Izmjenjena struktura, dodan backand

web/node_modules/core-js/modules/$.array-includes.js

@@ -0,0 +1,21 @@
+// false -> Array#indexOf
+// true  -> Array#includes
+var toIObject = require('./$.to-iobject')
+  , toLength  = require('./$.to-length')
+  , toIndex   = require('./$.to-index');
+module.exports = function(IS_INCLUDES){
+  return function($this, el, fromIndex){
+    var O      = toIObject($this)
+      , length = toLength(O.length)
+      , index  = toIndex(fromIndex, length)
+      , value;
+    // Array#includes uses SameValueZero equality algorithm
+    if(IS_INCLUDES && el != el)while(length > index){
+      value = O[index++];
+      if(value != value)return true;
+    // Array#toIndex ignores holes, Array#includes - not
+    } else for(;length > index; index++)if(IS_INCLUDES || index in O){
+      if(O[index] === el)return IS_INCLUDES || index;
+    } return !IS_INCLUDES && -1;
+  };
+};