Master

bower.json

@@ -1,6 +1,6 @@
 {
   "name": "object.observe",
-  "version": "0.2.4",
+  "version": "0.2.6",
   "homepage": "https://github.com/MaxArt2501/object-observe",
   "authors": [
     "Massimo Artizzu <maxart.x@gmail.com>"

changelog.md

@@ -1,3 +1,13 @@
+## v0.2.6
+
+* Apply fix from MaxArt2501 at https://github.com/MaxArt2501/object-observe/pull/17 for #16
+
+## v0.2.5
+
+2015-10-13
+
+* Fixes issue #16
+
 ## v0.2.4
 
 2015-03-31

dist/object-observe-lite.js

@@ -1,5 +1,5 @@
 /*!
- * Object.observe "lite" polyfill - v0.2.4
+ * Object.observe "lite" polyfill - v0.2.6
  * by Massimo Artizzu (MaxArt2501)
  *
  * https://github.com/MaxArt2501/object-observe

dist/object-observe.js

@@ -1,5 +1,5 @@
 /*!
- * Object.observe polyfill - v0.2.4
+ * Object.observe polyfill - v0.2.6
  * by Massimo Artizzu (MaxArt2501)
  *
  * https://github.com/MaxArt2501/object-observe
@@ -246,13 +246,13 @@ Object.observe || (function(O, A, root, _undefined) {
          * @param {Handler} handler
          * @param {String[]} [acceptList]
          */
-        doObserve = function(object, handler, acceptList) {
-
+        doObserve = function (object, handler, acceptList) {
             var data = observed.get(object);
 
-            if (data)
+            if (data) {
+                performPropertyChecks(data, object); // <- fixes #16
                 setHandler(object, data, handler, acceptList);
-            else {
+            } else {
                 data = createObjectData(object);
                 setHandler(object, data, handler, acceptList);
 

package.json

@@ -1,6 +1,6 @@
 {
   "name": "object.observe",
-  "version": "0.2.4",
+  "version": "0.2.6",
   "description": "Object.observe polyfill based on ES7 spec",
   "main": "dist/object-observe.js",
   "directories": {

test/tests.js

@@ -399,6 +399,25 @@ describe("Object.observe", function() {
             } catch (e) { done(e); }
         }, timeout);
     });
+
+    it("should not notify about the changes made before observe called (should be run in IE or Firefox)", function (done) {
+        var obj = {};
+        var callback1 = function () {
+        };
+        var callback2 = function () {
+            done(new Error("this callback should not be called as it was attached after the changes were made "));
+        };
+
+        obj.value1 = "value 1";
+        Object.observe(obj, callback1);
+
+        obj.value2 = "value 2";
+        Object.observe(obj, callback2);
+
+        setTimeout(function () {
+            done();
+        }, 10);
+    });
 });
 
 describe("Object.unobserve", function() {