EventTarget: set handler for multiple events at once

lib/rsvp.js

@@ -78,10 +78,12 @@ var EventTarget = exports.EventTarget = {
     return object;
   },
 
-  on: function(eventName, callback, binding) {
-    var allCallbacks = callbacksFor(this), callbacks;
+  on: function(eventNames, callback, binding) {
+    var allCallbacks = callbacksFor(this), callbacks, eventName;
+    eventNames = eventNames.split(/\s+/);
     binding = binding || this;
 
+    while (eventName = eventNames.shift()) {
       callbacks = allCallbacks[eventName];
 
       if (!callbacks) {
@@ -91,21 +93,25 @@ var EventTarget = exports.EventTarget = {
       if (indexOf(callbacks, callback) === -1) {
         callbacks.push([callback, binding]);
       }
+    }
   },
 
-  off: function(eventName, callback) {
-    var allCallbacks = callbacksFor(this), callbacks;
+  off: function(eventNames, callback) {
+    var allCallbacks = callbacksFor(this), callbacks, eventName, index;
+    eventNames = eventNames.split(/\s+/);
 
+    while (eventName = eventNames.shift()) {
       if (!callback) {
         allCallbacks[eventName] = [];
-      return;
+        continue;
       }
 
       callbacks = allCallbacks[eventName];
 
-    var index = indexOf(callbacks, callback);
+      index = indexOf(callbacks, callback);
 
       if (index !== -1) { callbacks.splice(index, 1); }
+    }
   },
 
   trigger: function(eventName, options) {