fix: Implement robust cross-platform window visibility fallback for issue #2861

Addresses the issue where application windows fail to show on Windows 10 Pro due to efficiency mode preventing WebView2 NavigationCompleted events. ## Changes Made ### Windows (webview_window_windows.go) - **Decouple window container from WebView state**: Window now shows immediately - **Add timeout fallback**: 3-second timeout to show WebView if navigation is delayed - **Prevent efficiency mode**: Set WebView2 IsVisible=true per Microsoft recommendation - **Enhanced state tracking**: Added showRequested, visibilityTimeout, windowShown fields - **Robust navigation completion**: Improved handler to work with new visibility logic ### macOS (webview_window_darwin.go) - **Documentation**: Added comment noting macOS already follows best practices - **No functional changes**: macOS implementation already robust ### Linux (webview_window_linux.go, linux_cgo.go, linux_purego.go) - **Add missing methods**: Implemented show()/hide() methods in main Linux file - **CGO implementation**: Added windowShow()/windowHide() delegation methods - **Purego implementation**: Added windowShow()/windowHide() methods for purego builds - **Consistent behavior**: Matches CGO implementation with position saving ## Implementation Pattern Adopts the following pattern: 1. **Separate concerns**: Window container vs WebView content readiness 2. **Immediate visibility**: Show window container immediately 3. **Progressive enhancement**: Show WebView content when ready 4. **Robust fallbacks**: Timeout and multiple strategies for edge cases ## Testing Considerations - Windows 10 Pro efficiency mode scenarios - WebView2 navigation delays or failures - Cross-platform consistency - Performance impact of timeout mechanisms Fixes #2861 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <noreply@anthropic.com>
2026-03-14 14:45:49 +01:00 · 2025-06-12 23:03:34 +10:00 · 2025-06-12 23:03:34 +10:00 · d03a63e1b7
commit d03a63e1b7
parent 1d75dd030f
15 changed files with 1370 additions and 5 deletions
--- a/docs/src/content/docs/changelog.mdx
+++ b/docs/src/content/docs/changelog.mdx
@ -82,6 +82,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 -  Add File Association support for mac by [@wimaha](https://github.com/wimaha) in [#4177](https://github.com/wailsapp/wails/pull/4177)
 - Add `wails3 tool version` for semantic version bumping by [@leaanthony](https://github.com/leaanthony)
 - Add badging support for macOS and Windows by [@popaprozac](https://github.com/popaprozac) in [#](https://github.com/wailsapp/wails/pull/4234)
+
 ### Fixed

 - Fixed Windows+Linux Edit Menu issues by [@leaanthony](https://github.com/leaanthony) in [#3f78a3a](https://github.com/wailsapp/wails/commit/3f78a3a8ce7837e8b32242c8edbbed431c68c062)
@ -127,6 +128,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Fixed system trays not showing after taskbar restarts by [@leaanthony](https://github.com/leaanthony) based on work by @kron.
 - Fixed fallbackResponseWriter not implementing Flush() in [#4245](https://github.com/wailsapp/wails/pull/4245)
 - Fixed fallbackResponseWriter not implementing Flush() by [@superDingda] in [#4236](https://github.com/wailsapp/wails/issues/4236)
+- Fixed Windows Efficiency mode startup race condition by [@leaanthony](https://github.com/leaanthony)

