Font Awesome

Font Awesome is a collection of web icons that can be utilized via CSS or HTML.

= Issues =

Font Awesome 5 font-family not working
After upgrading to font awesome version 5 some icons may not work. An empty square may take their place. The cause of this problem is the lack of the font-weight CSS setting.

Solution 

Add font-weight: 900; to your CSS styling

Example

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

= References =