diff --git a/src/gui/html/index.html b/src/gui/html/index.html
index 61054f55..0198677d 100644
--- a/src/gui/html/index.html
+++ b/src/gui/html/index.html
@@ -477,7 +477,6 @@
   <script src="js/dom.js"></script>
   <script src="js/events.js"></script>
   <script src="js/game.js"></script>
-  <script src="js/helpers.js"></script>
   <script src="js/translateStaticText.js"></script>
   <script src="js/plugin.js"></script>
   <script src="js/query.js"></script>
diff --git a/src/gui/html/js/events.js b/src/gui/html/js/events.js
index d0083196..6d411da9 100644
--- a/src/gui/html/js/events.js
+++ b/src/gui/html/js/events.js
@@ -6,7 +6,7 @@ function onSidebarFilterToggle(evt) {
   } else {
     loot.filters.contentSearchString = evt.target.value;
   }
-  filterPluginData(loot.game.plugins, loot.filters);
+  loot.filters.apply(loot.game.plugins);
 }
 function onJumpToGeneralInfo() {
   document.getElementById('pluginCardList').scroll(0, 0);
@@ -38,7 +38,7 @@ function onChangeGame(evt) {
     loot.Filters.fillConflictsFilterList(loot.game.plugins);
 
     /* Now update virtual lists. */
-    filterPluginData(loot.game.plugins, loot.filters);
+    loot.filters.apply(loot.game.plugins);
 
     loot.Dialog.closeProgress();
   }).catch(loot.handlePromiseError);
@@ -74,7 +74,7 @@ function onUpdateMasterlist() {
 function onSortPlugins() {
   if (loot.filters.deactivateConflictsFilter()) {
     /* Conflicts filter was undone, update the displayed cards. */
-    filterPluginData(loot.game.plugins, loot.filters);
+    loot.filters.apply(loot.game.plugins);
   }
 
   let promise = Promise.resolve();
@@ -129,7 +129,7 @@ function onSortPlugins() {
 
     /* Now update the UI for the new order. */
     loot.game.plugins = loot.game.loadOrder;
-    filterPluginData(loot.game.plugins, loot.filters);
+    loot.filters.apply(loot.game.plugins);
 
     loot.state.enterSortingState();
 
@@ -150,7 +150,7 @@ function onCancelSort() {
   return loot.query('cancelSort').then(JSON.parse).then((messages) => {
     /* Sort UI elements again according to stored old load order. */
     loot.game.plugins = loot.game.oldLoadOrder;
-    filterPluginData(loot.game.plugins, loot.filters);
+    loot.filters.apply(loot.game.plugins);
     delete loot.game.loadOrder;
     delete loot.game.oldLoadOrder;
 
@@ -238,7 +238,7 @@ function onContentRefresh() {
     loot.Filters.fillConflictsFilterList(loot.game.plugins);
 
     /* Reapply filters. */
-    filterPluginData(loot.game.plugins, loot.filters);
+    loot.filters.apply(loot.game.plugins);
 
     loot.Dialog.closeProgress();
   }).catch(loot.handlePromiseError);
@@ -421,12 +421,12 @@ function onConflictsFilter(evt) {
           gamePlugin.update(plugin);
         }
       });
-      filterPluginData(loot.game.plugins, loot.filters);
+      loot.filters.apply(loot.game.plugins);
       loot.Dialog.closeProgress();
     }).catch(loot.handlePromiseError);
   } else {
     loot.filters.deactivateConflictsFilter();
-    filterPluginData(loot.game.plugins, loot.filters);
+    loot.filters.apply(loot.game.plugins);
   }
 }
 function onCopyMetadata(evt) {
diff --git a/src/gui/html/js/filters.js b/src/gui/html/js/filters.js
index 40c5609b..f3f2b391 100644
--- a/src/gui/html/js/filters.js
+++ b/src/gui/html/js/filters.js
@@ -97,6 +97,32 @@
     }).catch(handlePromiseError);
   }
 
+  apply(plugins) {
+    const filteredPlugins = plugins.filter(this.pluginFilter, this);
+
+    document.getElementById('cardsNav').items = filteredPlugins;
+    document.getElementById('pluginCardList').items = filteredPlugins;
+
+    const pluginCards = document.getElementById('pluginCardList').children;
+    for (let i = 0; i < pluginCards.length; ++i) {
+      if (pluginCards[i].data) {
+        pluginCards[i].updateContent(true);
+      }
+    }
+    document.getElementById('cardsNav').notifyResize();
+    document.getElementById('pluginCardList').notifyResize();
+
+    /* Now perform search again. If there is no current search, this won't
+       do anything. */
+    document.getElementById('searchBar').search();
+
+    /* Re-count all hidden plugins and messages. */
+    document.getElementById('hiddenPluginNo').textContent = plugins.length - filteredPlugins.length;
+    document.getElementById('hiddenMessageNo').textContent = plugins.reduce((previousValue, currentValue) => (
+      previousValue + currentValue.messages.length - currentValue.getCardContent(this).messages.length
+    ), 0);
+  }
+
   static fillConflictsFilterList(plugins) {
     const list = document.getElementById('conflictsFilter');
 
diff --git a/src/gui/html/js/helpers.js b/src/gui/html/js/helpers.js
deleted file mode 100644
index 0e1012e8..00000000
--- a/src/gui/html/js/helpers.js
+++ /dev/null
@@ -1,28 +0,0 @@
-'use strict';
-function filterPluginData(plugins, filters) {
-  const filteredPlugins = plugins.filter(filters.pluginFilter, filters);
-
-  document.getElementById('cardsNav').items = filteredPlugins;
-  document.getElementById('pluginCardList').items = filteredPlugins;
-
-  const pluginCards = document.getElementById('pluginCardList').children;
-  for (let i = 0; i < pluginCards.length; ++i) {
-    if (pluginCards[i].data) {
-      pluginCards[i].updateContent(true);
-    }
-  }
-  document.getElementById('cardsNav').notifyResize();
-  document.getElementById('pluginCardList').notifyResize();
-
-  /* Now perform search again. If there is no current search, this won't
-     do anything. */
-  document.getElementById('searchBar').search();
-
-  /* Re-count all hidden plugins and messages. */
-  document.getElementById('hiddenPluginNo').textContent = plugins.length - filteredPlugins.length;
-  let hiddenMessageNo = 0;
-  plugins.forEach((plugin) => {
-    hiddenMessageNo += plugin.messages.length - plugin.getCardContent(filters).messages.length;
-  });
-  document.getElementById('hiddenMessageNo').textContent = hiddenMessageNo;
-}
diff --git a/src/gui/html/js/initialise.js b/src/gui/html/js/initialise.js
index 00183792..df97f1db 100644
--- a/src/gui/html/js/initialise.js
+++ b/src/gui/html/js/initialise.js
@@ -134,7 +134,7 @@
         || filters.hideNotes
         || filters.hideDoNotCleanMessages
         || filters.hideAllPluginMessages) {
-      filterPluginData(plugins, filters);
+      filters.apply(plugins);
     }
 
     if (filters.hideVersionNumbers) {