allow json in search response and abstract interactive loading from select2

Resources/public/modules/select_interactive_loading/index.js

@@ -0,0 +1,36 @@
+
+window.addEventListener('load', function (e) {
+    var
+            postalCodes = document.querySelectorAll('[data-select-interactive-loading]')
+            ;
+
+    for (let i = 0; i < postalCodes.length; i++) {
+        let
+            searchUrl = postalCodes[i].dataset.searchUrl,
+            noResultsLabel = postalCodes[i].dataset.noResultsLabel,
+            errorLoadLabel = postalCodes[i].dataset.errorLoadLabel,
+            searchingLabel  = postalCodes[i].dataset.searchingLabel
+            ;
+        
+
+        $(postalCodes[i]).select2({
+            allowClear: true,
+            language: {
+                errorLoading: function () {
+                    return errorLoadLabel;
+                },
+                noResults: function () {
+                    return noResultsLabel;
+                },
+                searching: function () {
+                    return searchingLabel;
+                }
+            },
+            ajax: {
+                url: searchUrl,
+                dataType: 'json',
+                delay: 250
+            }
+        });
+    }
+});