# Is file-saver ESM-only? Can you require() it?

> file-saver@2.0.5 is a CommonJS package. CommonJS — require() works on every Node.js version we test.

An HTML5 saveAs() FileSaver implementation

Last verified Sep 9, 2026 against file-saver@2.0.5.

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

## Facts

- Latest: 2.0.5 (Nov 19, 2020)
- Module format: CommonJS
- Last CommonJS version: 2.0.5
- TypeScript types: @types/file-saver
- Node engines: not declared
- Weekly downloads: 5.0M
- License: MIT

## Runtime test results for file-saver@2.0.5

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

| Runtime | require("file-saver") | import "file-saver" |
|---|---|---|
| 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 file-saver

ES modules:

```js
import fileSaver from "file-saver";
```

CommonJS:

```js
const fileSaver = require("file-saver");
```

## Module format by version

Derived from the type, main and exports fields of every stable release on npm (14 versions; the newest 14 shown).

| Versions | Format | First published |
|---|---|---|
| 1.2.0 – 2.0.5 | CommonJS | May 25, 2016 |

## Frequently asked

**Is file-saver ESM-only?**

file-saver@2.0.5 is a CommonJS package. file-saver ships CommonJS only. require("file-saver") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. import "file-saver" 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 file-saver with ES module syntax?**

Yes. import fileSaver from "file-saver" 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 file-saver work in Bun?**

Yes. import "file-saver" loaded successfully in Bun 1.4.0 on Sep 9, 2026.

**Does file-saver ship TypeScript types?**

Not bundled. Install the community types with "npm install -D @types/file-saver".

## Links

- [file-saver on npm](https://www.npmjs.com/package/file-saver)
- [Source repository](https://github.com/eligrey/FileSaver.js)
- [HTML version](https://canirequire.com/package/file-saver/)
- [JSON version](https://canirequire.com/package/file-saver.json)

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