hide or show the select for regions instead of enabling/disabling in customer registration

Author: UB3RL33T

app/code/Magento/Checkout/view/frontend/web/js/region-updater.js

@@ -157,7 +157,7 @@ define([
                 regionInput = $(this.options.regionInputId),
                 postcode = $(this.options.postcodeId),
                 label = regionList.parent().siblings('label'),
-                requiredLabel = regionList.parents('div.field');
+                container = regionList.parents('div.field');
 
             this._clearError();
             this._checkRegionRequired(country);
@@ -181,15 +181,16 @@ define([
 
                 if (this.options.isRegionRequired) {
                     regionList.addClass('required-entry').removeAttr('disabled');
-                    requiredLabel.addClass('required');
+                    container.addClass('required').show();
                 } else {
                     regionList.removeClass('required-entry validate-select').removeAttr('data-validate');
-                    requiredLabel.removeClass('required');
+                    container.removeClass('required');
 
                     if (!this.options.optionalRegionAllowed) { //eslint-disable-line max-depth
-                        regionList.attr('disabled', 'disabled');
+                        regionList.hide();
+                        container.hide();
                     } else {
-                        regionList.removeAttr('disabled');
+                        regionList.show();
                     }
                 }
 
@@ -201,12 +202,13 @@ define([
 
                 if (this.options.isRegionRequired) {
                     regionInput.addClass('required-entry').removeAttr('disabled');
-                    requiredLabel.addClass('required');
+                    container.addClass('required').show();
                 } else {
                     if (!this.options.optionalRegionAllowed) { //eslint-disable-line max-depth
                         regionInput.attr('disabled', 'disabled');
+                        container.hide();
                     }
-                    requiredLabel.removeClass('required');
+                    container.removeClass('required');
                     regionInput.removeClass('required-entry');
                 }