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Is side-channel-weakmap ESM-only? Can you require() it?

Store information about any JS value in a side channel. Uses WeakMap if available.

Last verified Sep 9, 2026 against side-channel-weakmap@1.0.2. JSON

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

side-channel-weakmap ships CommonJS only. require("side-channel-weakmap") works everywhere. import "side-channel-weakmap" 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
1.0.2 (Dec 11, 2024)
Module format
CommonJS
Last CommonJS version
1.0.2
TypeScript types
Bundled
Node engines
>= 0.4
Weekly downloads
78.5M
License
MIT

Does side-channel-weakmap@1.0.2 actually load? Runtime test results

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

Runtimerequire("side-channel-weakmap")import "side-channel-weakmap"
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 side-channel-weakmap

ES modules (import)

import sideChannelWeakmap from "side-channel-weakmap";

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 sideChannelWeakmap = require("side-channel-weakmap");

Module format by version

Derived from the type, main and exports fields of every stable release on npm (3 versions; the newest 3 shown).

VersionsFormatFirst published
1.0.0 – 1.0.2CommonJSDec 10, 2024

Frequently asked

Is side-channel-weakmap ESM-only?

side-channel-weakmap@1.0.2 is a CommonJS package. side-channel-weakmap ships CommonJS only. require("side-channel-weakmap") works everywhere. import "side-channel-weakmap" 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 side-channel-weakmap with ES module syntax?

Yes. import sideChannelWeakmap from "side-channel-weakmap" 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 side-channel-weakmap work in Bun?

Yes. import "side-channel-weakmap" loaded successfully in Bun 1.4 on Sep 9, 2026.

Does side-channel-weakmap ship TypeScript types?

Yes. side-channel-weakmap bundles its own type declarations; no @types package is needed.

Links

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