A list of helpful and often used commands of the npm package directory

The following list contains npm commands that I use practically every day while working with npm packages in my node.js projects:

• npm init While using the command prompt the user is guided with a number questions in order to create a new package.json file. The command is very useful when starting a new node.js project.

• npm install Installs locally, in the current directory, all the modules that are listed as dependencies in the package.json file.

• npm install --save <package-name> Installs the most recent version of the specified package locally and updates the list of dependencies in the package.json file.

• npm install --save-dev <package-name> Installs the most recent version of the specified package locally as a development only package. This means that the code of the package is only required during the development of your web application and will not be included in any production code.

• npm install -g <package-name> Installs a package globally. Such packages make their commands available to every project using npm, for example the gulp plugin.

• npm link <package-name> Links the specified global package in the node_modules folder of your working directory, so that other packages working with the specified package do not have to create any separate local copy.

• npm remove --save <package-name> Removes a package from the current directory and also removes it’s reference from the dependencies in package.json file.

• npm dedupe Npm tries to normalize the dependencies of the installed packages and remove the ones that are used multiple times. This command can be especially useful in Windows environments where the allowed path of a folder is limited to 260 characters.

• npm view <package-name> version See the version of an installed package.

• npm ls Lists the installed packages and their versions in the current directory. You can also use npm list and see the same results as with npm ls. With npm list -g you can see a list with the globally installed plugins.

• npm uninstall <package-name> Uninstalls the specified package from your current directory.

• npm cache clean Mostly used when we have problems with installing or updating packages because of corrupted temporary files.

• npm dedupe Tries to normalize the modules hierarchy inside the node_modules path.

• npm outdated The command goes through the dependencies defined in your package.json file and points out the modules that could be updated. Take a look at the following example:

Feel free to write a comment about commands that are not in this list, so that I add them into the article.