Font Awesome 5 font-family issue

Question

I integrated Font Awesome 5 in a project with bootstrap 4. When I recall a font via CSS it does not work. with Font Awesome 4 the code was as follows:

#mainN         


        

Answer 1

Strangely you must put the 'font-weight: 900' in some icons so that it shows them.

#mainNav .navbar-collapse .navbar-sidenav .nav-link-collapse:after {
  content: '\f107';
  font-family: 'Font Awesome\ 5 Free'; 
  font-weight: 900; /* Fix version 5.0.9 */
}