diff --git a/lib/core/utils/pollyfills.js b/lib/core/utils/pollyfills.js
index d0d876f701..4fb10147f3 100644
--- a/lib/core/utils/pollyfills.js
+++ b/lib/core/utils/pollyfills.js
@@ -30,26 +30,28 @@ if (typeof Object.assign !== 'function') {
 }
 
 if (!Array.prototype.find) {
-  Array.prototype.find = function(predicate) {
-    if (this === null) {
-      throw new TypeError('Array.prototype.find called on null or undefined');
-    }
-    if (typeof predicate !== 'function') {
-      throw new TypeError('predicate must be a function');
-    }
-    var list = Object(this);
-    var length = list.length >>> 0;
-    var thisArg = arguments[1];
-    var value;
-
-    for (var i = 0; i < length; i++) {
-      value = list[i];
-      if (predicate.call(thisArg, value, i, list)) {
-        return value;
+  Object.defineProperty(Array.prototype, "find", {
+    value: function (predicate) {
+      if (this === null) {
+        throw new TypeError('Array.prototype.find called on null or undefined');
+      }
+      if (typeof predicate !== 'function') {
+        throw new TypeError('predicate must be a function');
       }
+      var list = Object(this);
+      var length = list.length >>> 0;
+      var thisArg = arguments[1];
+      var value;
+
+      for (var i = 0; i < length; i++) {
+        value = list[i];
+        if (predicate.call(thisArg, value, i, list)) {
+          return value;
+        }
+      }
+      return undefined;
     }
-    return undefined;
-  };
+  });
 }
 
 
@@ -117,137 +119,143 @@ if (typeof window.addEventListener === 'function') {
 
 
 if (!Array.prototype.includes) {
-  Array.prototype.includes = function(searchElement /*, fromIndex*/ ) {
-    'use strict';
-    var O = Object(this);
-    var len = parseInt(O.length, 10) || 0;
-    if (len === 0) {
-      return false;
-    }
-    var n = parseInt(arguments[1], 10) || 0;
-    var k;
-    if (n >= 0) {
-      k = n;
-    } else {
-      k = len + n;
-      if (k < 0) {k = 0;}
-    }
-    var currentElement;
-    while (k < len) {
-      currentElement = O[k];
-      if (searchElement === currentElement ||
-         (searchElement !== searchElement && currentElement !== currentElement)) { // NaN !== NaN
-        return true;
+  Object.defineProperty(Array.prototype, "includes", {
+    value: function (searchElement) {
+      'use strict';
+      var O = Object(this);
+      var len = parseInt(O.length, 10) || 0;
+      if (len === 0) {
+        return false;
+      }
+      var n = parseInt(arguments[1], 10) || 0;
+      var k;
+      if (n >= 0) {
+        k = n;
+      } else {
+        k = len + n;
+        if (k < 0) { k = 0; }
       }
-      k++;
+      var currentElement;
+      while (k < len) {
+        currentElement = O[k];
+        if (searchElement === currentElement ||
+          (searchElement !== searchElement && currentElement !== currentElement)) { // NaN !== NaN
+          return true;
+        }
+        k++;
+      }
+      return false;
     }
-    return false;
-  };
+  });
 }
 
 // Production steps of ECMA-262, Edition 5, 15.4.4.17
 // Reference: http://es5.github.io/#x15.4.4.17
 if (!Array.prototype.some) {
-  Array.prototype.some = function(fun/*, thisArg*/) {
-    'use strict';
+  Object.defineProperty(Array.prototype, "some", {
+    value: function (fun) {
+      'use strict';
 
-    if (this == null) {
-      throw new TypeError('Array.prototype.some called on null or undefined');
-    }
+      if (this == null) {
+        throw new TypeError('Array.prototype.some called on null or undefined');
+      }
 
-    if (typeof fun !== 'function') {
-      throw new TypeError();
-    }
+      if (typeof fun !== 'function') {
+        throw new TypeError();
+      }
 
-    var t = Object(this);
-    var len = t.length >>> 0;
+      var t = Object(this);
+      var len = t.length >>> 0;
 
-    var thisArg = arguments.length >= 2 ? arguments[1] : void 0;
-    for (var i = 0; i < len; i++) {
-      if (i in t && fun.call(thisArg, t[i], i, t)) {
-        return true;
+      var thisArg = arguments.length >= 2 ? arguments[1] : void 0;
+      for (var i = 0; i < len; i++) {
+        if (i in t && fun.call(thisArg, t[i], i, t)) {
+          return true;
+        }
       }
-    }
 
