npm package: @stdlib/process-env
Description: Object containing the user environment.
Author: The Stdlib Authors
Latest version: 0.2.3

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<details>
  <summary>
    About stdlib...
  </summary>
  <p>We believe in a future in which the web is a preferred environment for numerical computation. To help realize this future, we've built stdlib. stdlib is a standard library, with an emphasis on numerical and scientific computation, written in JavaScript (and C) for execution in browsers and in Node.js.</p>
  <p>The library is fully decomposable, being architected in such a way that you can swap out and mix and match APIs and functionality to cater to your exact preferences and use cases.</p>
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  <p>To join us in bringing numerical computing to the web, get started by checking us out on <a href="https://github.com/stdlib-js/stdlib">GitHub</a>, and please consider <a href="https://opencollective.com/stdlib">financially supporting stdlib</a>. We greatly appreciate your continued support!</p>
</details>

# ENV

[![NPM version][npm-image]][npm-url] [![Build Status][test-image]][test-url] [![Coverage Status][coverage-image]][coverage-url] <!-- [![dependencies][dependencies-image]][dependencies-url] -->

> Object containing the user environment.

<section class="installation">

## Installation

```bash
npm install @stdlib/process-env
```

</section>

<section class="usage">

## Usage

```javascript
var ENV = require( '@stdlib/process-env' );
```

#### ENV

`Object` containing the user environment.

```javascript
var user = ENV.USER;
// returns <string>
```

</section>

<!-- /.usage -->

<section class="notes">

## Notes

-   See [environ(7)][man-environ].
-   Modifications to `ENV` are local to the process in which `ENV` is modified.
-   On Windows systems, environment variables are case insensitive.
-   In browser environments, `ENV` is an **empty** object.
-   Be careful when modifying environment variables as the environment variable object represents shared state. Accordingly, modifications affect all environment variable consumers.

</section>

<!-- /.notes -->

<section class="examples">

## Examples

<!-- eslint no-undef: "error" -->

```javascript
var ENV = require( '@stdlib/process-env' );

console.dir( ENV );
```

</section>

<!-- /.examples -->

<!-- Section for related `stdlib` packages. Do not manually edit this section, as it is automatically populated. -->

<section class="related">

* * *

## See Also

-   <span class="package-name">[`@stdlib/process-argv`][@stdlib/process/argv]</span><span class="delimiter">: </span><span class="description">array containing command-line arguments passed when launching the calling process.</span>

</section>

<!-- /.related -->

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<section class="main-repo" >

* * *

## Notice

This package is part of [stdlib][stdlib], a standard library for JavaScript and Node.js, with an emphasis on numerical and scientific computing. The library provides a collection of robust, high performance libraries for mathematics, statistics, streams, utilities, and more.

For more information on the project, filing bug reports and feature requests, and guidance on how to develop [stdlib][stdlib], see the main project [repository][stdlib].

#### Community

[![Chat][chat-image]][chat-url]

---

## License

See [LICENSE][stdlib-license].


## Copyright

Copyright &copy; 2016-2026. The Stdlib [Authors][stdlib-authors].

</section>

<!-- /.stdlib -->

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<section class="links">

[npm-image]: http://img.shields.io/npm/v/@stdlib/process-env.svg
[npm-url]: https://npmjs.org/package/@stdlib/process-env

[test-image]: https://github.com/stdlib-js/process-env/actions/workflows/test.yml/badge.svg?branch=v0.2.3
[test-url]: https://github.com/stdlib-js/process-env/actions/workflows/test.yml?query=branch:v0.2.3

[coverage-image]: https://img.shields.io/codecov/c/github/stdlib-js/process-env/main.svg
[coverage-url]: https://codecov.io/github/stdlib-js/process-env?branch=main

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[stdlib]: https://github.com/stdlib-js/stdlib

[stdlib-authors]: https://github.com/stdlib-js/stdlib/graphs/contributors

[umd]: https://github.com/umdjs/umd
[es-module]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Modules

[deno-url]: https://github.com/stdlib-js/process-env/tree/deno
[deno-readme]: https://github.com/stdlib-js/process-env/blob/deno/README.md
[umd-url]: https://github.com/stdlib-js/process-env/tree/umd
[umd-readme]: https://github.com/stdlib-js/process-env/blob/umd/README.md
[esm-url]: https://github.com/stdlib-js/process-env/tree/esm
[esm-readme]: https://github.com/stdlib-js/process-env/blob/esm/README.md
[branches-url]: https://github.com/stdlib-js/process-env/blob/main/branches.md

[stdlib-license]: https://raw.githubusercontent.com/stdlib-js/process-env/main/LICENSE

[man-environ]: http://man7.org/linux/man-pages/man7/environ.7.html

<!-- <related-links> -->

[@stdlib/process/argv]: https://www.npmjs.com/package/@stdlib/process-argv

<!-- </related-links> -->

</section>

<!-- /.links -->