Global Install vs Local Install
NodeJS and NPM allow two methods of installing dependencies/packages: Local and Global. This is mainly used when adding a package or dependency as part of a specific project you're working on. The package would be installed (with its dependencies) in node_modules folder under your project. In addition, in package.json file there will be a new line added for the installed dependency under the label dependencies. At this point - you can start using the package in your NodeJS code by importing the package. Unlike the local install, you can install packages and dependencies globally. This would install it in a system path, and these packages would be available to any program which runs on this specific computer. This method is often used for installing command line tools (for example, even npm program is a Globally installed npm package).
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