Include package json dependencies for npm install global - node.js

Question

I only know npm install locally particular plugin into the dependencies object in the package.json. Been doing npm install -g on many packages manually, but how do I include it inside the package.json?
eg. my current package:
{
"name": "mypackage",
"version": "0.0.1",
"private": true,
"scripts": {
"start": "node node_modules/react-native/local-cli/cli.js start",
"test": "jest"
},
"dependencies": {
"axios": "^0.19.0",
"lodash": "^4.17.15",
"react": "16.8.3",
}
}
To include my global install modules into mypackage
├── expo-cli#3.0.8
├── npm#6.9.0
├── npm-check-updates#3.1.20
├── react-devtools#4.1.0
├── react-native-cli#2.0.1
└── typescript#3.6.3

Answer 1

Go to your project root directory and execute,
npm install your-package-name
Or you can put the package-name manually in your package.json file and run,
npm install
But your package is already globally installed on your machine.
When you install an npm package, globally, using npm install -g my-package, then the package is globally available in your machine. You can use it anywhere in your machine.
But without global flag -g when you install a package, it only available inside the project scope.
So when a package is available globally, you do not need to install it in your project scope. It's a code redundant.

Answer 2

just type
$ npm install name-of-the-dependency
This is going to install the dependency in the package.json

Answer 3

The package will be added to your package.json when you install it from the project directory without -g
npm install --save package
you can also save the developer dependencies by
npm install --save-dev package
when you want to download a package for developers, such as grunt, gulp, then use this option
when you are distributing your code to production, these dependencies will not be available.
If you want to include packages like angular-cli you can install it as normal package and access it by referring the path inside the node_modules. like node_modules/.bin/ng build --prod

Answer 4

Appreciate with the guidance guys, just updated my question. So to add my global modules into mypackage gonna be like as per below?
{
"name": "mypackage",
"version": "0.0.1",
"private": true,
"scripts": {
"start": "node node_modules/react-native/local-cli/cli.js start",
"test": "jest"
},
"dependencies": {
"axios": "^0.19.0",
"lodash": "^4.17.15",
"react": "16.8.3",
"expo-cli": "3.0.8",
"npm": "6.9.0",
"npm-check-updates": "3.1.20",
"react-devtools": "4.1.0",
"react-native-cli": "2.0.1",
"typescript": "3.6.3"
}
}