell/gen-mapping publishes both a CommonJS entry and a native ESM entry (ESM added in 0.1.0). require("@jridgewell/gen-mapping") and import "@jridgewell/gen-mapping" both work on every supported Node.js version and in Bun.

Can I require @jridgewell/gen-mapping?

Yes. @jridgewell/gen-mapping ships a CommonJS entry, so require("@jridgewell/gen-mapping") works on every Node.js version, alongside the native ESM entry for import.

Does @jridgewell/gen-mapping work in Bun?

Yes. import "@jridgewell/gen-mapping" loaded successfully in Bun 1.4 on Sep 9, 2026.

Does @jridgewell/gen-mapping ship TypeScript types?

Yes. @jridgewell/gen-mapping bundles its own type declarations; no @types package is needed.

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