Node.js Package Manager

Node.js Package Manager (npm)

npm (Node Package Manager) is an essential tool for every Node.js developer. It provides two main functions: an online repository of packages/modules, and a command-line utility to install packages, manage versions, and handle dependencies. npm comes bundled with Node.js (v0.6.3 onward).

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Check npm Version

npm version

Installing Modules

npm install <module-name>

# Example
npm install express

Global vs Local Installation

By default npm installs modules locally into the project node_modules folder. Use -g to install globally (system-wide):

npm install express        # local
npm install express -g     # global
npm ls                     # list installed modules

Uninstalling and Searching

npm uninstall express
npm search express

package.json and Useful Commands

• npm init ÔÇö create a package.json for your project.
• npm install ÔÇö install all dependencies listed in package.json.
• npm update ÔÇö update packages to latest allowed versions.
• npm install pkg --save-dev ÔÇö add a development-only dependency.

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Conclusion

npm simplifies module management ÔÇö installing, updating, and maintaining dependencies. Understanding local vs global installs and package.json is fundamental to Node.js development. For more tutorials, refer to .

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