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Is @protobufjs/utf8 ESM-only? Can you require() it?

A minimal UTF8 implementation for number arrays.

Last verified Sep 9, 2026 against @protobufjs/utf8@1.1.2. JSON

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

@protobufjs/utf8 ships CommonJS only. require("@protobufjs/utf8") works everywhere. import "@protobufjs/utf8" 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
1.1.2 (Jul 5, 2026)
Module format
CommonJS
Last CommonJS version
1.1.2
TypeScript types
Bundled
Node engines
not declared
Weekly downloads
49.5M
License
BSD-3-Clause

Does @protobufjs/utf8@1.1.2 actually load? Runtime test results

Installed and executed on Sep 9, 2026 with require("@protobufjs/utf8") from a CommonJS file and import "@protobufjs/utf8" from an ES module.

Runtimerequire("@protobufjs/utf8")import "@protobufjs/utf8"
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 @protobufjs/utf8

ES modules (import)

import utf8 from "@protobufjs/utf8";

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 utf8 = require("@protobufjs/utf8");

Module format by version

Derived from the type, main and exports fields of every stable release on npm (11 versions; the newest 11 shown).

VersionsFormatFirst published
1.0.0 – 1.1.2CommonJSDec 11, 2016

Frequently asked

Is @protobufjs/utf8 ESM-only?

@protobufjs/utf8@1.1.2 is a CommonJS package. @protobufjs/utf8 ships CommonJS only. require("@protobufjs/utf8") works everywhere. import "@protobufjs/utf8" 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 @protobufjs/utf8 with ES module syntax?

Yes. import utf8 from "@protobufjs/utf8" 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 @protobufjs/utf8 work in Bun?

Yes. import "@protobufjs/utf8" loaded successfully in Bun 1.4 on Sep 9, 2026.

Does @protobufjs/utf8 ship TypeScript types?

Yes. @protobufjs/utf8 bundles its own type declarations; no @types package is needed.

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