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Local vs Global npm Packages: A Practical Guide for Node.js Beginners

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npm, the package manager bundled with Node.js, offers two installation modes: local and global. Local installation places a package inside the project folder and records it in package.json, ensuring any developer who clones the repository can reproduce the same environment by running npm install. Global installation makes a package available system-wide via the command line but does not link it to any specific project, making it suitable for developer tools like nodemon or TypeScript rather than application libraries. A common beginner mistake is installing project dependencies globally, which causes 'Cannot find module' errors on other machines since global packages are not tracked in package.json. Modern Node.js development increasingly favors npx, which can run CLI tools without a global install, reducing version conflicts and keeping development environments cleaner.

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Local vs Global npm Packages: A Practical Guide for Node.js Beginners · ShortSingh