add submitHandler helper function to asyncform util

static/js/utils/asyncForm.js

@@ -12,31 +12,7 @@
     var lastRequestTimestamp = 0;
 
     function setup() {
-      formElement.addEventListener('submit', function(event) {
+      formElement.addEventListener('submit', submitHandler);
-        event.preventDefault();
-
-        formElement.classList.add(ASYNC_FORM_LOADING_CLASS)
-        lastRequestTimestamp = Date.now();
-
-        var url = formElement.getAttribute('action');
-        var headers = { };
-        var body = new FormData(formElement);
-
-        if (options && options.headers) {
-          Object.keys(options.headers).forEach(function(headerKey) {
-            headers[headerKey] = options.headers[headerKey];
-          });
-        }
-
-        window.utils.httpClient.post(url, headers, body)
-          .then(function(response) {
-            return response.json();
-          }).then(function(response) {
-            processResponse(response[0])
-          }).catch(function(error) {
-            console.error('could not fetch or process response from ' + url, { error });
-          });
-      });
     }
 
     function processResponse(response) {
@@ -51,7 +27,32 @@
         parentElement.insertBefore(responseElement, formElement);
         formElement.remove();
       }, delay);
+    }
 
+    function submitHandler(event) {
+      event.preventDefault();
+
+      formElement.classList.add(ASYNC_FORM_LOADING_CLASS)
+      lastRequestTimestamp = Date.now();
+
+      var url = formElement.getAttribute('action');
+      var headers = { };
+      var body = new FormData(formElement);
+
+      if (options && options.headers) {
+        Object.keys(options.headers).forEach(function(headerKey) {
+          headers[headerKey] = options.headers[headerKey];
+        });
+      }
+
+      window.utils.httpClient.post(url, headers, body)
+        .then(function(response) {
+          return response.json();
+        }).then(function(response) {
+          processResponse(response[0])
+        }).catch(function(error) {
+          console.error('could not fetch or process response from ' + url, { error });
+        });
     }
 
     setup();