I have no experience with rangeslider, and without seeing the full page it is hard to estimate where it might go wrong.
I suggest you copy the example code from their website and modify bit by bit from there to see where you went wrong, testing on every turn to see where it breaks.
Like first copy their slider, then add the html id, then change some parameters, etc etc.
No its not, i put in all the implementations but the slider is still on the default look. It didn’t change …in fact it was as if i didn’t do anything.
here is what i tried: an example here in JsFiddle
and i linked its script with this: <script src="https://cdn.jsdelivr.net/npm/rangeslider.js@2.3.3/dist/rangeslider.min.js"></script>