Why

Needed to check whether if a project has react-native as a dependency or not.

Install

yarn add is-package-dep # or npm i is-package-dep --save

Usage

const isPackageDep = require('is-package-dep');

isPackageDep('react-native')
  .then(() => {
    // Package has `react-native` as a dependency
  }).catch(err => {
    // Package doesn't have `react-native` as a dependency
  });

API

isPackageDep(packageName, [options])

Returns a boolean value that holds whether the package is installed or not.

packageName

Type: string The name of the package.

options

baseDir

Type: string Default: process.cwd() Directory to start looking up for the package.json file.

License

MIT © Lucas Bento

Thanks to Sindre Sorhus for read-pkg-up module.