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canirequire › Dual (CommonJS + ESM) › js-base64

Is js-base64 ESM-only? Can you require() it?

Yet another Base64 transcoder in pure-JS

Last verified Sep 9, 2026 against js-base64@3.9.3. Markdown · JSON

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

js-base64 publishes both a CommonJS entry and a native ESM entry (ESM added in 3.6.1). require("js-base64") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. import "js-base64" works alongside it.

What to do

  1. Nothing to change. require("js-base64") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. import * as jsBase64 from "js-base64" works alongside it; use named imports for what the ESM entry exports.
  2. TypeScript: types are bundled; install nothing extra.
Latest
3.9.3 (Aug 17, 2026)
Module format
Dual (CommonJS + ESM)
Last CommonJS version
3.9.3
Native ESM since
3.6.1
TypeScript types
Bundled
Node engines
not declared
Weekly downloads
17.1M
License
BSD-3-Clause

Does js-base64@3.9.3 actually load? Runtime test results

Installed and executed on Sep 9, 2026 with require("js-base64") from a CommonJS file and import "js-base64" from an ES module.

Runtimerequire("js-base64")import "js-base64"
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 js-base64

ES modules (import)

import * as jsBase64 from "js-base64";

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

CommonJS (require)

const jsBase64 = require("js-base64");

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 (75 versions; the newest 60 shown).

VersionsFormatFirst published
3.6.1 – 3.9.3Dual (CommonJS + ESM)May 22, 2021
2.4.0 – 3.6.0CommonJSNov 30, 2017

Frequently asked

Is js-base64 ESM-only?

js-base64@3.9.3 ships CommonJS and ESM builds. js-base64 publishes both a CommonJS entry and a native ESM entry (ESM added in 3.6.1). require("js-base64") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. import "js-base64" works alongside it.

Can I require js-base64?

Yes. js-base64 ships a CommonJS entry alongside the native ESM entry. require("js-base64") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun.

Does js-base64 work in Bun?

Yes. import "js-base64" loaded successfully in Bun 1.4.0 on Sep 9, 2026.

Does js-base64 ship TypeScript types?

Yes. js-base64 bundles its own type declarations; no @types package is needed.

Links

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