lib/es5.js in uglifier-2.1.0 vs lib/es5.js in uglifier-2.1.1

@@ -183,5 +183,139 @@
             }
         }
         return -1;
     }
 }
+
+// https://developer.mozilla.org/en/docs/JavaScript/Reference/Global_Objects/Object/keys
+if (!Object.keys) {
+  Object.keys = (function () {
+    var hasOwnProperty = Object.prototype.hasOwnProperty,
+        hasDontEnumBug = !({toString: null}).propertyIsEnumerable('toString'),
+        dontEnums = [
+          'toString',
+          'toLocaleString',
+          'valueOf',
+          'hasOwnProperty',
+          'isPrototypeOf',
+          'propertyIsEnumerable',
+          'constructor'
+        ],
+        dontEnumsLength = dontEnums.length;
+
+    return function (obj) {
+      if (typeof obj !== 'object' && typeof obj !== 'function' || obj === null) throw new TypeError('Object.keys called on non-object');
+
+      var result = [];
+
+      for (var prop in obj) {
+        if (hasOwnProperty.call(obj, prop)) result.push(prop);
+      }
+
+      if (hasDontEnumBug) {
+        for (var i=0; i < dontEnumsLength; i++) {
+          if (hasOwnProperty.call(obj, dontEnums[i])) result.push(dontEnums[i]);
+        }
+      }
+      return result;
+    }
+  })()
+};
+
+// https://developer.mozilla.org/en/docs/JavaScript/Reference/Global_Objects/Object/create
+if (!Object.create) {
+    Object.create = function (o) {
+        if (arguments.length > 1) {
+            throw new Error('Object.create implementation only accepts the first parameter.');
+        }
+        function F() {}
+        F.prototype = o;
+        return new F();
+    };
+}
+
+// https://developer.mozilla.org/en/docs/JavaScript/Reference/Global_Objects/Array/filter
+if (!Array.prototype.filter)
+{
+  Array.prototype.filter = function(fun /*, thisp*/)
+  {
+    "use strict";
+
+    if (this == null)
+      throw new TypeError();
+
+    var t = Object(this);
+    var len = t.length >>> 0;
+    if (typeof fun != "function")
+      throw new TypeError();
+
+    var res = [];
+    var thisp = arguments[1];
+    for (var i = 0; i < len; i++)
+    {
+      if (i in t)
+      {
+        var val = t[i]; // in case fun mutates this
+        if (fun.call(thisp, val, i, t))
+          res.push(val);
+      }
+    }
+
+    return res;
+  };
+}
+
+// https://developer.mozilla.org/en/docs/JavaScript/Reference/Global_Objects/Function/bind
+if (!Function.prototype.bind) {
+  Function.prototype.bind = function (oThis) {
+    if (typeof this !== "function") {
+      // closest thing possible to the ECMAScript 5 internal IsCallable function
+      throw new TypeError("Function.prototype.bind - what is trying to be bound is not callable");
+    }
+
+    var aArgs = Array.prototype.slice.call(arguments, 1),
+        fToBind = this,
+        fNOP = function () {},
+        fBound = function () {
+          return fToBind.apply(this instanceof fNOP && oThis
+                                 ? this
+                                 : oThis,
+                               aArgs.concat(Array.prototype.slice.call(arguments)));
+        };
+
+    fNOP.prototype = this.prototype;
+    fBound.prototype = new fNOP();
+
+    return fBound;
+  };
+}
+
+// https://developer.mozilla.org/en/docs/JavaScript/Reference/Global_Objects/Array/isArray
+if(!Array.isArray) {
+  Array.isArray = function (vArg) {
+    return Object.prototype.toString.call(vArg) === "[object Array]";
+  };
+}
+
+// https://developer.mozilla.org/en/docs/JavaScript/Reference/Global_Objects/String/trim
+if(!String.prototype.trim) {
+  String.prototype.trim = function () {
+    return this.replace(/^\s+|\s+$/g,'');
+  };
+}
+
+
+function definePropertyWorks() {
+  try {
+    Object.defineProperty({}, "property", {});
+    return "property" in object;
+  } catch (exception) {
+    return false;
+  }
+}
+
+if (!definePropertyWorks()) {
+  Object.defineProperty = function defineProperty(object) {
+    // fail silently
+    return object;
+  }
+}