 ### Changed

--- a/v3/go.mod
+++ b/v3/go.mod
@ -18,7 +18,7 @@ require (
 	github.com/google/uuid v1.6.0
 	github.com/goreleaser/nfpm/v2 v2.41.3
 	github.com/jackmordaunt/icns/v2 v2.2.7
-	github.com/jaypipes/ghw v0.13.0
+	github.com/jaypipes/ghw v0.17.0
 	github.com/leaanthony/clir v1.7.0
 	github.com/leaanthony/go-ansi-parser v1.6.1
 	github.com/leaanthony/gosod v1.0.4
--- a/v3/go.sum
+++ b/v3/go.sum
@ -174,8 +174,8 @@ github.com/huandu/xstrings v1.5.0 h1:2ag3IFq9ZDANvthTwTiqSSZLjDc+BedvHPAp5tJy2TI
 github.com/huandu/xstrings v1.5.0/go.mod h1:y5/lhBue+AyNmUVz9RLU9xbLR0o4KIIExikq4ovT0aE=
 github.com/jackmordaunt/icns/v2 v2.2.7 h1:K/RbfvuzjmjVY5y4g+XENRs8ZZatwz4YnLHypa2KwQg=
 github.com/jackmordaunt/icns/v2 v2.2.7/go.mod h1:ovoTxGguSuoUGKMk5Nn3R7L7BgMQkylsO+bblBuI22A=
-github.com/jaypipes/ghw v0.13.0 h1:log8MXuB8hzTNnSktqpXMHc0c/2k/WgjOMSUtnI1RV4=
-github.com/jaypipes/ghw v0.13.0/go.mod h1:In8SsaDqlb1oTyrbmTC14uy+fbBMvp+xdqX51MidlD8=
+github.com/jaypipes/ghw v0.17.0 h1:EVLJeNcy5z6GK/Lqby0EhBpynZo+ayl8iJWY0kbEUJA=
+github.com/jaypipes/ghw v0.17.0/go.mod h1:In8SsaDqlb1oTyrbmTC14uy+fbBMvp+xdqX51MidlD8=
 github.com/jaypipes/pcidb v1.0.1 h1:WB2zh27T3nwg8AE8ei81sNRb9yWBii3JGNJtT7K9Oic=
 github.com/jaypipes/pcidb v1.0.1/go.mod h1:6xYUz/yYEyOkIkUt2t2J2folIuZ4Yg6uByCGFXMCeE4=
 github.com/jbenet/go-context v0.0.0-20150711004518-d14ea06fba99 h1:BQSFePA1RWJOlocH6Fxy8MmwDt+yVQYULKfN0RoTN8A=
--- a/v3/pkg/application/linux_cgo.go
+++ b/v3/pkg/application/linux_cgo.go
@ -1009,6 +1009,10 @@ func (w *linuxWebviewWindow) hide() {
 	C.gtk_widget_hide(w.gtkWidget())
 }

+func (w *linuxWebviewWindow) windowHide() {
+	C.gtk_widget_hide(w.gtkWidget())
+}
+
 func (w *linuxWebviewWindow) isFullscreen() bool {
 	gdkWindow := C.gtk_widget_get_window(w.gtkWidget())
 	state := C.gdk_window_get_state(gdkWindow)
@ -1123,6 +1127,13 @@ func (w *linuxWebviewWindow) show() {
 	//w.setPosition(w.lastX, w.lastY)
 }

+func (w *linuxWebviewWindow) windowShow() {
+	if w.gtkWidget() == nil {
+		return
+	}
+	C.gtk_widget_show_all(w.gtkWidget())
+}
+
 func windowIgnoreMouseEvents(window pointer, webview pointer, ignore bool) {
 	var enable C.int
 	if ignore {
--- a/v3/pkg/application/linux_purego.go
+++ b/v3/pkg/application/linux_purego.go
@ -1206,3 +1206,18 @@ func runSaveFileDialog(dialog *SaveFileDialogStruct) (string, error) {
 func isOnMainThread() bool {
 	return mainThreadId == gThreadSelf()
 }
+
+// linuxWebviewWindow show/hide methods for purego implementation
+func (w *linuxWebviewWindow) windowShow() {
+	if w.window == 0 {
+		return
+	}
+	windowShow(w.window)
+}
+
+func (w *linuxWebviewWindow) windowHide() {
+	if w.window == 0 {
+		return
+	}
+	windowHide(w.window)
+}
--- a/v3/pkg/application/webview_window_darwin.go
+++ b/v3/pkg/application/webview_window_darwin.go
@ -903,6 +903,8 @@ func (w *macosWebviewWindow) getScreen() (*Screen, error) {
 }

 func (w *macosWebviewWindow) show() {
+	// macOS implementation is already robust - window container shows immediately
+	// This is the preferred pattern that Windows should follow
 	C.windowShow(w.nsWindow)
 }

--- a/v3/pkg/application/webview_window_linux.go
+++ b/v3/pkg/application/webview_window_linux.go
@ -412,6 +412,18 @@ func (w *linuxWebviewWindow) setIgnoreMouseEvents(ignore bool) {
 	w.ignoreMouse(w.ignoreMouseEvents)
 }

