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what is node package manager in Node.js

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Node Package Manager (NPM) is a package manager for Node.js that allows you to easily install, manage, and share packages of reusable code. It is built on top of the Node.js runtime and provides a command-line interface (CLI) for managing packages and their dependencies.

NPM is the default package manager for Node.js and is used by developers around the world to share and reuse code. NPM maintains a registry of over a million packages, ranging from simple utilities and helper functions to large frameworks and libraries. Packages can be installed globally or locally to a specific project, and can be easily managed using the npm command-line tool.

NPM provides a number of features that make it a powerful tool for managing Node.js packages:

  • Dependency management: NPM allows you to easily define and manage dependencies between your project and other packages. You can specify which packages your project depends on, and NPM will automatically download and install the required packages and their dependencies.

  • Version management: NPM allows you to specify which version of a package you want to install or use in your project. This ensures that your project remains consistent and does not break if a new version of a package introduces breaking changes.

  • Script execution: NPM allows you to define and execute custom scripts as part of your project's build and deployment process. This makes it easy to automate common tasks like compiling code, running tests, and deploying to a production environment.

  • Package publishing: NPM allows you to easily publish your own packages to the NPM registry, making it easy for others to discover and use your code.