Build 0.3.3.

 // rivets.js
-// version: 0.3.2
+// version: 0.3.3
 // author: Michael Richards
 // license: MIT
 (function() {
-  var Rivets, attributeBinding, bindEvent, eventBinding, getInputValue, iterationBinding, rivets, unbindEvent,
+  var Rivets, attributeBinding, bindEvent, classBinding, eventBinding, getInputValue, iterationBinding, rivets, unbindEvent,
     __bind = function(fn, me){ return function(){ return fn.apply(me, arguments); }; },
     __slice = [].slice,
     __indexOf = [].indexOf || function(item) { for (var i = 0, l = this.length; i < l; i++) { if (i in this && this[i] === item) return i; } return -1; };
@@ -38,6 +38,8 @@
         switch (this.options.special) {
           case "event":
             return eventBinding(this.type);
+          case "class":
+            return classBinding(this.type);
           case "iteration":
             return iterationBinding(this.type);
           default:
@@ -161,13 +163,14 @@
     };
 
     View.prototype.build = function() {
-      var bindingRegExp, el, eventRegExp, iterationRegExp, iterator, node, parseNode, skipNodes, _i, _len, _ref, _results,
+      var bindingRegExp, classRegExp, el, eventRegExp, iterationRegExp, iterator, node, parseNode, skipNodes, _i, _len, _ref, _results,
         _this = this;
       this.bindings = [];
       skipNodes = [];
       iterator = null;
       bindingRegExp = this.bindingRegExp();
       eventRegExp = /^on-/;
+      classRegExp = /^class-/;
       iterationRegExp = /^each-/;
       parseNode = function(node) {
         var a, attribute, binding, context, ctx, dependencies, keypath, model, n, options, path, pipe, pipes, splitPath, type, _i, _j, _k, _l, _len, _len1, _len2, _len3, _ref, _ref1, _ref2, _results;
@@ -230,6 +233,10 @@
                   type = type.replace(eventRegExp, '');
                   options.special = "event";
                 }
+                if (classRegExp.test(type)) {
+                  type = type.replace(classRegExp, '');
+                  options.special = "class";
+                }
                 if (iterationRegExp.test(type)) {
                   type = type.replace(iterationRegExp, '');
                   options.special = "iteration";
@@ -335,6 +342,17 @@
     };
   };
 
+  classBinding = function(name) {
+    return function(el, value) {
+      var elClass, hasClass;
+      elClass = " " + el.className + " ";
+      hasClass = elClass.indexOf(" " + name + " ") !== -1;
+      if (!value === hasClass) {
+        return el.className = value ? "" + el.className + " " + name : elClass.replace(" " + name + " ", " ").trim();
+      }
+    };
+  };
+
   iterationBinding = function(name) {
     return function(el, collection, binding) {
       var data, item, itemEl, iteration, m, n, previous, _i, _j, _len, _len1, _ref, _ref1, _results;

 {
   "name" : "rivets",
   "description" : "Declarative data binding facility.",
-  "version" : "0.3.2",
+  "version" : "0.3.3",
   "author" : "Michael Richards",
   "url" : "http://rivetsjs.com",
   "main" : "./lib/rivets.js",

 #     rivets.js
-#     version : 0.3.2
+#     version : 0.3.3
 #     author : Michael Richards
 #     license : MIT