+func (w *linuxWebviewWindow) show() {
+	// Linux implementation is robust - window shows immediately
+	// This is the preferred pattern that Windows should follow
+	w.windowShow()
+}
+
+func (w *linuxWebviewWindow) hide() {
+	// Save position before hiding (consistent with CGO implementation)
+	w.lastX, w.lastY = w.position()
+	w.windowHide()
+}
+
 func (w *linuxWebviewWindow) showMenuBar()   {}
 func (w *linuxWebviewWindow) hideMenuBar()   {}
 func (w *linuxWebviewWindow) toggleMenuBar() {}
--- a/v3/pkg/application/webview_window_windows.go
+++ b/v3/pkg/application/webview_window_windows.go
@ -57,6 +57,11 @@ type windowsWebviewWindow struct {
 	chromium                   *edge.Chromium
 	webviewNavigationCompleted bool

+	// Window visibility management - robust fallback for issue #2861
+	showRequested     bool        // Track if show() was called before navigation completed
+	visibilityTimeout *time.Timer // Timeout to show window if navigation is delayed
+	windowShown       bool        // Track if window container has been shown
+
 	// resizeBorder* is the width/height of the resize border in pixels.
 	resizeBorderWidth  int32
 	resizeBorderHeight int32
@ -960,14 +965,45 @@ func (w *windowsWebviewWindow) printStyle() {
 }

 func (w *windowsWebviewWindow) show() {
+	// Always show the window container immediately (decouple from WebView state)
+	// This fixes issue #2861 where efficiency mode prevents window visibility
+	w32.ShowWindow(w.hwnd, w32.SW_SHOW)
+	w.windowShown = true
+	w.showRequested = true
+
+	// Show WebView if navigation has completed
 	if w.webviewNavigationCompleted {
 		w.chromium.Show()
-		w32.ShowWindow(w.hwnd, w32.SW_SHOW)
+		// Cancel timeout since we can show immediately
+		if w.visibilityTimeout != nil {
+			w.visibilityTimeout.Stop()
+			w.visibilityTimeout = nil
+		}
+	} else {
+		// Start timeout to show WebView if navigation is delayed (fallback for efficiency mode)
+		if w.visibilityTimeout == nil {
+			w.visibilityTimeout = time.AfterFunc(3*time.Second, func() {
+				// Show WebView even if navigation hasn't completed
+				// This prevents permanent invisibility in efficiency mode
+				if !w.webviewNavigationCompleted && w.chromium != nil {
+					w.chromium.Show()
+				}
+				w.visibilityTimeout = nil
+			})
+		}
 	}
 }

 func (w *windowsWebviewWindow) hide() {
 	w32.ShowWindow(w.hwnd, w32.SW_HIDE)
+	w.windowShown = false
+	w.showRequested = false
+
+	// Cancel any pending visibility timeout
+	if w.visibilityTimeout != nil {
+		w.visibilityTimeout.Stop()
+		w.visibilityTimeout = nil
+	}
 }

 // Get the screen for the current window
@ -990,6 +1026,10 @@ func newWindowImpl(parent *WebviewWindow) *windowsWebviewWindow {
 		parent:             parent,
 		resizeBorderWidth:  int32(w32.GetSystemMetrics(w32.SM_CXSIZEFRAME)),
 		resizeBorderHeight: int32(w32.GetSystemMetrics(w32.SM_CYSIZEFRAME)),
+		// Initialize visibility tracking fields
+		showRequested:     false,
+		visibilityTimeout: nil,
+		windowShown:       false,
 	}

 	return result
@ -1640,6 +1680,14 @@ func (w *windowsWebviewWindow) setupChromium() {

 	chromium.Embed(w.hwnd)

+	// Prevent efficiency mode by keeping WebView2 visible (fixes issue #2861)
+	// Microsoft recommendation: keep IsVisible = true to avoid efficiency mode
+	// See: https://github.com/MicrosoftEdge/WebView2Feedback/discussions/4021
+	err := chromium.PutIsVisible(true)
+	if err != nil {
+		globalApplication.error("Failed to set WebView2 visibility for efficiency mode prevention: %v", err)
+	}
+
 	if chromium.HasCapability(edge.SwipeNavigation) {
 		err := chromium.PutIsSwipeNavigationEnabled(opts.EnableSwipeGestures)
 		if err != nil {
@ -1837,6 +1885,12 @@ func (w *windowsWebviewWindow) navigationCompleted(sender *edge.ICoreWebView2, a
 	}
 	w.webviewNavigationCompleted = true

