React Opium Select. How to remove styles and animations?

Question

Web development

How can styles and animations be removed from opium?
Opium Select is a very beautiful thing! But I don't use react on my site, and now I'm interested in the question: "How to copy/paste" - all styles and animations?
I looked at the code, and it turns out it's not even a select, but just a div, ul, span...
What should I do?)
Here's the link: https://codepen.io/prasanjit/pen/LdjQWv?page=2
Thank you!