The application menu is now macOS only.

Fixed a `Parameter incorrect` error in Windows.
Updated Window example for mica/acrylic/tabbed windows.

docs/src/content/docs/changelog.mdx

@@ -29,6 +29,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - Renamed Service methods: `Name` -> `ServiceName`, `OnStartup` -> `ServiceStartup`, `OnShutdown` -> `ServiceShutdown` by [@leaanthony](https://github.com/leaanthony)
 - Moved `Path` and `Paths` methods to `application` package by [@leaanthony](https://github.com/leaanthony)
+- The application menu is now macOS only by [@leaanthony](https://github.com/leaanthony)
 
 ### Added
 
@@ -57,6 +58,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Change paths in windows Taskfile to forward slashes to ensure it works on non-Windows platforms by [@leaanthony](https://github.com/leaanthony)
 - Mac + Mac JS events now fixed by [@leaanthony](https://github.com/leaanthony)
 - Fixed event deadlock for macOS by [@leaanthony](https://github.com/leaanthony)
+- Fixed a `Parameter incorrect` error in Window initialisation on Windows when HTML provided but no JS by [@leaanthony](https://github.com/leaanthony)
 
 ### Changed
 
@@ -66,6 +68,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - ContextMenuData now returns a string instead of any by [@leaanthony](https://github.com/leaanthony)
 - `application.NewService` does not accept options as an optional parameter anymore (use `application.NewServiceWithOptions` instead) by [@leaanthony](https://github.com/leaanthony) in [#4024](https://github.com/wailsapp/wails/pull/4024)
 - Removed `nanoid` dependency by [@leaanthony](https://github.com/leaanthony)
+- Updated Window example for mica/acrylic/tabbed window styles by [@leaanthony](https://github.com/leaanthony)
 
 ## v3.0.0-alpha.9 - 2025-01-13
 

docs/src/content/docs/guides/menus.mdx

@@ -228,11 +228,9 @@ Application menus are the menus that appear at the top of your application windo
 
 ### Application Menu Behaviour
 
-When you set an application menu using `app.SetMenu()`, it becomes the default menu for all windows in your application. However, there are a few important behaviours to note:
+When you set an application menu using `app.SetMenu()`, it becomes the main menu on macOS.
+Menus are set on a pre-window basis for Windows/Linux.
 
-1. **Global Application Menu**: The menu set via `app.SetMenu()` acts as the default menu for all windows.
-
-2. **Per-Window Menu Override**: Individual windows can override the application menu by setting their own menu through window options:
 ```go
 app.NewWebviewWindowWithOptions(application.WebviewWindowOptions{
     Title: "Custom Menu Window",
@@ -242,16 +240,6 @@ app.NewWebviewWindowWithOptions(application.WebviewWindowOptions{
 })
 ```
 
-3. **Disable Window Menu**: On Windows, you can disable a window's menu completely even when there's a global application menu:
-```go 
-app.NewWebviewWindowWithOptions(application.WebviewWindowOptions{
-    Title: "No Menu Window",
-    Windows: application.WindowsWindow{
-        DisableMenu: true,  // Disable menu for this window
-    },
-})
-```
-
 Here's a complete example showing these different menu behaviours:
 
 ```go
@@ -267,15 +255,10 @@ func main() {
         window.SetTitle("New Window")
     })
     
-    // Set as application menu - default for all windows
+    // Set as application menu - this is for macOS
     app.SetMenu(appMenu)
 
-    // Window with default application menu
+    // Window with custom menu on Windows
-    app.NewWebviewWindowWithOptions(application.WebviewWindowOptions{
-        Title: "Default Menu",
-    })
-
-    // Window with custom menu
     customMenu := application.NewMenu()
     customMenu.Add("Custom Action")
     app.NewWebviewWindowWithOptions(application.WebviewWindowOptions{
@@ -285,14 +268,6 @@ func main() {
         },
     })
 
-    // Window with no menu
-    app.NewWebviewWindowWithOptions(application.WebviewWindowOptions{
-        Title: "No Menu",
-        Windows: application.WindowsWindow{
-            DisableMenu: true,
-        },
-    })
-
     app.Run()
 }
 ```

