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canirequire › Dual (CommonJS + ESM) › pretty-format

Is pretty-format ESM-only? Can you require() it?

Stringify any JavaScript value.

Last verified Sep 9, 2026 against pretty-format@30.5.1. Markdown · JSON

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

pretty-format publishes both a CommonJS entry and a native ESM entry (ESM added in 30.0.0). require("pretty-format") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js ^18.14.0 || ^20.0.0 || ^22.0.0 || >=24.0.0. import "pretty-format" works alongside it.

What to do

  1. Nothing to change. require("pretty-format") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js ^18.14.0 || ^20.0.0 || ^22.0.0 || >=24.0.0. import * as prettyFormat from "pretty-format" works alongside it; use named imports for what the ESM entry exports.
  2. TypeScript: types are bundled; install nothing extra.
Latest
30.5.1 (Sep 1, 2026)
Module format
Dual (CommonJS + ESM)
Last CommonJS version
30.5.1
Native ESM since
30.0.0
TypeScript types
Bundled
Node engines
^18.14.0 || ^20.0.0 || ^22.0.0 || >=24.0.0
Weekly downloads
150.8M
License
MIT

Does pretty-format@30.5.1 actually load? Runtime test results

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

Runtimerequire("pretty-format")import "pretty-format"
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 pretty-format

ES modules (import)

import * as prettyFormat from "pretty-format";

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

CommonJS (require)

const prettyFormat = require("pretty-format");

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 (142 versions; the newest 60 shown).

VersionsFormatFirst published
30.0.0 – 30.5.1Dual (CommonJS + ESM)Jun 10, 2025
26.4.2 – 29.7.0CommonJSAug 22, 2020

Frequently asked

Is pretty-format ESM-only?

pretty-format@30.5.1 ships CommonJS and ESM builds. pretty-format publishes both a CommonJS entry and a native ESM entry (ESM added in 30.0.0). require("pretty-format") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js ^18.14.0 || ^20.0.0 || ^22.0.0 || >=24.0.0. import "pretty-format" works alongside it.

Can I require pretty-format?

Yes. pretty-format ships a CommonJS entry alongside the native ESM entry. require("pretty-format") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js ^18.14.0 || ^20.0.0 || ^22.0.0 || >=24.0.0.

Does pretty-format work in Bun?

Yes. import "pretty-format" loaded successfully in Bun 1.4.0 on Sep 9, 2026.

Does pretty-format ship TypeScript types?

Yes. pretty-format bundles its own type declarations; no @types package is needed.

Links

Other dual (commonjs + esm) packages

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