diff --git a/app/assets/javascripts/error_templates.js b/app/assets/javascripts/error_templates.js
index 3cb7dcaf..d98840a7 100644
--- a/app/assets/javascripts/error_templates.js
+++ b/app/assets/javascripts/error_templates.js
@@ -1,7 +1,8 @@
 $(document).on('turbolinks:load', function() {
     if ($.isController('error_templates')) {
-        $('#add-attribute').find('button').on('click', function () {
-            $.ajax('//' + location.host + location.pathname + '/attribute.json', {
+        const button = $('#add-attribute').find('button')
+        button.on('click', function () {
+            $.ajax(Routes.attribute_error_template_path(button.data('template-id')), {
                 method: 'POST',
                 data: {
                     _method: 'PUT',
@@ -15,4 +16,4 @@ $(document).on('turbolinks:load', function() {
             });
         });
     }
-});
\ No newline at end of file
+});
diff --git a/app/assets/javascripts/exercise_collections.js.erb b/app/assets/javascripts/exercise_collections.js.erb
index 38e2fb13..c5930fb5 100644
--- a/app/assets/javascripts/exercise_collections.js.erb
+++ b/app/assets/javascripts/exercise_collections.js.erb
@@ -100,7 +100,7 @@ $(document).on('turbolinks:load', function() {
           tooltip.style("display", "none");
         })
         .on("click", function (_event, d) {
-          Turbolinks.visit("/exercises/" + d.exercise_id + "/statistics");
+          Turbolinks.visit(Routes.statistics_exercise_path(d.exercise_id));
         })
         .attr("x", function (d) {
           return x(d.index);
diff --git a/app/assets/javascripts/external_users.js b/app/assets/javascripts/external_users.js
index 402c5473..f97436e3 100644
--- a/app/assets/javascripts/external_users.js
+++ b/app/assets/javascripts/external_users.js
@@ -1,13 +1,14 @@
 $(document).on('turbolinks:load', function() {
-  var grid = $('#tag-grid');
+  const grid = $('#tag-grid');
 
   if ($.isController('external_users') && grid.isPresent()) {
-    var spinner = $('#loading');
-    var noElements = $('#no-elements');
+    const spinner = $('#loading');
+    const user_id = spinner.data('user-id');
+    const noElements = $('#no-elements');
 
-    var buildTagContainer = function(tag) {
+    const buildTagContainer = function(tag) {
       return '\
-        <a href="' + location.href +'/statistics?tag=' + tag.id + '">\
+        <a href="' + Routes.statistics_external_user_path(user_id, {tag: tag.id}) + '">\
           <div class="tag">\
             <div class="name">' + tag.key + '</div>\
             <div class="progress">\
@@ -17,7 +18,7 @@ $(document).on('turbolinks:load', function() {
         </a>';
     };
 
-    var jqxhr = $.ajax('//' + location.host + location.pathname + '/tag_statistics', {
+    const jqxhr = $.ajax(Routes.tag_statistics_external_user_path(user_id), {
       dataType: 'json',
       method: 'GET'
     });
@@ -26,7 +27,7 @@ $(document).on('turbolinks:load', function() {
       if (response.length === 0) {
         noElements.show();
       } else {
-        var elements = response.map(buildTagContainer);
+        const elements = response.map(buildTagContainer);
         grid.append(elements);
       }
     });
diff --git a/app/assets/javascripts/statistics_activity_history.js b/app/assets/javascripts/statistics_activity_history.js
index c4f03e5b..7126d428 100644
--- a/app/assets/javascripts/statistics_activity_history.js
+++ b/app/assets/javascripts/statistics_activity_history.js
@@ -49,7 +49,7 @@ $(document).on('turbolinks:load', function() {
 
       var refreshData = function (callback) {
         var params = new URLSearchParams(window.location.search.slice(1));
-        var jqxhr = $.ajax('/statistics/graphs/' + prefix + '-activity-history.json', {
+        var jqxhr = $.ajax(Routes[`statistics_graphs_${prefix}_activity_history_path`](), {
           dataType: 'json',
           data: {from: params.get('from'), to: params.get('to'), interval: params.get('interval')},
           method: 'GET'
diff --git a/app/assets/javascripts/statistics_graphs.js b/app/assets/javascripts/statistics_graphs.js
index 8caabe1a..bda79fa6 100644
--- a/app/assets/javascripts/statistics_graphs.js
+++ b/app/assets/javascripts/statistics_graphs.js
@@ -101,7 +101,7 @@ $(document).on('turbolinks:load', function() {
       });
     }
 
-    manageGraph('user-activity', '/statistics/graphs/user-activity', 10);
-    manageGraph('rfc-activity', '/statistics/graphs/rfc-activity', 30);
+    manageGraph('user-activity', Routes.statistics_graphs_user_activity_path(), 10);
+    manageGraph('rfc-activity', Routes.statistics_graphs_rfc_activity_path(), 30);
   }
 });
diff --git a/app/views/error_templates/show.html.slim b/app/views/error_templates/show.html.slim
index 19903fd8..66864c9a 100644
--- a/app/views/error_templates/show.html.slim
+++ b/app/views/error_templates/show.html.slim
@@ -41,4 +41,4 @@ h2.mt-4
   = collection_select({}, :error_template_attribute_id,
           ErrorTemplateAttribute.where.not(id: @error_template.error_template_attributes.select(:id).to_a).order('important DESC', :key),
           :id, :key, {include_blank: false}, class: '')
-  button.btn.btn-outline-primary = t('error_templates.add_attribute')
+  button.btn.btn-outline-primary data-template-id=@error_template.id = t('error_templates.add_attribute')
diff --git a/app/views/external_users/show.html.slim b/app/views/external_users/show.html.slim
index e956256b..6477fa25 100644
--- a/app/views/external_users/show.html.slim
+++ b/app/views/external_users/show.html.slim
@@ -12,7 +12,7 @@ h4.mt-4 = link_to(t('.exercise_statistics'), statistics_external_user_path(@user
 
 - if current_user.admin?
   h4.mt-4 = t('.tag_statistics')
-  #loading
+  #loading data-user-id=@user.id
     .spinner
     = t('.loading_tag_statistics')
   #no-elements
diff --git a/app/views/request_for_comments/show.html.slim b/app/views/request_for_comments/show.html.slim
index c25d8ab6..890d371c 100644
--- a/app/views/request_for_comments/show.html.slim
+++ b/app/views/request_for_comments/show.html.slim
@@ -109,7 +109,7 @@ javascript:
     $.ajax({
       dataType: 'json',
       method: 'GET',
-      url: '//' + location.host + location.pathname + '/mark_as_solved'
+      url: '#{ mark_as_solved_request_for_comment_path(@request_for_comment) }'
     }).done(function(response){
       if(response.solved){
         solvedButton.removeClass('btn-primary');
@@ -127,7 +127,7 @@ javascript:
       $.ajax({
         dataType: 'json',
         method: 'POST',
-        url: '//' + location.host + location.pathname + '/set_thank_you_note',
+        url: '#{ set_thank_you_note_request_for_comment_path(@request_for_comment) }',
         data: {
             note: value
         }