Set Product options by checking item id

Author: nit-it

app/code/Magento/ConfigurableProduct/view/frontend/web/js/options-updater.js

@@ -7,10 +7,12 @@ define([
 
     var selectors = {
         formSelector: '#product_addtocart_form',
-        productIdSelector: '#product_addtocart_form [name="product"]'
+        productIdSelector: '#product_addtocart_form [name="product"]',
+        itemIdSelector:'#product_addtocart_form [name="item"]'
     },
     cartData = customerData.get('cart'),
     productId = $(selectors.productIdSelector).val(),
+    itemId= $(selectors.itemIdSelector).val(),
 
     /**
     * set productOptions according to cart data from customer-data
@@ -24,8 +26,10 @@ define([
         if (!(data && data.items && data.items.length && productId)) {
             return false;
         }
-        changedProductOptions = _.find(data.items, function (item) {
-            return item['product_id'] === productId;
+        changedProductOptions = data.items.find(function (item) {
+            if (item['item_id'] == itemId) {
+                return item['product_id'] === productId;
+            }
         });
         changedProductOptions = changedProductOptions && changedProductOptions.options &&
             changedProductOptions.options.reduce(function (obj, val) {