clippy happier

rust/src_webpack/src/main.ts

@@ -1,4 +1,3 @@
-
 import { deepEqual } from 'fast-equals';
 
 declare var PUBLIC_URL: string;
@@ -8,7 +7,7 @@ document.body.innerHTML = require('./main.html') as string;
 
 
 import { TimeView } from "./timeview";
-import { PlantView, PlantViews } from "./plant";
+import { PlantViews } from "./plant";
 import { NetworkConfigView } from "./network";
 import { NightLampView } from "./nightlightview";
 import { TankConfigView } from "./tankview";
@@ -261,7 +260,6 @@ export class Controller {
   configChanged() {
     const current = controller.getConfig();
     var pretty = JSON.stringify(current, undefined, 0);
-    var initial = JSON.stringify(this.initialConfig, undefined, 0);
     controller.submitView.setJson(pretty);
 
     if (deepEqual(current, controller.initialConfig)) {
@@ -307,7 +305,7 @@ export class Controller {
     })
       .then(response => response.text())
       .then(
-        text => {
+        _ => {
           clearTimeout(timerId);
           controller.progressview.removeProgress("test_pump");
         }
@@ -507,3 +505,16 @@ controller.populateTimezones().then(_ => {
 
 controller.progressview.removeProgress("rebooting");
 
+window.addEventListener("beforeunload", (event) => {
+  const currentConfig = controller.getConfig();
+  
+  // Check if the current state differs from the initial configuration
+  if (!deepEqual(currentConfig, controller.initialConfig)) {
+    const confirmationMessage = "You have unsaved changes. Are you sure you want to leave this page?";
+    
+    // Standard behavior for displaying the confirmation dialog
+    event.preventDefault();
+    event.returnValue = confirmationMessage; // This will trigger the browser's default dialog
+    return confirmationMessage;
+  }
+});