diff --git a/app/javascript/src/javascripts/autocomplete.js.erb b/app/javascript/src/javascripts/autocomplete.js.erb
index 5d6a4e7be..11a0fcb33 100644
--- a/app/javascript/src/javascripts/autocomplete.js.erb
+++ b/app/javascript/src/javascripts/autocomplete.js.erb
@@ -246,6 +246,10 @@ Autocomplete.initialize_wiki_autocomplete = function($fields) {
 };
 
 Autocomplete.normal_source = function(term, resp) {
+  if (Utility.is_global_hook_defined("Danbooru.Autocomplete.normal_source")) {
+    return window.Danbooru.Autocomplete.normal_source(term, resp);
+  }
+
   var key = "ac-" + term.replace(/\./g,'\uFFFF');
 
   $.ajax({
@@ -432,6 +436,10 @@ Autocomplete.static_metatag_source = function(term, resp, metatag) {
 }
 
 Autocomplete.user_source = function(term, resp, metatag) {
+  if (Utility.is_global_hook_defined("Danbooru.Autocomplete.user_source")) {
+    return window.Danbooru.Autocomplete.user_source(term, resp, metatag);
+  }
+
   $.ajax({
     url: "/users.json",
     data: {
@@ -466,6 +474,10 @@ Autocomplete.user_source = function(term, resp, metatag) {
 }
 
 Autocomplete.pool_source = function(term, resp, metatag) {
+  if (Utility.is_global_hook_defined("Danbooru.Autocomplete.pool_source")) {
+    return window.Danbooru.Autocomplete.pool_source(term, resp, metatag);
+  }
+
   $.ajax({
     url: "/pools.json",
     data: {
@@ -489,6 +501,10 @@ Autocomplete.pool_source = function(term, resp, metatag) {
 }
 
 Autocomplete.favorite_group_source = function(term, resp, metatag) {
+  if (Utility.is_global_hook_defined("Danbooru.Autocomplete.favorite_group_source")) {
+    return window.Danbooru.Autocomplete.favorite_group_source(term, resp, metatag);
+  }
+
   $.ajax({
     url: "/favorite_groups.json",
     data: {
@@ -509,6 +525,10 @@ Autocomplete.favorite_group_source = function(term, resp, metatag) {
 }
 
 Autocomplete.saved_search_source = function(term, resp) {
+  if (Utility.is_global_hook_defined("Danbooru.Autocomplete.saved_search_source")) {
+    return window.Danbooru.Autocomplete.saved_search_source(term, resp);
+  }
+
   return SavedSearch.labels(term).then(function(labels) {
     resp(labels.map(function(label) {
       return {
diff --git a/app/javascript/src/javascripts/utility.js b/app/javascript/src/javascripts/utility.js
index 14a9d586d..8dcd85a6e 100644
--- a/app/javascript/src/javascripts/utility.js
+++ b/app/javascript/src/javascripts/utility.js
@@ -138,6 +138,18 @@ Utility.sorttable = function(table) {
   });
 };
 
+Utility.is_global_hook_defined = function(path) {
+  let objs = path.split(/\./g);
+  let obj = window;
+  objs.forEach(x => {
+    if (obj) {
+      obj = obj[x]
+    }
+  });
+
+  return typeof obj === 'function';
+}
+
 String.prototype.hash = function() {
   var hash = 5381, i = this.length;
 
diff --git a/app/views/layouts/default.html.erb b/app/views/layouts/default.html.erb
index 721f3398d..37a37740c 100644
--- a/app/views/layouts/default.html.erb
+++ b/app/views/layouts/default.html.erb
@@ -72,15 +72,16 @@
   </script>
   <script defer src="https://use.fontawesome.com/releases/v5.0.10/js/all.js" integrity="sha384-slN8GvtUJGnv6ca26v8EzVaR9DC58QEwsIk9q1QXdCU8Yu8ck/tL/5szYlBbqmS+" crossorigin="anonymous"></script>
   <script>
-    window.Danbooru = {
-      notice: function(msg) {
-        console.warn("Danbooru.notice will be deprecated. Use $(window).trigger('danbooru:notice', msg) instead.")
-        $(window).trigger("danbooru:notice", msg);
-      },
-      error: function(msg) {
-        console.warn("Danbooru.error will be deprecated. Use $(window).trigger('danbooru:error', msg) instead.")
-        $(window).trigger("danbooru:error", msg);
-      }
+    if (typeof window.Danbooru !== "object") {
+      window.Danbooru = {};
+    }
+    window.Danbooru.notice = function(msg) {
+      console.warn("Danbooru.notice will be deprecated. Use $(window).trigger('danbooru:notice', msg) instead.")
+      $(window).trigger("danbooru:notice", msg);
+    }
+    window.Danbooru.error = function(msg) {
+      console.warn("Danbooru.error will be deprecated. Use $(window).trigger('danbooru:error', msg) instead.")
+      $(window).trigger("danbooru:error", msg);
     }
   </script>