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Is react-app-polyfill ESM-only? Can you require() it?

Polyfills for various browsers including commonly used language features

Last verified Sep 9, 2026 against react-app-polyfill@3.0.0. Markdown · JSON

No JS entry point No JavaScript entry point

react-app-polyfill does not expose a JavaScript entry point in package.json. It is likely a CLI, a stylesheet, a type-definition package, or an asset bundle, so require() and import are not the way to use it.

What to do

  1. Do not require() or import react-app-polyfill: it has no JavaScript entry point. Use it as a CLI (npx react-app-polyfill), a stylesheet, an asset, or a type-definition package as its README describes.
  2. TypeScript: no types are available for react-app-polyfill; declare the module yourself if you need them.
Latest
3.0.0 (Dec 14, 2021)
Module format
No JS entry point
Last CommonJS version
n/a
TypeScript types
None
Node engines
>=14
Weekly downloads
2.1M
License
MIT

Does react-app-polyfill@3.0.0 actually load? Runtime test results

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

Runtimerequire("react-app-polyfill")import "react-app-polyfill"
Node.js 18✗ failsMODULE_NOT_FOUND✗ failsERR_MODULE_NOT_FOUND
Node.js 20✗ failsMODULE_NOT_FOUND✗ failsERR_MODULE_NOT_FOUND
Node.js 22✗ failsMODULE_NOT_FOUND✗ failsERR_MODULE_NOT_FOUND
Node.js 24✗ failsMODULE_NOT_FOUND✗ failsERR_MODULE_NOT_FOUND
Node.js 26✗ failsMODULE_NOT_FOUND✗ failsERR_MODULE_NOT_FOUND
Bun 1.4.0✗ failsError✗ failsError

A failing require() on a CommonJS package usually means the package needs a browser/DOM global, a peer dependency, or a native binary that is not available in a bare Node.js process.

How to import react-app-polyfill

ES modules (import)

import * as reactAppPolyfill from "react-app-polyfill";

CommonJS (require)

Not applicable.

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 (17 versions; the newest 17 shown).

VersionsFormatFirst published
0.0.0 – 3.0.0No JS entry pointSep 25, 2018

Frequently asked

Is react-app-polyfill ESM-only?

react-app-polyfill@3.0.0 has no importable main entry. react-app-polyfill does not expose a JavaScript entry point in package.json. It is likely a CLI, a stylesheet, a type-definition package, or an asset bundle, so require() and import are not the way to use it.

Does react-app-polyfill work in Bun?

Importing react-app-polyfill failed in Bun 1.4.0 on Sep 9, 2026: error: Cannot find package 'react-app-polyfill' from '/Users/boat/Projects/top-seo/data/probe-work/react-app-polyfill/imp.mjs'

Does react-app-polyfill ship TypeScript types?

No. react-app-polyfill ships no type declarations and there is no @types package for it.

Links

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