Node.js Package Manager

Node.js Package Manager (npm) is an essential tool for any Node.js developer. It provides two main functionalities:

1. Online Repository: npm hosts a vast collection of Node.js packages/modules, searchable at search.nodejs.org.
2. Command-Line Utility: npm enables developers to install packages, manage versions, and handle dependencies efficiently.

npm comes bundled with Node.js versions from v0.6.3 onward. To check the installed npm version, open your Node.js command prompt and type:

npm version

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Installing Modules Using npm

The general syntax to install a Node.js module is:

npm install <Module Name>

For example, to install a popular Node.js web framework called Express, execute:

npm install express

After running this command, npm downloads and installs the Express framework into your project’s directory.

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Global vs Local Installation

By default, npm installs modules locally, which means they are placed in the node_modules folder of your project directory. For example, installing Express locally creates a node_modules directory containing the Express package.

To view all locally installed modules, use:

npm ls

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Alternatively, you can install modules globally so that they are available across your system. Global modules are stored in a system-wide directory. To install Express globally, run:

npm install express -g

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The command output shows the installed module’s version and its global location.

Uninstalling a Module

To remove a Node.js module, use the following command:

npm uninstall express

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After uninstalling, you can verify that the module has been removed using:

npm ls

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The output will confirm that the module is no longer installed.

Searching for a Module

npm also allows you to search for modules using the following command:

npm search express

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This command lists all packages related to “express” available in the npm registry.

Node.js Package Manager simplifies module management, making it easier for developers to install, update, and maintain dependencies efficiently. For more detailed tutorials and updates, you can refer to UpdateGadh.

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