font awesome 5 using cdn code example
Example 1: font awesome 5 pro cdn link
<link href="https://pro.fontawesome.com/releases/v5.10.0/css/all.css" rel="stylesheet">
Example 2: fontawsome cddn
<link rel="stylesheet" href="https://pro.fontawesome.com/releases/v5.10.0/css/all.css" integrity="sha384-AYmEC3Yw5cVb3ZcuHtOA93w35dYTsvhLPVnYs9eStHfGJvOvKxVfELGroGkvsg+p" crossorigin="anonymous"/>