diff --git a/javascript/contextMenus.js b/javascript/contextMenus.js
index 1f682c74..42f301ab 100644
--- a/javascript/contextMenus.js
+++ b/javascript/contextMenus.js
@@ -4,7 +4,7 @@ contextMenuInit = function(){
   let menuSpecs = new Map();
 
   const uid = function(){
-    return Date.now().toString(36) + Math.random().toString(36).substr(2);
+    return Date.now().toString(36) + Math.random().toString(36).substring(2);
   }
 
   function showContextMenu(event,element,menuEntries){
diff --git a/javascript/extensions.js b/javascript/extensions.js
index cb68344b..2a2d2f8e 100644
--- a/javascript/extensions.js
+++ b/javascript/extensions.js
@@ -5,10 +5,10 @@ function extensions_apply(_disabled_list, _update_list, disable_all){
 
     gradioApp().querySelectorAll('#extensions input[type="checkbox"]').forEach(function(x){
         if(x.name.startsWith("enable_") && ! x.checked)
-            disable.push(x.name.substr(7))
+            disable.push(x.name.substring(7))
 
         if(x.name.startsWith("update_") && x.checked)
-            update.push(x.name.substr(7))
+            update.push(x.name.substring(7))
     })
 
     restart_reload()
@@ -21,7 +21,7 @@ function extensions_check(){
 
     gradioApp().querySelectorAll('#extensions input[type="checkbox"]').forEach(function(x){
         if(x.name.startsWith("enable_") && ! x.checked)
-            disable.push(x.name.substr(7))
+            disable.push(x.name.substring(7))
     })
 
     gradioApp().querySelectorAll('#extensions .extension_status').forEach(function(x){
diff --git a/javascript/ui.js b/javascript/ui.js
index aa440bf6..e2b9bfe4 100644
--- a/javascript/ui.js
+++ b/javascript/ui.js
@@ -351,7 +351,7 @@ onUiUpdate(function(){
 onOptionsChanged(function(){
     var elem = gradioApp().getElementById('sd_checkpoint_hash')
     var sd_checkpoint_hash = opts.sd_checkpoint_hash || ""
-    var shorthash = sd_checkpoint_hash.substr(0,10)
+    var shorthash = sd_checkpoint_hash.substring(0,10)
 
 	if(elem && elem.textContent != shorthash){
 	    elem.textContent = shorthash