+	// Cancel any pending visibility timeout since navigation completed
+	if w.visibilityTimeout != nil {
+		w.visibilityTimeout.Stop()
+		w.visibilityTimeout = nil
+	}
+
 	wasFocused := w.isFocused()
 	// Hack to make it visible: https://github.com/MicrosoftEdge/WebView2Feedback/issues/1077#issuecomment-825375026
 	err := w.chromium.Hide()
@ -1850,8 +1904,13 @@ func (w *windowsWebviewWindow) navigationCompleted(sender *edge.ICoreWebView2, a
 	if wasFocused {
 		w.focus()
 	}
+
+	// Only call parent.Show() if not hidden and show was requested but window wasn't shown yet
+	// The new robust show() method handles window visibility independently
 	if !w.parent.options.Hidden {
-		w.parent.Show()
+		if w.showRequested && !w.windowShown {
+			w.parent.Show()
+		}
 		w.update()
 	}
 }
--- a/v3/tests/window-visibility-test/.gitignore
+++ b/v3/tests/window-visibility-test/.gitignore
@ -0,0 +1,19 @@
+# Compiled binary
+window-visibility-test
+window-visibility-test.exe
+
+# Build artifacts
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+
+# Test binaries
+*.test
+
+# Output of the go coverage tool
+*.out
+
+# Go workspace file
+go.work
--- a/v3/tests/window-visibility-test/README.md
+++ b/v3/tests/window-visibility-test/README.md
@ -0,0 +1,146 @@
+# Window Visibility Test - Issue #2861
+
+This example demonstrates and tests the fixes implemented for [Wails v3 Issue #2861](https://github.com/wailsapp/wails/issues/2861) regarding application windows not showing on Windows 10 Pro due to efficiency mode.
+
+## Problem Background
+
+On Windows systems, the "efficiency mode" feature could prevent Wails applications from displaying windows properly. This occurred because:
+
+1. **WebView2 NavigationCompleted events** could be delayed or missed in efficiency mode
+2. **Window visibility was gated** behind WebView2 navigation completion
+3. **No fallback mechanisms** existed for delayed or failed navigation events
+
+## Solution Implemented
+
+The fix implements a **robust cross-platform window visibility pattern**:
+
+### Windows Improvements
+- ✅ **Decouple window container from WebView state** - Windows show immediately
+- ✅ **3-second timeout fallback** - Shows WebView if navigation is delayed
+- ✅ **Efficiency mode prevention** - Sets WebView2 `IsVisible=true` per Microsoft guidance
+- ✅ **Enhanced state tracking** - Proper visibility state management
+
+### Cross-Platform Consistency  
+- ✅ **macOS** - Already robust, documented best practices
+- ✅ **Linux** - Added missing show/hide methods for both CGO and purego builds
+
+## Test Scenarios
+
+This example provides comprehensive testing for:
+
+### 1. **Basic Window Tests**
+- **Normal Window**: Standard window creation - should appear immediately
+- **Delayed Content Window**: Simulates heavy content loading (like Vue.js apps)
+- **Hidden → Show Test**: Tests delayed showing after initial creation
+
+### 2. **Stress Tests**
+- **Multiple Windows**: Creates 3 windows simultaneously
+- **Rapid Creation**: Creates windows in quick succession
+
+### 3. **Critical Issue #2861 Test**
+- **Efficiency Mode Test**: Specifically designed to reproduce and verify the fix
+- Tests window container vs content loading timing
+- Includes heavy content simulation
+
+## How to Run
+
+```bash
+cd /path/to/wails/v3/examples/window-visibility-test
+wails dev
+```
+
+## Testing Instructions
+
+### What to Look For
+1. **Immediate Window Appearance** - Windows should appear within 100ms of clicking buttons
+2. **Progressive Loading** - Content may load progressively, but window container visible immediately  
+3. **No Efficiency Mode Issues** - Windows appear even if Task Manager shows "efficiency mode"
+4. **Consistent Cross-Platform Behavior** - Similar behavior on Windows, macOS, and Linux
+
+### How to Test
+1. **Note the current time** displayed in the app
+2. **Click any test button** or use menu items
+3. **Immediately observe** if a window appears (should be within 100ms)
+4. **Wait for content** to load and check reported timing
+5. **Try multiple tests** in sequence to test robustness
+6. **Test both buttons and menu items** for comprehensive coverage
+
+### Expected Results
+- ✅ Window containers appear immediately upon button click
+- ✅ Content loads progressively within 2-3 seconds
+- ✅ No blank or invisible windows, even under efficiency mode
+- ✅ Activity log shows sub-100ms window creation times
+- ✅ All test scenarios work consistently
+
+## Manual Testing Checklist
+
+### Windows 10 Pro (Primary Target)
+- [ ] Test with efficiency mode enabled in Task Manager
+- [ ] Create windows while system is under load
+- [ ] Test rapid window creation scenarios
