What are the main uses for the NPM package.json file?

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I read from here that the dependencies in the package.json file allow people to install the dependencies if they install your project through npm-

Finally, the dependencies field is used to list all the dependencies of your project that are available on npm. When someone installs your project through npm, all the dependencies listed will be installed as well. Additionally, if someone runs npm install in the root directory of your project, it will install all the dependencies to ./node_modules.

Where will all the dependencies be installed to if someone doesn't run npm install in the root directory of your project?

Also, what if they choose to clone this project through Github instead? It would be ready to go anyway, right? Then at that point what is the purpose of the package.json file besides giving the user meta data about the project?

package.json npm node.js
2 Answers

Each Node.js project must contain at least one package.json file, usually located in the root directory of your project. This file identifies the project and lists the packages your project depends on, making your build reproducible.

You can create a package.json file by using a text editor, but the quickest way is to run the npm init command and pass it the -y flag

  npm init -y
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