-    return false;
-  };
+      return false;
+    }
+  });
 }
 
 if (!Array.from) {
-  Array.from = (function () {
-    var toStr = Object.prototype.toString;
-    var isCallable = function (fn) {
-      return typeof fn === 'function' || toStr.call(fn) === '[object Function]';
-    };
-    var toInteger = function (value) {
-      var number = Number(value);
-      if (isNaN(number)) { return 0; }
-      if (number === 0 || !isFinite(number)) { return number; }
-      return (number > 0 ? 1 : -1) * Math.floor(Math.abs(number));
-    };
-    var maxSafeInteger = Math.pow(2, 53) - 1;
-    var toLength = function (value) {
-      var len = toInteger(value);
-      return Math.min(Math.max(len, 0), maxSafeInteger);
-    };
-
-    // The length property of the from method is 1.
-    return function from(arrayLike/*, mapFn, thisArg */) {
-      // 1. Let C be the this value.
-      var C = this;
-
-      // 2. Let items be ToObject(arrayLike).
-      var items = Object(arrayLike);
-
-      // 3. ReturnIfAbrupt(items).
-      if (arrayLike == null) {
-        throw new TypeError("Array.from requires an array-like object - not null or undefined");
-      }
-
-      // 4. If mapfn is undefined, then let mapping be false.
-      var mapFn = arguments.length > 1 ? arguments[1] : void undefined;
-      var T;
-      if (typeof mapFn !== 'undefined') {
-        // 5. else
-        // 5. a If IsCallable(mapfn) is false, throw a TypeError exception.
-        if (!isCallable(mapFn)) {
-          throw new TypeError('Array.from: when provided, the second argument must be a function');
+  Object.defineProperty(Array, "from", {
+    value: function () {
+      var toStr = Object.prototype.toString;
+      var isCallable = function (fn) {
+        return typeof fn === 'function' || toStr.call(fn) === '[object Function]';
+      };
+      var toInteger = function (value) {
+        var number = Number(value);
+        if (isNaN(number)) { return 0; }
+        if (number === 0 || !isFinite(number)) { return number; }
+        return (number > 0 ? 1 : -1) * Math.floor(Math.abs(number));
+      };
+      var maxSafeInteger = Math.pow(2, 53) - 1;
+      var toLength = function (value) {
+        var len = toInteger(value);
+        return Math.min(Math.max(len, 0), maxSafeInteger);
+      };
+
+      // The length property of the from method is 1.
+      return function from(arrayLike/*, mapFn, thisArg */) {
+        // 1. Let C be the this value.
+        var C = this;
+
+        // 2. Let items be ToObject(arrayLike).
+        var items = Object(arrayLike);
+
+        // 3. ReturnIfAbrupt(items).
+        if (arrayLike == null) {
+          throw new TypeError("Array.from requires an array-like object - not null or undefined");
         }
 
-        // 5. b. If thisArg was supplied, let T be thisArg; else let T be undefined.
-        if (arguments.length > 2) {
-          T = arguments[2];
-        }
-      }
-
-      // 10. Let lenValue be Get(items, "length").
-      // 11. Let len be ToLength(lenValue).
-      var len = toLength(items.length);
+        // 4. If mapfn is undefined, then let mapping be false.
+        var mapFn = arguments.length > 1 ? arguments[1] : void undefined;
+        var T;
+        if (typeof mapFn !== 'undefined') {
+          // 5. else
+          // 5. a If IsCallable(mapfn) is false, throw a TypeError exception.
+          if (!isCallable(mapFn)) {
+            throw new TypeError('Array.from: when provided, the second argument must be a function');
+          }
 
-      // 13. If IsConstructor(C) is true, then
-      // 13. a. Let A be the result of calling the [[Construct]] internal method of C with an argument list containing the single item len.
-      // 14. a. Else, Let A be ArrayCreate(len).
-      var A = isCallable(C) ? Object(new C(len)) : new Array(len);
+          // 5. b. If thisArg was supplied, let T be thisArg; else let T be undefined.
+          if (arguments.length > 2) {
+            T = arguments[2];
+          }
+        }
 
-      // 16. Let k be 0.
-      var k = 0;
-      // 17. Repeat, while k < len… (also steps a - h)
-      var kValue;
-      while (k < len) {
-        kValue = items[k];
-        if (mapFn) {
-          A[k] = typeof T === 'undefined' ? mapFn(kValue, k) : mapFn.call(T, kValue, k);
-        } else {
-          A[k] = kValue;
+        // 10. Let lenValue be Get(items, "length").
+        // 11. Let len be ToLength(lenValue).
+        var len = toLength(items.length);
+
+        // 13. If IsConstructor(C) is true, then
+        // 13. a. Let A be the result of calling the [[Construct]] internal method of C with an argument list containing the single item len.
+        // 14. a. Else, Let A be ArrayCreate(len).
+        var A = isCallable(C) ? Object(new C(len)) : new Array(len);
+
+        // 16. Let k be 0.
+        var k = 0;
+        // 17. Repeat, while k < len… (also steps a - h)
+        var kValue;
+        while (k < len) {
+          kValue = items[k];
+          if (mapFn) {
+            A[k] = typeof T === 'undefined' ? mapFn(kValue, k) : mapFn.call(T, kValue, k);
+          } else {
+            A[k] = kValue;
+          }
+          k += 1;
         }
-        k += 1;
-      }
-      // 18. Let putStatus be Put(A, "length", len, true).
-      A.length = len;
-      // 20. Return A.
-      return A;
-    };
-  }());
+        // 18. Let putStatus be Put(A, "length", len, true).
+        A.length = len;
+        // 20. Return A.
+        return A;
+      };
+    }()
+  });
 }
 
 if (!String.prototype.includes) {