Answers for "put scss files to js components"

install scss in react js

$ npm install node-sass --save
$ # or
$ yarn add node-sass

sass file

Sass is a popular preprocessor scripting language that gets compiled into css. 
There are 2 file extensions:
1) .scss (newer syntax, commonly used)
2) .sass (older syntax with strict indentation)
Learn More at https://sass-lang.com/