Enable `forin` and `freeze` rules.

js/.jshintrc

@@ -7,6 +7,8 @@
   "eqeqeq"    : true,
   "eqnull"    : true,
   "expr"      : true,
+  "forin"     : true,
+  "freeze"    : true,
   "indent"    : 2,
   "laxbreak"  : true,
   "nonbsp"    : true,

js/push.js

@@ -177,6 +177,7 @@
     if (transitionFromObj.transition) {
       activeObj = extendWithDom(activeObj, '.content', activeDom.cloneNode(true));
       for (key in bars) {
+        if (bars.hasOwnProperty(key)) {
           barElement = document.querySelector(bars[key]);
           if (activeObj[key]) {
             swapContent(activeObj[key], barElement);
@@ -185,6 +186,7 @@
           }
         }
       }
+    }
 
     swapContent(
       (activeObj.contents || activeDom).cloneNode(true),
@@ -208,8 +210,10 @@
     options.container = options.container || options.transition ? document.querySelector('.content') : document.body;
 
     for (key in bars) {
+      if (bars.hasOwnProperty(key)) {
         options[key] = options[key] || document.querySelector(bars[key]);
       }
+    }
 
     if (xhr && xhr.readyState < 4) {
       xhr.onreadystatechange = noop;
@@ -269,6 +273,7 @@
 
     if (options.transition) {
       for (key in bars) {
+        if (bars.hasOwnProperty(key)) {
           barElement = document.querySelector(bars[key]);
           if (data[key]) {
             swapContent(data[key], barElement);
@@ -277,6 +282,7 @@
           }
         }
       }
+    }
 
     swapContent(data.contents, options.container, options.transition, function () {
       cacheReplace({
@@ -408,8 +414,10 @@
     var result = {};
 
     for (i in obj) {
+      if (obj.hasOwnProperty(i)) {
         result[i] = obj[i];
       }
+    }
 
     Object.keys(bars).forEach(function (key) {
       var el = dom.querySelector(bars[key]);