#B Package dependencies needed for application to run Listing 1 Example package.json file in a new Express project The following listing shows an example package.json file that you might find in the root of a new Express project. This file can contain various metadata about a project, including the packages that it depends on to run. In every Node application there should be a file in the root folder of the application called package.json. npm is a package manager that gets installed when you install Node, which gives you the ability to download Node modules or packages to extend the functionality of your application.īut how do these things work together, and how do you use them? A key piece to understanding this puzzle is the package.json file. In basic terms, an Express application is simply a Node application that happens to use Express as the framework. In this article, excerpted from the book Getting MEAN with Mongo, Express, Angular, and Node, I talk about how to manage Node.js project dependencies with nmp and a package json file.Įxpress is a web application framework for Node.

Npm update dependencies