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

Returns a promise from a node-style callback function.

Last verified Sep 9, 2026 against @protobufjs/aspromise@1.1.2. Markdown · JSON

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

@protobufjs/aspromise ships CommonJS only. require("@protobufjs/aspromise") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. import "@protobufjs/aspromise" 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.

What to do

  1. require("@protobufjs/aspromise") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun.
  2. From ES modules use the default import: import aspromise from "@protobufjs/aspromise"; then destructure. Named imports only work when Node.js can statically detect the exports.
  3. TypeScript: types are bundled; install nothing extra.
Latest
1.1.2 (Apr 24, 2017)
Module format
CommonJS
Last CommonJS version
1.1.2
TypeScript types
Bundled
Node engines
not declared
Weekly downloads
55.0M
License
BSD-3-Clause

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

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

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

ES modules (import)

import aspromise from "@protobufjs/aspromise";

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

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 (7 versions; the newest 7 shown).

VersionsFormatFirst published
1.0.2 – 1.1.2CommonJSDec 12, 2016

Frequently asked

Is @protobufjs/aspromise ESM-only?

@protobufjs/aspromise@1.1.2 is a CommonJS package. @protobufjs/aspromise ships CommonJS only. require("@protobufjs/aspromise") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. import "@protobufjs/aspromise" 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/aspromise with ES module syntax?

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

Yes. import "@protobufjs/aspromise" loaded successfully in Bun 1.4.0 on Sep 9, 2026.

Does @protobufjs/aspromise ship TypeScript types?

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

Links

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