how to install module in node js code example

Example 1: how to install node modules

npm install -g node-modules

Example 2: install npm package globally

npm install package-name -g

Example 3: install an npm package

npm install package-name

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

Example 4: 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