Important: This documentation covers Yarn 1 (Classic).
For Yarn 2+ docs and migration guide, see yarnpkg.com.

Package detail

is-npm

sindresorhus29.5mMIT6.0.0TypeScript support: included

Check if your code is running as an npm script

npm, yarn, is, check, detect, env, environment, run, script

readme

is-npm

Check if your code is running as an npm or yarn script

Install

npm install is-npm

Usage

import {isNpmOrYarn, isNpm, isYarn} from 'is-npm';

console.table({isNpmOrYarn, isNpm, isYarn});
$ node foo.js
# ┌─────────────┬────────┐
# │   (index)   │ Values │
# ├─────────────┼────────┤
# │ isNpmOrYarn │ false  │
# │    isNpm    │ false  │
# │   isYarn    │ false  │
# └─────────────┴────────┘
$ npm run foo
# ┌─────────────┬────────┐
# │   (index)   │ Values │
# ├─────────────┼────────┤
# │ isNpmOrYarn │  true  │
# │    isNpm    │  true  │
# │   isYarn    │ false  │
# └─────────────┴────────┘
$ yarn run foo
# ┌─────────────┬────────┐
# │   (index)   │ Values │
# ├─────────────┼────────┤
# │ isNpmOrYarn │  true  │
# │    isNpm    │ false  │
# │   isYarn    │  true  │
# └─────────────┴────────┘
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