v3/examples/window/main.go

@@ -234,7 +234,6 @@ func main() {
 			OnClick(func(ctx *application.Context) {
 				app.NewWebviewWindowWithOptions(application.WebviewWindowOptions{
 					Windows: application.WindowsWindow{
-						DisableMenu: true,
 						ExStyle: getExStyle(),
 					},
 				}).
@@ -247,11 +246,7 @@ func main() {
 	}
 	myMenu.Add("New WebviewWindow (Listen to Move)").
 		OnClick(func(ctx *application.Context) {
-			w := app.NewWebviewWindowWithOptions(application.WebviewWindowOptions{
+			w := app.NewWebviewWindowWithOptions(application.WebviewWindowOptions{}).
-				Windows: application.WindowsWindow{
-					DisableMenu: true,
-				},
-			}).
 				SetTitle("WebviewWindow "+strconv.Itoa(windowCounter)).
 				SetRelativePosition(rand.Intn(1000), rand.Intn(800)).
 				SetURL("https://wails.io").
@@ -264,11 +259,7 @@ func main() {
 		})
 	myMenu.Add("New WebviewWindow (Listen to Resize)").
 		OnClick(func(ctx *application.Context) {
-			w := app.NewWebviewWindowWithOptions(application.WebviewWindowOptions{
+			w := app.NewWebviewWindowWithOptions(application.WebviewWindowOptions{}).
-				Windows: application.WindowsWindow{
-					DisableMenu: true,
-				},
-			}).
 				SetTitle("WebviewWindow "+strconv.Itoa(windowCounter)).
 				SetRelativePosition(rand.Intn(1000), rand.Intn(800)).
 				SetURL("https://wails.io").
@@ -389,7 +380,26 @@ func main() {
 					X:              rand.Intn(1000),
 					Y:              rand.Intn(800),
 					BackgroundType: application.BackgroundTypeTranslucent,
-					HTML:           "<html style='background-color: rgba(0,0,0,0);'><body></body></html>",
+					HTML: `
+<html style='background-color: rgba(0,0,0,0);'>
+  <head>
+    <style>
+      body {
+        background-color: rgba(0,0,0,0);
+        color: rgb(128, 128, 128);
+        font-family: sans-serif;
+        display: flex;
+        justify-content: center;
+        align-items: center;
+      }
+    </style>
+  </head>
+  <body>
+    <div>
+      <h2 style="text-align: center;">This is a Window with a Mica backdrop</h2>
+    </div>
+  </body>
+</html>`,
 					Windows: application.WindowsWindow{
 						BackdropType: application.Mica,
 					},
@@ -403,7 +413,26 @@ func main() {
 					X:              rand.Intn(1000),
 					Y:              rand.Intn(800),
 					BackgroundType: application.BackgroundTypeTranslucent,
-					HTML:           "<html style='background-color: rgba(0,0,0,0);'><body></body></html>",
+					HTML: `
+<html style='background-color: rgba(0,0,0,0);'>
+  <head>
+    <style>
+      body {
+        background-color: rgba(0,0,0,0);
+        color: rgb(128, 128, 128);
+        font-family: sans-serif;
+        display: flex;
+        justify-content: center;
+        align-items: center;
+      }
+    </style>
+  </head>
+  <body>
+    <div>
+      <h2 style="text-align: center;">This is a Window with an Acrylic backdrop</h2>
+    </div>
+  </body>
+</html>`,
 					Windows: application.WindowsWindow{
 						BackdropType: application.Acrylic,
 					},
@@ -417,7 +446,26 @@ func main() {
 					X:              rand.Intn(1000),
 					Y:              rand.Intn(800),
 					BackgroundType: application.BackgroundTypeTranslucent,
-					HTML:           "<html style='background-color: rgba(0,0,0,0);'><body></body></html>",
+					HTML: `
+<html style='background-color: rgba(0,0,0,0);'>
+  <head>
+    <style>
+      body {
+        background-color: rgba(0,0,0,0);
+        color: rgb(128, 128, 128);
+        font-family: sans-serif;
+        display: flex;
+        justify-content: center;
+        align-items: center;
+      }
+    </style>
+  </head>
+  <body>
+    <div>
+      <h2 style="text-align: center;">This is a Window with a Tabbed-effect backdrop</h2>
+    </div>
+  </body>
+</html>`,
 					Windows: application.WindowsWindow{
 						BackdropType: application.Tabbed,
 					},
@@ -686,6 +734,9 @@ func main() {
 		Mac: application.MacWindow{
 			DisableShadow: true,
 		},
+		Windows: application.WindowsWindow{
+			Menu: menu,
+		},
 	})
 
 	app.SetMenu(menu)

v3/pkg/application/webview_window_linux.go

@@ -262,9 +262,6 @@ func (w *linuxWebviewWindow) run() {
 	app := getNativeApplication()
 
 	var menu = w.menu
-	if menu == nil && globalApplication.ApplicationMenu != nil {
-		menu = globalApplication.ApplicationMenu.Clone()
-	}
 	if menu != nil {
 		InvokeSync(func() {
 			menu.Update()

v3/pkg/application/webview_window_options.go

@@ -258,10 +258,6 @@ type WindowsWindow struct {
 	// Default: 0
 	WindowDidMoveDebounceMS uint16
 
-	// Disable the menu bar for this window
-	// Default: false
-	DisableMenu bool
-
 	// Event mapping for the window. This allows you to define a translation from one event to another.
 	// Default: nil
 	EventMapping map[events.WindowEventType]events.WindowEventType

v3/pkg/application/webview_window_windows.go

@@ -305,15 +305,11 @@ func (w *windowsWebviewWindow) run() {
 	var appMenu w32.HMENU
 
 	// Process Menu
-	if !options.Windows.DisableMenu && !options.Frameless {
+	if !options.Frameless {
-		theMenu := globalApplication.ApplicationMenu
+		userMenu := w.parent.options.Windows.Menu
-		// Create the menu if we have one
+		if userMenu != nil {
-		if w.parent.options.Windows.Menu != nil {
+			userMenu.Update()
-			theMenu = w.parent.options.Windows.Menu
+			w.menu = NewApplicationMenu(w, userMenu)
-		}
-		if theMenu != nil {
-			theMenu.Update()
-			w.menu = NewApplicationMenu(w, theMenu)
 			w.menu.parentWindow = w
 			appMenu = w.menu.menu
 		}
@@ -1758,7 +1754,9 @@ func (w *windowsWebviewWindow) setupChromium() {
 		if w.parent.options.CSS != "" {
 			script += fmt.Sprintf("; addEventListener(\"DOMContentLoaded\", (event) => { document.head.appendChild(document.createElement('style')).innerHTML=\"%s\"; });", strings.ReplaceAll(w.parent.options.CSS, `"`, `\"`))
 		}
+		if script != "" {
 			chromium.Init(script)
+		}
 		chromium.NavigateToString(w.parent.options.HTML)
 	} else {
 		startURL, err := assetserver.GetStartURL(w.parent.options.URL)