STRF-4803 - adding helper function to remove empty files for safari j…

…query ajax bug

assets/js/theme/common/product-details.js

@@ -56,6 +56,29 @@ export default class ProductDetails {
         this.previewModal = modalFactory('#previewModal')[0];
     }
 
+    /**
+     * https://stackoverflow.com/questions/49672992/ajax-request-fails-when-sending-formdata-including-empty-file-input-in-safari
+     * Safari browser with jquery 3.3.1 has an issue uploading empty file parameters. This function removes any empty files from the form params
+     * @param form: FormData object
+     * @returns FormData object
+     */
+    filterEmptyFilesFromForm(form) {
+        try {
+            for (const pair of form.entries()) {
+                const key = pair[0];
+                const val = pair[1];
+                if (val instanceof File) {
+                    if (val.name === '' && val.size === 0) {
+                        form.delete(key);
+                    }
+                }
+            }
+        } catch (e) {
+            console.error(e);
+        }
+        return form;
+    }
+
     /**
      * Since $productView can be dynamically inserted using render_with,
      * We have to retrieve the respective elements
@@ -234,7 +257,7 @@ export default class ProductDetails {
         this.$overlay.show();
 
         // Add item to cart
-        utils.api.cart.itemAdd(new FormData(form), (err, response) => {
+        utils.api.cart.itemAdd(this.filterEmptyFilesFromForm(new FormData(form)), (err, response) => {
             const errorMessage = err || response.data.error;
 
             $addToCartBtn