Installation questions for touchscreens

[RickBrenner]

In Bootstrap-3.3.6 and Bootstrap-submenu-2.0.3:
Following the installation directions at the demo page https://vsn4ik.github.io/bootstrap-submenu, bootstrap-submenu works fine for mouse use. Not for touchscreens.
But bootstrap-submenu works for touchscreens if I add:

• <link rel="stylesheet" href="https://vsn4ik.github.io/bootstrap-submenu/assets/css/docs.css">
• <script src="https://vsn4ik.github.io/bootstrap-submenu/assets/js/docs.js" defer></script>

I found the above in the demo page https://vsn4ik.github.io/bootstrap-submenu (tho I prefixed the domain and parent folder to the file paths). Why does the demo page not follow the template recommended as the installation? If the demo page did follow the template, it would be more convincing proof of concept, and more useful to users.
Are the "assets" files part of the distribution? If not, how can I make bootstrap-submenu work for touchscreens?
Thanks.