MC-42249: No form validation for negative quantity on bundle products

- Fixed the issue for php 7.3 version.

Author: devarul

app/code/Magento/Bundle/view/base/web/js/price-bundle.js

@@ -107,12 +107,13 @@ define([
                 changes = defaultGetOptionValue(bundleOption, this.options.optionConfig);//eslint-disable-line
             }
 
-            if (changes) {
-                priceBox.trigger('updatePrice', changes);
+            if(checkIsValidateQty(bundleOption.data('qtyField'))) {
+                if (changes) {
+                    priceBox.trigger('updatePrice', changes);
+                }
+                this._displayTierPriceBlock(bundleOption);
+                this.updateProductSummary();
             }
-
-            this._displayTierPriceBlock(bundleOption);
-            this.updateProductSummary();
         },
 
         /**
@@ -131,12 +132,7 @@ define([
                     .options[field.data('optionId')]
                     .selections[field.data('optionValueId')];
                 optionConfig.qty = field.val();
-
-                if (field.val() >= field.data('validate')['validate-item-quantity'].minAllowed &&
-                    field.val() <= field.data('validate')['validate-item-quantity'].maxAllowed
-                ) {
-                    optionInstance.trigger('change');
-                }
+                optionInstance.trigger('change');
             }
         },
 
@@ -377,6 +373,16 @@ define([
         return changes;
     }
 
+    function checkIsValidateQty(qtyElem) {
+        var isValid = 0;
+        if (qtyElem.val() >= qtyElem.data('validate')['validate-item-quantity'].minAllowed &&
+            qtyElem.val() <= qtyElem.data('validate')['validate-item-quantity'].maxAllowed
+        ) {
+            isValid = 1;
+        }
+        return isValid;
+    }
+
     /**
      * Helper to toggle qty field
      * @param {jQuery} element
@@ -455,4 +461,4 @@ define([
 
         return oneItemPrice;
     }
-});
+});