Add/ Remove classes on SVG

SVGClass.js

/**
 * Usage (where #map is ID of some element in svg document): 
 * $('#map').addSVGClass('some-class');
 * $('#map').removeSVGClass('some-other-class');
 */
(function ($) {
	$.fn.addSVGClass = function(className) {
		var re = new RegExp('\\b'+ className +'\\b');

		return this.each( function() {
			var c = $(this).attr('class');

			if ( !c  || !c.match(re)) {
				c = (!c ? '' : c +' ') + className;
				$(this).attr('class', c);
			}
		});
	};

	$.fn.removeSVGClass = function(className) {
		var re = new RegExp('\\s*\\b'+ className +'\\b\\s*');

		return this.each( function() {
			var c = $(this).attr('class');

			if (c) {
			   $(this).attr('class', c.replace(re, ''));
			}
		});
	};
}( jQuery ));