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Is fill-range ESM-only? Can you require() it?

Fill in a range of numbers or letters, optionally passing an increment or `step` to use, or create a regex-compatible range with `options.toRegex`

Last verified Sep 9, 2026 against fill-range@7.1.1. JSON

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

fill-range ships CommonJS only. require("fill-range") works everywhere. import "fill-range" 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
7.1.1 (May 21, 2024)
Module format
CommonJS
Last CommonJS version
7.1.1
TypeScript types
@types/fill-range
Node engines
>=8
Weekly downloads
116.7M
License
MIT

Does fill-range@7.1.1 actually load? Runtime test results

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

Runtimerequire("fill-range")import "fill-range"
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 fill-range

ES modules (import)

import fillRange from "fill-range";

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 fillRange = require("fill-range");

Module format by version

Derived from the type, main and exports fields of every stable release on npm (33 versions; the newest 33 shown).

VersionsFormatFirst published
0.1.0 – 7.1.1CommonJSNov 25, 2014

Frequently asked

Is fill-range ESM-only?

fill-range@7.1.1 is a CommonJS package. fill-range ships CommonJS only. require("fill-range") works everywhere. import "fill-range" 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 fill-range with ES module syntax?

Yes. import fillRange from "fill-range" 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 fill-range work in Bun?

Yes. import "fill-range" loaded successfully in Bun 1.4 on Sep 9, 2026.

Does fill-range ship TypeScript types?

Not bundled. Install the community types with "npm install -D @types/fill-range".

Links

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