@fortawesome/fontawesome-pro version code example

Example 1: how to install font-aweseome usin npm

<link rel="stylesheet" type="text/css" href="https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" />

Example 2: npm font awesome 5

import '@fortawesome/fontawesome-free/js/all.js';