Font Awesome 4.7

I have tried npm install --save font-awesome
import font-awesome to your index.js file. Just add below line to your index.js file below import
import 'font-awesome/css/font-awesome.min.css';
OR
import '../node_modules/font-awesome/css/font-awesome.min.css';
But it doesn't show any icons

Anyone please suggest What is the problem