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For nodejs program, each nodejs project can have a package.json which like pom.xml for java to manage the dependency. To init a package.json for a new project, just execute ' npm init ' under project folder in command line. then use the default value or change for each question, aftera all, a package.json file be created under project folder ( you can modify it anytime).

When install dependency of project, switch to the project folder, use ' npm install -S ' option -S means to append this package as depedency into package.json

Commit pakcage.json with auto script to code repo, when other person clone the repo to local, he just only need to execute ' npm install ' under the folder where package.json inside. he will get all dependency in package.json installed.

after npm install execute done. you will find a new folder: node_modules will under project folder, the node_modules folder is the place to store project dependency. The folder under node_modules named as package name is the pakcage installation path (Reminder don't commit node_modules folder to coder repo)

When script import a package/module via require(''), it will load the module from this node_modules folder, then parent folder unitl the root path, then nodejs globel package folder, then nodejs build-in module.

More detail you can find from : https://docs.npmjs.com/