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Read the npm guide if you are starting out with npm, it’s going to go in a lot of the basic details of it.
When you install a package using npm (or yarn), you can perform 2 types of installation:
- a local install
- a global install
By default, when you type an npm install command, like:
npm install lodash
the package is installed in the current file tree, under the node_modules subfolder.
As this happens, npm also adds the lodash entry in the dependencies property of the package.json file present in the current folder.
A global installation is performed using the -g flag:
npm install -g lodash
When this happens, npm won’t install the package under the local folder, but instead, it will use a global location.
Where, exactly?
The npm root -g command will tell you where that exact location is on your machine.
On macOS or Linux this location could be /usr/local/lib/node_modules.
On Windows it could be C:\Users\YOU\AppData\Roaming\npm\node_modules
If you use nvm to manage Node.js versions, however, that location would differ.
I for example use nvm and my packages location was shown as /Users/flavio/.nvm/versions/node/v8.9.0/lib/node_modules.
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