Some people use
--save option when installing packages with
npm. For example, it is common to see the following command:
npm install packagename --save
What does the
--save option do? And why do some people never use it?
npm or node package manager is a package manager for node.
When you download a package using the
npm command, it installs the packages in the
node_modules folder and adds the installed module as a dependency in your
Prior to npm 5.0.0, npm installed the packages in
node_modules but didn’t add them as a dependency by default.
If you wanted to save the module as a dependency in the
package.json file, you had to do it using the
As of npm 5.0.0, you no longer need to use this option. Now npm saves all installed packages as dependencies by default.
If you want to save a package as a development-only dependency, you can do so by using the
A few other options are also available that allow you to control how a package is saved using
npm install. You can read about them on the official docs.