diff --git a/src/simulator/src/data/undo.js b/src/simulator/src/data/undo.js
deleted file mode 100644
index 67f22005..00000000
--- a/src/simulator/src/data/undo.js
+++ /dev/null
@@ -1,51 +0,0 @@
-/* eslint-disable import/no-cycle */
-/**
- * Function to restore copy from backup
- * @param {Scope=} scope - The circuit on which undo is called
- * @category data
- */
-import { layoutModeGet } from '../layoutMode'
-import Scope, { scopeList } from '../circuit'
-import { loadScope } from './load'
-import { updateRestrictedElementsInScope } from '../restrictedElementDiv'
-import { forceResetNodesSet } from '../engine'
-/**
- * Function called to generate a prompt to save an image
- * @param {Scope=} - the circuit in which we want to call undo
- * @category data
- * @exports undo
- */
-export default function undo(scope = globalScope) {
-    if (layoutModeGet()) return
-    if (scope.backups.length < 2) return
-    const backupOx = globalScope.ox
-    const backupOy = globalScope.oy
-    const backupScale = globalScope.scale
-    globalScope.ox = 0
-    globalScope.oy = 0
-    const tempScope = new Scope(scope.name)
-    loading = true
-    const undoData = scope.backups.pop()
-    scope.history.push(undoData)
-    scope.backups.length !== 0 &&
-        loadScope(
-            tempScope,
-            JSON.parse(scope.backups[scope.backups.length - 1])
-        )
-    tempScope.backups = scope.backups
-    tempScope.history = scope.history
-    tempScope.id = scope.id
-    tempScope.name = scope.name
-    tempScope.testbenchData = scope.testbenchData
-    scopeList[scope.id] = tempScope
-    globalScope = tempScope
-    globalScope.ox = backupOx
-    globalScope.oy = backupOy
-    globalScope.scale = backupScale
-    loading = false
-    forceResetNodesSet(true)
-
-    // Updated restricted elements
-    updateRestrictedElementsInScope()
-}
-// for html file
diff --git a/src/simulator/src/data/undo.ts b/src/simulator/src/data/undo.ts
new file mode 100644
index 00000000..c2bf64b2
--- /dev/null
+++ b/src/simulator/src/data/undo.ts
@@ -0,0 +1,82 @@
+/* eslint-disable import/no-cycle */
+import { layoutModeGet } from '../layoutMode'
+import Scope, { scopeList } from '../circuit'
+import { loadScope } from './load'
+import { updateRestrictedElementsInScope } from '../restrictedElementDiv'
+import { forceResetNodesSet } from '../engine'
+
+// Declare global variables
+declare let globalScope: Scope
+declare let loading: boolean
+
+/**
+ * Function to restore copy from backup
+ * @param scope - The circuit on which undo is called
+ * @category data
+ */
+export default function undo(scope: Scope = globalScope): void {
+    if (layoutModeGet() || scope.backups.length < 2) return
+
+    const { ox, oy, scale } = saveGlobalScopePosition()
+    resetGlobalScopePosition()
+
+    loading = true
+    const undoData = popLastBackup(scope)
+    if (!undoData) return
+
+    scope.history.push(undoData)
+
+    const tempScope = createTempScope(scope)
+    if (!tempScope) return
+
+    updateGlobalScope(tempScope, ox, oy, scale)
+    forceResetNodesSet(true)
+    updateRestrictedElementsInScope()
+}
+
+function saveGlobalScopePosition() {
+    return {
+        ox: globalScope.ox,
+        oy: globalScope.oy,
+        scale: globalScope.scale,
+    }
+}
+
+function resetGlobalScopePosition() {
+    globalScope.ox = 0
+    globalScope.oy = 0
+}
+
+function popLastBackup(scope: Scope): string | undefined {
+    return scope.backups.pop()
+}
+
+function createTempScope(scope: Scope): Scope | undefined {
+    const tempScope = new Scope(scope.name)
+    if (scope.backups.length === 0) return tempScope
+
+    try {
+        loadScope(tempScope, JSON.parse(scope.backups[scope.backups.length - 1]))
+    } catch (error) {
+        console.error('Failed to parse backup data:', error)
+        loading = false
+        return undefined
+    }
+
+    tempScope.backups = scope.backups
+    tempScope.history = scope.history
+    tempScope.id = scope.id
+    tempScope.name = scope.name
+    tempScope.testbenchData = scope.testbenchData
+
+    return tempScope
+}
+
+function updateGlobalScope(tempScope: Scope, ox: number, oy: number, scale: number) {
+    scopeList[tempScope.id] = tempScope
+    globalScope = tempScope
+    globalScope.ox = ox
+    globalScope.oy = oy
+    globalScope.scale = scale
+    loading = false
+}
\ No newline at end of file