diff --git a/.eslintrc.js b/.eslintrc.js
index 218f5609..f33aca09 100644
--- a/.eslintrc.js
+++ b/.eslintrc.js
@@ -50,13 +50,14 @@ module.exports = {
     globals: {
         //script.js
         gradioApp: "readonly",
+        executeCallbacks: "readonly",
+        onAfterUiUpdate: "readonly",
+        onOptionsChanged: "readonly",
         onUiLoaded: "readonly",
         onUiUpdate: "readonly",
-        onOptionsChanged: "readonly",
         uiCurrentTab: "writable",
-        uiElementIsVisible: "readonly",
         uiElementInSight: "readonly",
-        executeCallbacks: "readonly",
+        uiElementIsVisible: "readonly",
         //ui.js
         opts: "writable",
         all_gallery_buttons: "readonly",
diff --git a/javascript/aspectRatioOverlay.js b/javascript/aspectRatioOverlay.js
index 1c08a1a9..2cf2d571 100644
--- a/javascript/aspectRatioOverlay.js
+++ b/javascript/aspectRatioOverlay.js
@@ -81,7 +81,7 @@ function dimensionChange(e, is_width, is_height) {
 }
 
 
-onUiUpdate(function() {
+onAfterUiUpdate(function() {
     var arPreviewRect = gradioApp().querySelector('#imageARPreview');
     if (arPreviewRect) {
         arPreviewRect.style.display = 'none';
diff --git a/javascript/contextMenus.js b/javascript/contextMenus.js
index f14af1d4..d60a10c4 100644
--- a/javascript/contextMenus.js
+++ b/javascript/contextMenus.js
@@ -167,6 +167,4 @@ var addContextMenuEventListener = initResponse[2];
 })();
 //End example Context Menu Items
 
-onUiUpdate(function() {
-    addContextMenuEventListener();
-});
+onAfterUiUpdate(addContextMenuEventListener);
diff --git a/javascript/generationParams.js b/javascript/generationParams.js
index a877f8a5..7c0fd221 100644
--- a/javascript/generationParams.js
+++ b/javascript/generationParams.js
@@ -1,7 +1,7 @@
 // attaches listeners to the txt2img and img2img galleries to update displayed generation param text when the image changes
 
 let txt2img_gallery, img2img_gallery, modal = undefined;
-onUiUpdate(function() {
+onAfterUiUpdate(function() {
     if (!txt2img_gallery) {
         txt2img_gallery = attachGalleryListeners("txt2img");
     }
diff --git a/javascript/imageMaskFix.js b/javascript/imageMaskFix.js
index 3c9b8a6f..900c56f3 100644
--- a/javascript/imageMaskFix.js
+++ b/javascript/imageMaskFix.js
@@ -39,5 +39,5 @@ function imageMaskResize() {
     });
 }
 
-onUiUpdate(imageMaskResize);
+onAfterUiUpdate(imageMaskResize);
 window.addEventListener('resize', imageMaskResize);
diff --git a/javascript/imageviewer.js b/javascript/imageviewer.js
index 78e24eb9..677e95c1 100644
--- a/javascript/imageviewer.js
+++ b/javascript/imageviewer.js
@@ -170,7 +170,7 @@ function modalTileImageToggle(event) {
     event.stopPropagation();
 }
 
-onUiUpdate(function() {
+onAfterUiUpdate(function() {
     var fullImg_preview = gradioApp().querySelectorAll('.gradio-gallery > div > img');
     if (fullImg_preview != null) {
         fullImg_preview.forEach(setupImageForLightbox);
diff --git a/javascript/notification.js b/javascript/notification.js
index a68a76f2..76c5715d 100644
--- a/javascript/notification.js
+++ b/javascript/notification.js
@@ -4,7 +4,7 @@ let lastHeadImg = null;
 
 let notificationButton = null;
 
-onUiUpdate(function() {
+onAfterUiUpdate(function() {
     if (notificationButton == null) {
         notificationButton = gradioApp().getElementById('request_notifications');
 
diff --git a/javascript/ui.js b/javascript/ui.js
index 800a2ae6..d70a681b 100644
--- a/javascript/ui.js
+++ b/javascript/ui.js
@@ -249,7 +249,7 @@ function confirm_clear_prompt(prompt, negative_prompt) {
 
 
 var opts = {};
-onUiUpdate(function() {
+onAfterUiUpdate(function() {
     if (Object.keys(opts).length != 0) return;
 
     var json_elem = gradioApp().getElementById('settings_json');
diff --git a/script.js b/script.js
index f7612779..de9d7e22 100644
--- a/script.js
+++ b/script.js
@@ -19,35 +19,79 @@ function get_uiCurrentTabContent() {
 }
 
 var uiUpdateCallbacks = [];
+var uiAfterUpdateCallbacks = [];
 var uiLoadedCallbacks = [];
 var uiTabChangeCallbacks = [];
 var optionsChangedCallbacks = [];
+var uiAfterUpdateTimeout = null;
 var uiCurrentTab = null;
 
+/**
+ * Register callback to be called at each UI update.
+ * The callback receives an array of MutationRecords as an argument.
+ */
 function onUiUpdate(callback) {
     uiUpdateCallbacks.push(callback);
 }
+
+/**
+ * Register callback to be called soon after UI updates.
+ * The callback receives no arguments.
+ *
+ * This is preferred over `onUiUpdate` if you don't need
+ * access to the MutationRecords, as your function will
+ * not be called quite as often.
+ */
+function onAfterUiUpdate(callback) {
+    uiAfterUpdateCallbacks.push(callback);
+}
+
+/**
+ * Register callback to be called when the UI is loaded.
+ * The callback receives no arguments.
+ */
 function onUiLoaded(callback) {
     uiLoadedCallbacks.push(callback);
 }
+
+/**
+ * Register callback to be called when the UI tab is changed.
+ * The callback receives no arguments.
+ */
 function onUiTabChange(callback) {
     uiTabChangeCallbacks.push(callback);
 }
+
+/**
+ * Register callback to be called when the options are changed.
+ * The callback receives no arguments.
+ * @param callback
+ */
 function onOptionsChanged(callback) {
     optionsChangedCallbacks.push(callback);
 }
 
-function runCallback(x, m) {
-    try {
-        x(m);
-    } catch (e) {
-        (console.error || console.log).call(console, e.message, e);
+function executeCallbacks(queue, arg) {
+    for (const callback of queue) {
+        try {
+            callback(arg);
+        } catch (e) {
+            console.error("error running callback", callback, ":", e);
+        }
     }
 }
-function executeCallbacks(queue, m) {
-    queue.forEach(function(x) {
-        runCallback(x, m);
-    });
+
+/**
+ * Schedule the execution of the callbacks registered with onAfterUiUpdate.
+ * The callbacks are executed after a short while, unless another call to this function
+ * is made before that time. IOW, the callbacks are executed only once, even
+ * when there are multiple mutations observed.
+ */
+function scheduleAfterUiUpdateCallbacks() {
+    clearTimeout(uiAfterUpdateTimeout);
+    uiAfterUpdateTimeout = setTimeout(function() {
+        executeCallbacks(uiAfterUpdateCallbacks);
+    }, 200);
 }
 
 var executedOnLoaded = false;
@@ -60,6 +104,7 @@ document.addEventListener("DOMContentLoaded", function() {
         }
 
         executeCallbacks(uiUpdateCallbacks, m);
+        scheduleAfterUiUpdateCallbacks();
         const newTab = get_uiCurrentTab();
         if (newTab && (newTab !== uiCurrentTab)) {
             uiCurrentTab = newTab;