How can I use Adobe Analytics in Javascript?

[#1]

I'm have an application running in Vue.js and I would like to integrate Adobe Analytics to track user journey, session length etc.. 

I saw this https://docs.adobe.com/content/help/en/analytics/implementation/js/overview.html but the documentation is not clear, like where to download the AppMeasurement.js and how to get started Adobe Analytics to your website.

[#2]

The AppMeasurement as well as the other libraries can be downloaded from Admin > Code Manager (you should have access to Adobe Analytics for that).