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Is web-vitals ESM-only? Can you require() it?

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Last verified Sep 9, 2026 against web-vitals@6.2.1. Markdown · JSON

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

web-vitals publishes both a CommonJS entry and a native ESM entry (ESM added in 0.1.0). require("web-vitals") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. import "web-vitals" works alongside it.

What to do

  1. Nothing to change. require("web-vitals") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. import * as webVitals from "web-vitals" works alongside it; use named imports for what the ESM entry exports.
  2. TypeScript: types are bundled; install nothing extra.
Latest
6.2.1 (Aug 26, 2026)
Module format
Dual (CommonJS + ESM)
Last CommonJS version
6.2.1
Native ESM since
0.1.0
TypeScript types
Bundled
Node engines
not declared
Weekly downloads
35.8M
License
Apache-2.0

Does web-vitals@6.2.1 actually load? Runtime test results

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

Runtimerequire("web-vitals")import "web-vitals"
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 web-vitals

ES modules (import)

import * as webVitals from "web-vitals";

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

CommonJS (require)

const webVitals = require("web-vitals");

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 (54 versions; the newest 54 shown).

VersionsFormatFirst published
3.0.0 – 6.2.1Dual (CommonJS + ESM)Aug 24, 2022
0.2.2 – 2.1.4CommonJSMay 12, 2020
0.1.0 – 0.2.1ESM-onlyApr 24, 2020

Frequently asked

Is web-vitals ESM-only?

web-vitals@6.2.1 ships CommonJS and ESM builds. web-vitals publishes both a CommonJS entry and a native ESM entry (ESM added in 0.1.0). require("web-vitals") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. import "web-vitals" works alongside it.

Can I require web-vitals?

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

Does web-vitals work in Bun?

Yes. import "web-vitals" loaded successfully in Bun 1.4.0 on Sep 9, 2026.

Does web-vitals ship TypeScript types?

Yes. web-vitals bundles its own type declarations; no @types package is needed.

Links

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