+- [ ] Verify WebView2 content loads after container appears
+- [ ] Check activity log for sub-100ms creation times
+
+### Windows 11
+- [ ] Verify consistent behavior with Windows 10 Pro fixes
+- [ ] Test efficiency mode scenarios
+- [ ] Validate timeout fallback mechanisms
+
+### macOS
+- [ ] Confirm existing robust behavior maintained
+- [ ] Test all window creation scenarios
+- [ ] Verify no regressions introduced
+
+### Linux
+- [ ] Test both CGO and purego builds
+- [ ] Verify new show/hide methods work correctly
+- [ ] Test window positioning and timing
+
+## Technical Implementation Details
+
+### Window Creation Flow
+```
+1. User clicks button → JavaScript calls Go backend
+2. Go creates WebviewWindow → Sets properties
+3. Go calls window.Show() → IMMEDIATE window container display
+4. WebView2 starts navigation → Progressive content loading
+5. Timeout fallback ensures WebView shows even if navigation delayed
+```
+
+### Key Code Changes
+- **Windows**: `/v3/pkg/application/webview_window_windows.go`
+- **macOS**: `/v3/pkg/application/webview_window_darwin.go`  
+- **Linux**: `/v3/pkg/application/webview_window_linux.go`, `linux_cgo.go`, `linux_purego.go`
+
+## Reporting Test Results
+
+When testing, please report:
+
+1. **Platform & OS Version** (e.g., "Windows 10 Pro 21H2", "macOS 13.1", "Ubuntu 22.04")
+2. **Window Creation Timing** (from activity log)
+3. **Any Delayed or Missing Windows**
+4. **Efficiency Mode Status** (Windows only - check Task Manager)
+5. **Content Loading Behavior** (immediate container vs progressive content)
+6. **Any Error Messages** in activity log or console
+
+### Sample Test Report Format
+```
+Platform: Windows 10 Pro 21H2
+Efficiency Mode: Enabled
+Results:
+- Normal Window: ✅ Appeared immediately (<50ms)
+- Delayed Content: ✅ Container immediate, content loaded in 2.1s
+- Multiple Windows: ✅ All 3 appeared simultaneously
+- Critical Test: ✅ Window appeared immediately, content progressive
+Notes: No issues observed, all windows visible immediately
+```
+
+## Architecture Notes
+
+This example demonstrates the **preferred window visibility pattern** for web-based desktop applications:
+
+1. **Separate Concerns**: Window container vs web content readiness
+2. **Immediate Feedback**: Users see window immediately 
+3. **Progressive Enhancement**: Content loads and appears when ready
+4. **Robust Fallbacks**: Multiple strategies for edge cases
+5. **Cross-Platform Consistency**: Same behavior on all platforms
--- a/v3/tests/window-visibility-test/TESTING_GUIDE.md
+++ b/v3/tests/window-visibility-test/TESTING_GUIDE.md
@ -0,0 +1,159 @@
+# Testing Guide - Window Visibility Issue #2861
+
+## Quick Start
+
+1. **Build and run the application:**
+   ```bash
+   cd v3/examples/window-visibility-test
+   ./build.sh
+   # OR
+   wails dev
+   ```
+
+2. **Main testing interface:**
+   - The app opens with a comprehensive testing dashboard
+   - Contains multiple test scenarios accessible via buttons
+   - Also provides menu-based testing (File, Tests, Help menus)
+   - Real-time activity logging with precise timing
+
+## Critical Test Cases
+
+### 🎯 **Issue #2861 Reproduction Test** (Most Important)
+**Button:** "Efficiency Mode Test"
+**Expected:** Window container appears immediately, content loads progressively
+**Watch for:** 
+- Window visible within 100ms of button click
+- Content loading message appears initially
+- Content completes loading after 2-3 seconds
+- No blank or invisible windows
+
+### ⏳ **Delayed Content Simulation**
+**Button:** "Create Delayed Content Window"  
+**Expected:** Tests navigation completion timing
+**Watch for:**
+- Window container appears immediately
+- Loading spinner visible initially
+- Content loads after 3-second delay
+- Window remains visible throughout
+
+### 🔄 **Hidden → Show Robustness**
+**Button:** "Hidden → Show Test"
+**Expected:** Tests delayed show() calls
+**Watch for:**
+- Initial response in activity log
+- Window appears after exactly 2 seconds
+- No timing issues or failures
+
+## Platform-Specific Testing
+
+### Windows 10 Pro (Primary Target)
+**Enable Efficiency Mode Testing:**
+1. Open Task Manager → Processes tab
+2. Find the test application process
+3. Right-click → "Efficiency mode" (if available)
+4. Run all test scenarios
+5. Verify windows still appear immediately
+
+**Key Metrics:**
+- Window creation: < 100ms
+- Content loading: 2-3 seconds
+- No invisible windows under any conditions
+
+### Windows 11
+**Similar to Windows 10 Pro but also test:**
+- New Windows 11 efficiency features
+- Multiple monitor scenarios
+- High DPI scaling
+
+### macOS
+**Focus on consistency:**
