add JS function sendFormSubmissionAjax to reduce duplicate code

app/assets/javascripts/ajax.js

@@ -0,0 +1,9 @@
+function sendFormSubmissionAjax(dataObj, selector) {
+  $.ajax({
+    url: $(selector).attr('action'), // grab the URL from the form itself
+    data: dataObj,
+    success: (event, success) => {
+      $(selector).trigger('ajax:success', event);
+    }
+  });
+}

app/assets/javascripts/application.js

@@ -57,4 +57,5 @@
 //= require keybindings.js
 //= require realtime_username_validation.js
 //= require jquery-validation/dist/jquery.validate.js
-//= require validation.js
+//= require validation.js
+//= require ajax.js

app/assets/javascripts/comment.js

@@ -55,11 +55,6 @@ function insertTitleSuggestionTemplate() {
 // JS API for submitting comments
 function addComment(comment, selector) {
   selector = selector || '.comment-form'; // class instead of id because of the bound function on line 3
-  $.ajax({
-    url: $(selector).attr('action'), // grab the URL from the form itself
-    data: { body: comment },
-    success: (event, success) => {
-      $(selector).trigger('ajax:success', event);
-    }
-  });
+  let data = { body: comment };
+  sendFormSubmissionAjax(data, selector);
 }

app/assets/javascripts/tagging.js

@@ -9,13 +9,8 @@ function addTag(tagname, selector) {
     geo = geocodeStringAndPan(place);
   }
   else {
-    $.ajax({
-      url: $(selector).attr('action'), // grab the URL from the form itself
-      data: { name: tagname },
-      success: (event, success) => {
-        $(selector).trigger('ajax:success', event);
-      }
-    });
+    let data = { name: tagname };
+    sendFormSubmissionAjax(data, selector);
   }
 }
 

config/initializers/assets.rb

@@ -2,6 +2,7 @@
   'leaflet-blurred-location/dist/Leaflet.BlurredLocation.js',
 
   'advanced_search.js',
+  'ajax.js',
   'application.js',
   'comment_expand.js',
   'comment.js',