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Is decimal.js-light ESM-only? Can you require() it?

An arbitrary-precision Decimal type for JavaScript.

Last verified Sep 9, 2026 against decimal.js-light@2.5.1. JSON

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

decimal.js-light ships CommonJS only. require("decimal.js-light") works everywhere. import "decimal.js-light" 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.

It also declares a "module" field, so bundlers such as webpack, Vite and esbuild pick up an ESM build for tree-shaking.

Latest
2.5.1 (Sep 30, 2020)
Module format
CommonJS
Last CommonJS version
2.5.1
TypeScript types
Bundled
Node engines
not declared
Weekly downloads
47.4M
License
MIT

Does decimal.js-light@2.5.1 actually load? Runtime test results

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

Runtimerequire("decimal.js-light")import "decimal.js-light"
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 decimal.js-light

ES modules (import)

import decimalJsLight from "decimal.js-light";

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 decimalJsLight = require("decimal.js-light");

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
1.0.2 – 2.5.1CommonJSFeb 25, 2016

Frequently asked

Is decimal.js-light ESM-only?

decimal.js-light@2.5.1 is a CommonJS package. decimal.js-light ships CommonJS only. require("decimal.js-light") works everywhere. import "decimal.js-light" 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 decimal.js-light with ES module syntax?

Yes. import decimalJsLight from "decimal.js-light" 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 decimal.js-light work in Bun?

Yes. import "decimal.js-light" loaded successfully in Bun 1.4 on Sep 9, 2026.

Does decimal.js-light ship TypeScript types?

Yes. decimal.js-light bundles its own type declarations; no @types package is needed.

Links

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