npm package: @-xun/env
Description: Unified environment resolution and validation for any JS runtime
Author: Xunnamius
Latest version: 1.1.3

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Unified environment resolution and validation for any JS runtime
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# @-xun/env

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Unified environment resolution and validation for any JS runtime.

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---

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- [Install](#install)
- [Usage](#usage)
- [Appendix](#appendix)
  - [Published Package Details](#published-package-details)
  - [License](#license)
- [Contributing and Support](#contributing-and-support)
  - [Contributors](#contributors)

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## Install

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To install:

```shell
npm install @-xun/env
```

## Usage

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TODO

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## Appendix

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Further documentation can be found under [`docs/`][x-repo-docs].

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### Published Package Details

This is a [CJS2 package][x-pkg-cjs-mojito] with statically-analyzable exports
built by Babel for use in Node.js versions that are not end-of-life. For
TypeScript users, this package supports both `"Node10"` and `"Node16"` module
resolution strategies.

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<details><summary>Expand details</summary>

That means both CJS2 (via `require(...)`) and ESM (via `import { ... } from ...`
or `await import(...)`) source will load this package from the same entry points
when using Node. This has several benefits, the foremost being: less code
shipped/smaller package size, avoiding [dual package
hazard][x-pkg-dual-package-hazard] entirely, distributables are not
packed/bundled/uglified, a drastically less complex build process, and CJS
consumers aren't shafted.

Each entry point (i.e. `ENTRY`) in [`package.json`'s
`exports[ENTRY]`][x-repo-package-json] object includes one or more [export
conditions][x-pkg-exports-conditions]. These entries may or may not include: an
[`exports[ENTRY].types`][x-pkg-exports-types-key] condition pointing to a type
declaration file for TypeScript and IDEs, a
[`exports[ENTRY].module`][x-pkg-exports-module-key] condition pointing to
(usually ESM) source for Webpack/Rollup, a `exports[ENTRY].node` and/or
`exports[ENTRY].default` condition pointing to (usually CJS2) source for Node.js
`require`/`import` and for browsers and other environments, and [other
conditions][x-pkg-exports-conditions] not enumerated here. Check the
[package.json][x-repo-package-json] file to see which export conditions are
supported.

Note that, regardless of the [`{ "type": "..." }`][x-pkg-type] specified in
[`package.json`][x-repo-package-json], any JavaScript files written in ESM
syntax (including distributables) will always have the `.mjs` extension. Note
also that [`package.json`][x-repo-package-json] may include the
[`sideEffects`][x-pkg-side-effects-key] key, which is almost always `false` for
optimal [tree shaking][x-pkg-tree-shaking] where appropriate.

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</details>

### License

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See [LICENSE][x-repo-license].

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## Contributing and Support

**[New issues][x-repo-choose-new-issue] and [pull requests][x-repo-pr-compare]
are always welcome and greatly appreciated! 🤩** Just as well, you can [star 🌟
this project][x-badge-repo-link] to let me know you found it useful! ✊🏿 Or [buy
me a beer][x-repo-sponsor], I'd appreciate it. Thank you!

See [CONTRIBUTING.md][x-repo-contributing] and [SUPPORT.md][x-repo-support] for
more information.

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### Contributors

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See the [table of contributors][x-repo-contributors].

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[x-badge-blm-image]: https://xunn.at/badge-blm 'Join the movement!'
[x-badge-blm-link]: https://xunn.at/donate-blm
[x-badge-codecov-image]:
  https://img.shields.io/codecov/c/github/Xunnamius/api-utils/main?style=flat-square&token=HWRIOBAAPW&flag=package.main_env
  'Is this package well-tested?'
[x-badge-codecov-link]: https://codecov.io/gh/Xunnamius/api-utils
[x-badge-downloads-image]:
  https://img.shields.io/npm/dm/@-xun/env?style=flat-square
  'Number of times this package has been downloaded per month'
[x-badge-downloads-link]: https://npmtrends.com/@-xun/env
[x-badge-lastcommit-image]:
  https://img.shields.io/github/last-commit/Xunnamius/api-utils?style=flat-square
  'Latest commit timestamp'
[x-badge-license-image]:
  https://img.shields.io/npm/l/@-xun/env?style=flat-square
  "This package's source license"
[x-badge-license-link]: https://github.com/Xunnamius/api-utils/blob/main/LICENSE
[x-badge-npm-image]:
  https://xunn.at/npm-pkg-version/@-xun/env
  'Install this package using npm or yarn!'
[x-badge-npm-link]: https://npm.im/@-xun/env
[x-badge-repo-link]: https://github.com/Xunnamius/api-utils
[x-badge-semanticrelease-image]:
  https://xunn.at/badge-semantic-release
  'This repo practices continuous integration and deployment!'
[x-badge-semanticrelease-link]:
  https://github.com/semantic-release/semantic-release
[x-pkg-cjs-mojito]:
  https://dev.to/jakobjingleheimer/configuring-commonjs-es-modules-for-nodejs-12ed#publish-only-a-cjs-distribution-with-property-exports
[x-pkg-dual-package-hazard]:
  https://nodejs.org/api/packages.html#dual-package-hazard
[x-pkg-exports-conditions]:
  https://webpack.js.org/guides/package-exports#reference-syntax
[x-pkg-exports-module-key]:
  https://webpack.js.org/guides/package-exports#providing-commonjs-and-esm-version-stateless
[x-pkg-exports-types-key]:
  https://devblogs.microsoft.com/typescript/announcing-typescript-4-5-beta#packagejson-exports-imports-and-self-referencing
[x-pkg-side-effects-key]:
  https://webpack.js.org/guides/tree-shaking#mark-the-file-as-side-effect-free
[x-pkg-tree-shaking]: https://webpack.js.org/guides/tree-shaking
[x-pkg-type]:
  https://github.com/nodejs/node/blob/8d8e06a345043bec787e904edc9a2f5c5e9c275f/doc/api/packages.md#type
[x-repo-choose-new-issue]:
  https://github.com/Xunnamius/api-utils/issues/new/choose
[x-repo-contributing]: /CONTRIBUTING.md
[x-repo-contributors]: /README.md#contributors
[x-repo-docs]: docs
[x-repo-license]: ./LICENSE
[x-repo-package-json]: package.json
[x-repo-pr-compare]: https://github.com/Xunnamius/api-utils/compare
[x-repo-sponsor]: https://github.com/sponsors/Xunnamius
[x-repo-support]: /.github/SUPPORT.md