node-environment-flags

> Polyfill/shim for process.allowedNodeEnvironmentFlags


node-environment-flags is a rough polyfill and shim for process.allowedNodeEnvironmentFlags, which was introduced in Node.js v10.10.0.

Table of Contents

- Install
- Usage
- Maintainers
- Contribute
- License

Install

Requires Node.js v6.0.0 or newer.

``shell
$ npm i node-environment-flags
`

Usage

If the current Node.js version is v10.10.0 or newer, the native implementation will be provided instead.

$3

`js
const nodeEnvironmentFlags = require('node-environment-flags');

nodeEnvironmentFlags.has('--require'); // true
`

$3

`js
require('node-environment-flags/shim')();

process.allowedNodeEnvironmentFlags.has('--require'); // true
`

Notes

- This module approximates what process.allowedNodeEnvironmentFlags provides in versions of Node.js prior to v10.10.0. Since process.allowedNodeEnvironmentFlags is based on NODE_OPTIONS` (introduced in v8.0.0), the set of supported flags for versions older than v8.0.0 is highly theoretical.
- Version ranges are matched using semver.
- This module is granular to the minor Node.js version number; patch version numbers are not considered.
- Results for unmaintained (odd) versions of Node.js are based on data for the most recent LTS version; e.g., running this module against Node.js v7.10.0 will yield the same results as would v6.14.0.
- Prior art: @ljharb's util.promisify

Maintainers

@boneskull

License

Copyright © 2018 Christopher Hiller. Licensed Apache-2.0.