object.is polyfill

Js/core/Object/is/README.md

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+# Object.is()
+
+The Object.is() method determines whether two values are the same value.
+
+```Object.is(value1, value2);```

Js/core/Object/is/object.is.js

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+/**
+ * Object.is()
+ */
+if (!Object.is) {
+    Object.is = function(value1, value2) {
+        // Check -0
+        if(value1 === 0 && value2 === 0) {
+            return 1/value1 === 1/value2;
+        }
+        // Check NaN
+        if(value1 !== value1) {
+            return value2 !== value2;
+        }
+        return value1 === value2;
+    }
+}