Update the contents of the readme file to be as detailed as possible, thereby, making it very clear for other developers to consume your npm package easily. Think of this like adding aliases to running your actual command instead of actually typing it out. You can add any number of custom scripts into the scripts section.All the other npm packages that you require during development goes into the devDependencies section. Only add npm packages to the dependencies section if your npm package requires them once installed on users' machines.The license identifier should be one from the SPDX license list and ideally should also be OSI approved.The version number has to be of a valid semver format.The value entered in the description doesn’t actually show up on the npm package page but shows up in the search results when you search for one.Apart from the rules outlined here, I would recommend researching an apt name for your npm package and then not changing this value ever. The name of the npm package is the most important item in the package.json file as that value uniquely identifies your package.However, here are a couple of special mentions:

A full explanation on each item of the package.json file can be found here.

Npm typescript