Interactive pricing component main (Some SASS, from a JSON)

it took me a while looking for a way to put colour to the range bar while it advances, I even asked someone who had already solved the challenge (@atekron), because I wanted to solve it only with CSS, in the end I had to put some javascript. It took me a while to call the data because I decided to do it from a JSON but everything went very well, I want to know if I could improve something in my layout or in my javascript, I appreciate your advice.