NPM is installed and configured; now it's time to start working. There are two ways to install NPM packages. Our choice will depend on how we want to use the package. The options are as listed:

• Globally: Install the given package globally as part of our command-line tools
• Locally: Install the given package to be available only in our application context

With this in mind, type the following command to install a new package:

$ npm install <package-name>

This instruction will create a folder called node_modules, where we will download all the packages we need. We can ensure that we have the package downloaded, entering the folder and checking the existence of a folder with a name similar to our package name. Run the following command to list all the packages installed in your project:

$ ls node_modules