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Is mustache ESM-only? Can you require() it?

Logic-less {{mustache}} templates with JavaScript

Last verified Sep 9, 2026 against mustache@4.2.0. Markdown · JSON

Dual (CommonJS + ESM) Dual package — require() works on every Node.js version we test; import works too

mustache publishes both a CommonJS entry and a native ESM entry (ESM added in 4.2.0). require("mustache") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. import "mustache" works alongside it.

What to do

  1. Nothing to change. require("mustache") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. import * as mustache from "mustache" works alongside it; use named imports for what the ESM entry exports.
  2. TypeScript: npm install -D @types/mustache
Latest
4.2.0 (Mar 28, 2021)
Module format
Dual (CommonJS + ESM)
Last CommonJS version
4.2.0
Native ESM since
4.2.0
TypeScript types
@types/mustache
Node engines
not declared
Weekly downloads
15.6M
License
MIT

Does mustache@4.2.0 actually load? Runtime test results

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

Runtimerequire("mustache")import "mustache"
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 1.4.0✓ works✓ works

How to import mustache

ES modules (import)

import * as mustache from "mustache";

Namespace import shown because the ESM entry may have no default export; use named imports for what it exports.

CommonJS (require)

const mustache = require("mustache");

Module format by version

Derived from the type, main and exports fields of every stable release on npm, corrected where a runtime test of that version contradicted them (34 versions; the newest 34 shown).

VersionsFormatFirst published
4.2.0Dual (CommonJS + ESM)Mar 28, 2021
0.4.0 – 4.1.0CommonJSJan 9, 2012

Frequently asked

Is mustache ESM-only?

mustache@4.2.0 ships CommonJS and ESM builds. mustache publishes both a CommonJS entry and a native ESM entry (ESM added in 4.2.0). require("mustache") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. import "mustache" works alongside it.

Can I require mustache?

Yes. mustache ships a CommonJS entry alongside the native ESM entry. require("mustache") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun.

Does mustache work in Bun?

Yes. import "mustache" loaded successfully in Bun 1.4.0 on Sep 9, 2026.

Does mustache ship TypeScript types?

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

Links

Other dual (commonjs + esm) packages

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