+- All scenarios should work identical to Windows
+- No regressions in existing robust behavior
+- Test across different macOS versions if possible
+
+### Linux
+**Test both build variants:**
+```bash
+# CGO build (default)
+wails dev
+
+# Purego build  
+CGO_ENABLED=0 wails dev
+```
+- Verify both variants behave identically
+- Test across different Linux distributions
+
+## Success Criteria
+
+### ✅ **Pass Conditions**
+- All windows appear within 100ms of button click
+- Activity log shows consistent sub-100ms timing
+- Content loads progressively without blocking window visibility
+- No blank, invisible, or delayed windows under any test scenario
+- Efficiency mode (Windows) does not prevent window appearance
+- Menu and button testing yield identical results
+
+### ❌ **Fail Conditions**  
+- Any window takes >200ms to appear
+- Blank or invisible windows under any condition
+- Window visibility blocked by content loading
+- Efficiency mode prevents window appearance
+- Inconsistent behavior between test methods
+- Platform-specific failures
+
+## Reporting Results
+
+**Please provide this information:**
+
+```
+Platform: [Windows 10 Pro/Windows 11/macOS/Linux distro + version]
+Build Type: [CGO/Purego] (Linux only)
+Efficiency Mode: [Enabled/Disabled/N/A] (Windows only)
+
+Test Results:
+- Normal Window: [✅ Pass / ❌ Fail] - [timing in ms]
+- Delayed Content: [✅ Pass / ❌ Fail] - [container timing / content timing]  
+- Hidden→Show: [✅ Pass / ❌ Fail] - [notes]
+- Multiple Windows: [✅ Pass / ❌ Fail] - [notes]
+- Efficiency Mode Test: [✅ Pass / ❌ Fail] - [critical timing results]
+
+Notes:
+[Any additional observations, error messages, or unexpected behavior]
+```
+
+## Advanced Testing Scenarios
+
+### **Rapid Stress Testing**
+1. Click "Rapid Creation Test" multiple times quickly
+2. Use keyboard shortcuts to rapidly access menu items
+3. Create multiple windows then close them rapidly
+4. Test system under load (other applications running)
+
+### **Edge Case Testing**
+1. Test during system startup (high load)
+2. Test with multiple monitors
+3. Test with different DPI scaling settings
+4. Test while other WebView2 applications are running
+
+### **Timing Verification**
+1. Use browser dev tools (F12) to check console timing
+2. Compare activity log timing with system clock
+3. Test on slower/older hardware if available
+4. Verify timing consistency across multiple runs
+
+## Troubleshooting
+
+### **Common Issues**
+- **Blank window**: Check activity log for error messages
+- **Slow timing**: Verify system isn't under heavy load
+- **Build failures**: Ensure Wails v3 CLI is latest version
+- **Import errors**: Run `go mod tidy` in example directory
+
+### **Debug Information**
+The application provides extensive logging:
+- Browser console (F12) shows JavaScript timing
+- Activity log shows backend call timing  
+- Go application logs show window creation details
+- Check system Task Manager for process efficiency mode status
+
+This comprehensive testing should validate that the window visibility fixes successfully resolve issue #2861 across all supported platforms.
--- a/v3/tests/window-visibility-test/assets/index.html
+++ b/v3/tests/window-visibility-test/assets/index.html
@ -0,0 +1,431 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Window Visibility Test - Issue #2861</title>
+    <style>
+        * {
+            margin: 0;
+            padding: 0;
+            box-sizing: border-box;
+        }
+
+        body {
+            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
+            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
+            color: white;
+            min-height: 100vh;
+            padding: 20px;
+            overflow-x: hidden;
+        }
+
+        .container {
+            max-width: 1000px;
+            margin: 0 auto;
+        }
+
+        .header {
+            text-align: center;
+            margin-bottom: 40px;
+            background: rgba(255, 255, 255, 0.1);
+            padding: 30px;
+            border-radius: 15px;
+            backdrop-filter: blur(10px);
+        }
+
+        .header h1 {
+            font-size: 2.5em;
+            margin-bottom: 10px;
+            text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
+        }
+
+        .header p {
+            font-size: 1.2em;
+            opacity: 0.9;
+        }
+
+        .test-section {
+            background: rgba(255, 255, 255, 0.1);
+            border-radius: 15px;
+            padding: 25px;
+            margin-bottom: 25px;
+            backdrop-filter: blur(10px);
+            border: 1px solid rgba(255, 255, 255, 0.2);
+        }
+
+        .test-section h2 {
