# Is proc-log ESM-only? Can you require() it?

> proc-log@7.0.0 is a CommonJS package. CommonJS — require() works on every Node.js version we test.

just emit 'log' events on the process object

Last verified Sep 9, 2026 against proc-log@7.0.0.

proc-log ships CommonJS only. require("proc-log") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js ^22.22.2 || ^24.15.0 || >=26.0.0. import "proc-log" 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("proc-log") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js ^22.22.2 || ^24.15.0 || >=26.0.0.
2. From ES modules use the default import: import procLog from "proc-log"; then destructure. Named imports only work when Node.js can statically detect the exports.
3. TypeScript: npm install -D @types/proc-log

## Facts

- Latest: 7.0.0 (May 8, 2026)
- Module format: CommonJS
- Last CommonJS version: 7.0.0
- TypeScript types: @types/proc-log
- Node engines: ^22.22.2 || ^24.15.0 || >=26.0.0
- Weekly downloads: 52.4M
- License: ISC

## Runtime test results for proc-log@7.0.0

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

| Runtime | require("proc-log") | import "proc-log" |
|---|---|---|
| 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 proc-log

ES modules:

```js
import procLog from "proc-log";
```

CommonJS:

```js
const procLog = require("proc-log");
```

## Module format by version

Derived from the type, main and exports fields of every stable release on npm (11 versions; the newest 11 shown).

| Versions | Format | First published |
|---|---|---|
| 1.0.0 – 7.0.0 | CommonJS | Apr 15, 2021 |

## Frequently asked

**Is proc-log ESM-only?**

proc-log@7.0.0 is a CommonJS package. proc-log ships CommonJS only. require("proc-log") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js ^22.22.2 || ^24.15.0 || >=26.0.0. import "proc-log" 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 proc-log with ES module syntax?**

Yes. import procLog from "proc-log" 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 proc-log work in Bun?**

Yes. import "proc-log" loaded successfully in Bun 1.4.0 on Sep 9, 2026.

**Does proc-log ship TypeScript types?**

Not bundled. Install the community types with "npm install -D @types/proc-log".

## Links

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

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