# is-npm [](https://travis-ci.org/sindresorhus/is-npm) > Check if your code is running as an [npm](https://docs.npmjs.com/misc/scripts) or [yarn](https://yarnpkg.com/lang/en/docs/cli/run/) script ## Install ``` $ npm install is-npm ``` ## Usage ```js const {isNpmOrYarn, isNpm, isYarn} = require('is-npm'); console.table({isNpmOrYarn, isNpm, isYarn}); ``` ```sh $ 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 │ # └─────────────┴────────┘ ``` --- <div align="center"> <b> <a href="https://tidelift.com/subscription/pkg/npm-is-npm?utm_source=npm-is-npm&utm_medium=referral&utm_campaign=readme">Get professional support for this package with a Tidelift subscription</a> </b> <br> <sub> Tidelift helps make open source sustainable for maintainers while giving companies<br>assurances about security, maintenance, and licensing for their dependencies. </sub> </div>