+            font-size: 1.5em;
+            margin-bottom: 15px;
+            color: #fff;
+            display: flex;
+            align-items: center;
+            gap: 10px;
+        }
+
+        .test-section p {
+            margin-bottom: 15px;
+            line-height: 1.6;
+            opacity: 0.9;
+        }
+
+        .button-grid {
+            display: grid;
+            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
+            gap: 15px;
+            margin-top: 20px;
+        }
+
+        .test-button {
+            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
+            border: none;
+            border-radius: 10px;
+            padding: 15px 20px;
+            color: white;
+            font-size: 14px;
+            font-weight: 600;
+            cursor: pointer;
+            transition: all 0.3s ease;
+            border: 2px solid rgba(255, 255, 255, 0.3);
+            position: relative;
+            overflow: hidden;
+        }
+
+        .test-button:hover {
+            transform: translateY(-2px);
+            box-shadow: 0 8px 25px rgba(0,0,0,0.3);
+            border-color: rgba(255, 255, 255, 0.5);
+        }
+
+        .test-button:active {
+            transform: translateY(0);
+        }
+
+        .test-button::before {
+            content: '';
+            position: absolute;
+            top: 0;
+            left: -100%;
+            width: 100%;
+            height: 100%;
+            background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
+            transition: left 0.5s;
+        }
+
+        .test-button:hover::before {
+            left: 100%;
+        }
+
+        .status-display {
+            background: rgba(0, 0, 0, 0.2);
+            border-radius: 8px;
+            padding: 15px;
+            margin-top: 20px;
+            border-left: 4px solid #4CAF50;
+        }
+
+        .status-display h3 {
+            margin-bottom: 10px;
+            color: #4CAF50;
+        }
+
+        .log-entry {
+            padding: 8px 12px;
+            margin: 5px 0;
+            background: rgba(255, 255, 255, 0.1);
+            border-radius: 6px;
+            font-family: 'Courier New', monospace;
+            font-size: 0.9em;
+            animation: slideIn 0.3s ease-out;
+        }
+
+        @keyframes slideIn {
+            from {
+                opacity: 0;
+                transform: translateX(-20px);
+            }
+            to {
+                opacity: 1;
+                transform: translateX(0);
+            }
+        }
+
+        .critical-test {
+            border-left: 4px solid #ff6b6b;
+        }
+
+        .critical-test h2 {
+            color: #ff6b6b;
+        }
+
+        .info-box {
+            background: rgba(52, 152, 219, 0.2);
+            border: 1px solid rgba(52, 152, 219, 0.4);
+            border-radius: 8px;
+            padding: 15px;
+            margin: 20px 0;
+        }
+
+        .info-box h4 {
+            color: #3498db;
+            margin-bottom: 8px;
+        }
+
+        .timing-display {
+            text-align: center;
+            font-size: 1.1em;
+            margin: 20px 0;
+            padding: 15px;
+            background: rgba(255, 255, 255, 0.1);
+            border-radius: 8px;
+        }
+
+        .emoji {
+            font-size: 1.2em;
+            margin-right: 8px;
+        }
+
+        .menu-note {
+            background: rgba(255, 193, 7, 0.2);
+            border: 1px solid rgba(255, 193, 7, 0.4);
+            border-radius: 8px;
+            padding: 15px;
+            margin: 20px 0;
+            color: #fff;
+        }
+
+        .menu-note strong {
+            color: #ffc107;
+        }
+    </style>
+</head>
+<body>
+    <div class="container">
+        <div class="header">
+            <h1>🪟 Window Visibility Test</h1>
+            <p>Testing fixes for Wails v3 Issue #2861 - Windows 10 Pro Efficiency Mode</p>
+            <div class="timing-display">
+                <span id="current-time">Current Time: --:--:--</span>
+            </div>
+        </div>
+
+        <div class="test-section">
+            <h2><span class="emoji">✅</span>Basic Window Tests</h2>
+            <p>These tests verify that windows appear immediately when requested, regardless of WebView content loading state.</p>
+            <div class="button-grid">
+                <button class="test-button" onclick="createNormalWindow()">
+                    Create Normal Window
+                </button>
+                <button class="test-button" onclick="createDelayedContentWindow()">
+                    Create Delayed Content Window
+                </button>
