Auto save comments to local storage to prevent losing work

app/javascript/controllers/autosave_controller.js

@@ -0,0 +1,50 @@
+import { Controller } from "@hotwired/stimulus"
+import { debounce } from "helpers/timing_helpers"
+
+export default class extends Controller {
+  static targets = ["input"]
+  static values = { key: String }
+  
+  initialize() {
+    this.debouncedSave = debounce(() => {
+      const content = this.inputTarget.value
+      if (content) {
+        localStorage.setItem(this.keyValue, content)
+      } else {
+        this.clear()
+      }
+    }, 300)
+  }
+  
+  connect() {
+    this.restoreContent()
+  }
+  
+  submit({ detail: { success } }) {
+    if (success) {
+      this.clear()
+    }
+  }
+
+  save() {
+    this.debouncedSave()
+  }
+  
+  clear() {
+    localStorage.removeItem(this.keyValue)
+  }
+  
+  restoreContent() {
+    const savedContent = localStorage.getItem(this.keyValue)
+    if (savedContent) {
+      this.inputTarget.value = savedContent
+      this.inputTarget.dispatchEvent(new CustomEvent('house-md:change', {
+        bubbles: true,
+        detail: { 
+          previousContent: '',
+          newContent: savedContent 
+        }
+      }))
+    }
+  }
+}