Install package json code example

Example 1: install node_modules

npm install

Example 2: how to install dependencies from package.json

npm install // installs dependencies listed in package.json

Example 3: install node_modules folder

npm install (with no args, in package dir)

Example 4: install an npm package

npm install package-name

To save as a dependency:
npm install package-name --save

Example 5: install dependencies npm

# npm install