# Is safer-buffer ESM-only? Can you require() it?

> safer-buffer@2.1.2 is a CommonJS package. CommonJS — require() works on every Node.js version we test.

Modern Buffer API polyfill without footguns

Last verified Sep 9, 2026 against safer-buffer@2.1.2.

safer-buffer ships CommonJS only. require("safer-buffer") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. import "safer-buffer" 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("safer-buffer") 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 saferBuffer from "safer-buffer"; then destructure. Named imports only work when Node.js can statically detect the exports.
3. TypeScript: npm install -D @types/safer-buffer

## Facts

- Latest: 2.1.2 (Apr 8, 2018)
- Module format: CommonJS
- Last CommonJS version: 2.1.2
- TypeScript types: @types/safer-buffer
- Node engines: not declared
- Weekly downloads: 110.7M
- License: MIT

## Runtime test results for safer-buffer@2.1.2

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

| Runtime | require("safer-buffer") | import "safer-buffer" |
|---|---|---|
| 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 safer-buffer

ES modules:

```js
import saferBuffer from "safer-buffer";
```

CommonJS:

```js
const saferBuffer = require("safer-buffer");
```

## Module format by version

Derived from the type, main and exports fields of every stable release on npm (6 versions; the newest 6 shown).

| Versions | Format | First published |
|---|---|---|
| 2.0.0 – 2.1.2 | CommonJS | Mar 19, 2018 |

## Frequently asked

**Is safer-buffer ESM-only?**

safer-buffer@2.1.2 is a CommonJS package. safer-buffer ships CommonJS only. require("safer-buffer") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. import "safer-buffer" 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 safer-buffer with ES module syntax?**

Yes. import saferBuffer from "safer-buffer" 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 safer-buffer work in Bun?**

Yes. import "safer-buffer" loaded successfully in Bun 1.4.0 on Sep 9, 2026.

**Does safer-buffer ship TypeScript types?**

Not bundled. Install the community types with "npm install -D @types/safer-buffer".

## Links

- [safer-buffer on npm](https://www.npmjs.com/package/safer-buffer)
- [Source repository](https://github.com/ChALkeR/safer-buffer)
- [HTML version](https://canirequire.com/package/safer-buffer/)
- [JSON version](https://canirequire.com/package/safer-buffer.json)

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