---
title: npm-start
section: 1
description: Start a package
---

### Synopsis

<!-- AUTOGENERATED USAGE DESCRIPTIONS -->

### Description

This runs a predefined command specified in the `"start"` property of a package's `"scripts"` object.

If the `"scripts"` object does not define a  `"start"` property, npm will run `node server.js`.

Note that this is different from the default node behavior of running the file specified in a package's `"main"` attribute when evoking with `node .`

As of [`npm@2.0.0`](https://blog.npmjs.org/post/98131109725/npm-2-0-0), you can use custom arguments when executing scripts.
Refer to [`npm run`](/commands/npm-run) for more details.

### Example

```json
{
  "scripts": {
    "start": "node foo.js"
  }
}
```

```bash
npm start

> npm@x.x.x start
> node foo.js

(foo.js output would be here)

```

### Configuration

<!-- AUTOGENERATED CONFIG DESCRIPTIONS -->

### See Also

* [npm run](/commands/npm-run)
* [npm scripts](/using-npm/scripts)
* [npm test](/commands/npm-test)
* [npm restart](/commands/npm-restart)
* [npm stop](/commands/npm-stop)
