We're going to add bootstrap 4 to our Angular 2 app.
First, you need to install Angular-CLI
Installing Angular CLI : https://goo.gl/S18SzB
The easiest way to add Bootstrap V4 to your Angular 2 App
go to Its website and copy all CDN links and paste it in your Angular 2 app's Index.html file right below the meta tag.
To create a new component Open up your CLI and Type NG commands
ng g component [your component name here]
for more detail go to: https://goo.gl/S18SzB