How to add libraries vue in laravel?

I'm using laravel 5.4, with webpack and vue. I'm not sure how to add new libraries to use in vue.

For example, I run

npm install --save jquery vue2-select

What do I need to do next? I need to add:

Import Selectize from 'vue2-selectize'

or

Require ('vue2-selectize')

In the

resources / assets / js / app.js

file or

resources / assets / js / bootstrap.js

?

Can someone help me with the correct order to work?

Thank you!

via Chebli Mohamed