Font Awesome 5 font-family issue

Question

Your Unicode is wrong f107

a::after {
  content: "\f007";
  font-family: 'Font Awesome\ 5 Free';
}

<link href="https://use.fontawesome.com/releases/v5.0.1/css/all.css" rel="stylesheet">
<a>User</a>
<i class="fas fa-shopping-basket"></i>

Or in other case, font-weight: 900; will save you. Some icons in font awesome 5 not working without font-weight: 900;.

a::after {
  content: "\f007";
  font-family: 'Font Awesome\ 5 Free';
  font-weight: 900;
}