how to install node modules in node js code example

Example 1: how to install node modules

npm install -g node-modules

Example 2: install npm globally

npm install npm@latest -g

Example 3: install node_modules

npm install

Example 4: install node modules

// Install as a dependency
npm install --save packageName
// OR
npm install --save package1 package2
// OR
npm install --save package@version
// OR
npm i -s packageName

// Install as a dev-dependency
npm install --save-dev package@version
// OR
npm i -D packageName

//Install globally
npm install --global packageName
//OR
npm i -g packageName

// You might need SU access on macos/linux to install globally

Example 5: install node modules from package.json

npm install (with no args, in package dir)
npm install [<@scope>/]
npm install [<@scope>/]@
npm install [<@scope>/]@
npm install [<@scope>/]@
npm install :/
npm install 
npm install 
npm install 
npm install 

aliases: npm i, npm add
common options: [-P|--save-prod|-D|--save-dev|-O|--save-optional] [-E|--save-exact] [-B|--save-bundle] [--no-save] [--dry-run]

Example 6: how to install node_module

ls node_modules

//this command above is typed when you install a new vueJS project and dont have a 'node_modules', then run npm run serve