NodeJS Package Manager:

NPM or Node.js Package Manager manages the Node.js packages, which contains the files a user needs for a module. The NPM program is installed with Node.js installable automatically.

Downloading and Installing Modules using npm:

Open the command line interface.
Type Command npm install <Module Name>.

Example:

npm install upper-case

To include a Package:

Like any other module, a package is used the same way, i.e, Node.js require() function with the name of the module is used.

Syntax:

var variable_name = require(‘module_name’);

Local Installation of Packages:

By default, NPM creates a directory named “node_modules” in the current directory. All the installed packages are placed in this folder. This whole process is termed as local installation of packages.

Global Installation of Packages:

NPM places all the Globally installed packages in the system directory. For global installation of packages

Open Node.js command prompt.
Type Command npm install -g <Module Name>.

Example:

npm install -g upper-case

Here first line tells about the module version and its location where it is getting installed.

Uninstalling Modules using npm:

Open the command line interface.

Type Command npm uninstall <Module Name>.

Example:

npm uninstall upper-case

NodeJS Interview Questions

Tags: NodeJS Package Manager, NodeJS Tutorial