Creating a package file

As mentioned when discussing how Node does path lookups, modules may be contained within a folder. If you are developing a program that will work well as a module for someone else to use, you should organize that module within its own folder, and create a package.json file within that folder.

As we’ve seen throughout the examples in this book, a package.json file describes a module, usefully documenting the module’s name, version number, dependencies, and so forth. It must exist if you would like to publish your package via npm. In this section, we will outline only a few key properties of this file, and we will also provide more detail on some of the obscure ones.

Try $ npm help json to fetch detailed documentation for all available package.json fields, or visit: https://docs.npmjs.com/files/package.json.
A package.json file must conform...