Class applied to the icon element in the DOM. Can be used to show icons from font libraries, e.g. 'material-icons', 'fa fa-magic', 'glyphicon-trash'.
Icon ligature for icon fonts supporting it, e.g. 'explore' in Material Icons (http://google.github.io/material-design-icons).
Path to the icon file, e.g. 'hamburger.svg' (absolute or relative to the embedding page). This also supports Data URIs.
Icon info