# Is postcss-flexbugs-fixes ESM-only? Can you require() it?

> postcss-flexbugs-fixes@5.0.2 is a CommonJS package. CommonJS — require() works on every Node.js version we test.

PostCSS plugin This project tries to fix all of flexbug's issues

Last verified Sep 9, 2026 against postcss-flexbugs-fixes@5.0.2.

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

## Facts

- Latest: 5.0.2 (Nov 20, 2020)
- Module format: CommonJS
- Last CommonJS version: 5.0.2
- TypeScript types: @types/postcss-flexbugs-fixes
- Node engines: not declared
- Weekly downloads: 4.3M
- License: MIT

## Runtime test results for postcss-flexbugs-fixes@5.0.2

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

| Runtime | require("postcss-flexbugs-fixes") | import "postcss-flexbugs-fixes" |
|---|---|---|
| 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 postcss-flexbugs-fixes

ES modules:

```js
import postcssFlexbugsFixes from "postcss-flexbugs-fixes";
```

CommonJS:

```js
const postcssFlexbugsFixes = require("postcss-flexbugs-fixes");
```

## Module format by version

Derived from the type, main and exports fields of every stable release on npm (22 versions; the newest 22 shown).

| Versions | Format | First published |
|---|---|---|
| 0.0.1 – 5.0.2 | CommonJS | Jun 20, 2015 |

## Frequently asked

**Is postcss-flexbugs-fixes ESM-only?**

postcss-flexbugs-fixes@5.0.2 is a CommonJS package. postcss-flexbugs-fixes ships CommonJS only. require("postcss-flexbugs-fixes") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. import "postcss-flexbugs-fixes" 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 postcss-flexbugs-fixes with ES module syntax?**

Yes. import postcssFlexbugsFixes from "postcss-flexbugs-fixes" 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 postcss-flexbugs-fixes work in Bun?**

Yes. import "postcss-flexbugs-fixes" loaded successfully in Bun 1.4.0 on Sep 9, 2026.

**Does postcss-flexbugs-fixes ship TypeScript types?**

Not bundled. Install the community types with "npm install -D @types/postcss-flexbugs-fixes".

## Links

- [postcss-flexbugs-fixes on npm](https://www.npmjs.com/package/postcss-flexbugs-fixes)
- [Source repository](https://github.com/luisrudge/postcss-flexbugs-fixes)
- [HTML version](https://canirequire.com/package/postcss-flexbugs-fixes/)
- [JSON version](https://canirequire.com/package/postcss-flexbugs-fixes.json)

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