Icons

Font Awesome

To use the Font Awesome icons, you need to paste the following code into the <head> section.
<link href="//maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" rel="stylesheet" type="text/css">

Ionic

The icon font for Ionic Framework.

To use the Ionic icons, you need to paste the following code into the <head> section.
<link href="//code.ionicframework.com/ionicons/2.0.1/css/ionicons.min.css" rel="stylesheet" type="text/css">

Typicons

To use the Typicons icons, you need to paste the following code into the <head> section.
<link href="//cdn.rawgit.com/stephenhutchings/typicons.font/master/src/font/typicons.min.css" rel="stylesheet" type="text/css">

Linearicons

To use the Linearicons icons, you need to paste the following code into the <head> section.
<link href="//cdn.linearicons.com/free/1.0.0/icon-font.min.css" rel="stylesheet" type="text/css">