Installing packages using npm | #revildo_code

Installing packages using npm | Nodejs full course | Full tutorial for beginners | #revildo_code



By default, npm install will install all modules listed as dependencies in package. json . With the --production flag (or when the NODE_ENV environment variable is set to production ), npm will not install modules listed in devDependencies



There is no difference, since "npm i" is an alias for "npm install". They both do the exact same thing (install or update all the dependencies in your package-lock.



To install a module from npm globally, you'll simply need to use the --global flag when running the install command to have the module install globally, rather than locally (to the current directory). Note: One caveat with global modules is that, by default, npm will install them to a system directory, not a local one.




npm install downloads a package and it's dependencies. npm install can be run with or without arguments. When run without arguments, npm install downloads dependencies defined in a package. json file and generates a node_modules folder with the installed modules.




install a package, npm uses the following algorithm:

load the existing node_modules tree from disk.

clone the tree.

fetch the package.json and assorted metadata and add it to the clone.

walk the clone and add any missing dependencies.

dependencies will be added as close to the top as is possible.




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