Every text node in any element with the `icons` class will be parsed unless it's in a script or style.
[ui-flag] [ui-invalid] [invalid] [ui-invalid!] [ui-CAPITal]
Glyphicons: [glyphicon-flag]
Font Awesome: [fa-flag] [fa-flag-spin] [fa-flag-spin-pulse]
Framework7: [f7-home]
Ionicons: [ion-ionic]
Typicons: [typcn-home]
Foundation: [fi-home]
Metro UI: [mif-home]
Elusive: [el-home]
Octicons: [octicon-mark-github]