+                <button class="test-button" onclick="createHiddenThenShowWindow()">
+                    Hidden → Show Test
+                </button>
+            </div>
+        </div>
+
+        <div class="test-section">
+            <h2><span class="emoji">⚡</span>Stress Tests</h2>
+            <p>These tests push the window system to verify robustness under load and timing edge cases.</p>
+            <div class="button-grid">
+                <button class="test-button" onclick="createMultipleWindows()">
+                    Multiple Windows (3x)
+                </button>
+                <button class="test-button" onclick="rapidWindowCreation()">
+                    Rapid Creation Test
+                </button>
+            </div>
+        </div>
+
+        <div class="test-section critical-test">
+            <h2><span class="emoji">🔬</span>Critical Issue #2861 Test</h2>
+            <p>This test specifically targets the Windows efficiency mode bug where WebView2 NavigationCompleted events could be delayed or missed.</p>
+            
+            <div class="info-box">
+                <h4>Expected Behavior:</h4>
+                <ul>
+                    <li>Window container appears <strong>immediately</strong> upon button click</li>
+                    <li>Content loads progressively (may take 2-3 seconds)</li>
+                    <li>No blank or invisible windows, even under efficiency mode</li>
+                </ul>
+            </div>
+            
+            <div class="button-grid">
+                <button class="test-button" onclick="createEfficiencyModeTestWindow()">
+                    🎯 Efficiency Mode Test
+                </button>
+            </div>
+        </div>
+
+        <div class="test-section">
+            <h2><span class="emoji">📊</span>Test Results & Timing</h2>
+            <p>Monitor window creation timing and behavior. Each button click should result in immediate window visibility.</p>
+            
+            <div class="status-display">
+                <h3>Activity Log</h3>
+                <div id="activity-log">
+                    <div class="log-entry">Ready for testing... Click any button to begin.</div>
+                </div>
+            </div>
+        </div>
+
+        <div class="test-section">
+            <h2><span class="emoji">📝</span>Testing Instructions</h2>
+            <div class="info-box">
+                <h4>What to Look For:</h4>
+                <ul>
+                    <li><strong>Immediate Window Appearance:</strong> Windows should appear within 100ms of clicking</li>
+                    <li><strong>Progressive Loading:</strong> Content may load progressively, but window container should be visible immediately</li>
+                    <li><strong>No Efficiency Mode Issues:</strong> On Windows, windows should still appear even if Task Manager shows "efficiency mode"</li>
+                    <li><strong>Consistent Behavior:</strong> All platforms (Windows, macOS, Linux) should behave similarly</li>
+                </ul>
+            </div>
+            
+            <div class="info-box">
+                <h4>How to Test:</h4>
+                <ol>
+                    <li>Note the current time displayed above</li>
+                    <li>Click any test button</li>
+                    <li>Immediately observe if a window appears (should be within 100ms)</li>
+                    <li>Wait for content to load and check the reported timing</li>
+                    <li>Try multiple tests in sequence</li>
+                    <li>Test both buttons and menu items</li>
+                </ol>
+            </div>
+        </div>
+    </div>
+
+    <script type="module">
+        import {WindowTestService} from "./bindings/window-visibility-test";
+        
+        let logCounter = 0;
+
+        // Update current time every second
+        function updateCurrentTime() {
+            const now = new Date();
+            document.getElementById('current-time').textContent = 
+                'Current Time: ' + now.toLocaleTimeString() + '.' + String(now.getMilliseconds()).padStart(3, '0');
+        }
+        setInterval(updateCurrentTime, 100);
+        updateCurrentTime();
+
+        // Logging function
+        function logActivity(message, isError = false) {
+            const log = document.getElementById('activity-log');
+            const entry = document.createElement('div');
+            entry.className = 'log-entry';
+            if (isError) entry.style.borderLeft = '4px solid #ff6b6b';
+            
+            const timestamp = new Date().toLocaleTimeString() + '.' + String(new Date().getMilliseconds()).padStart(3, '0');
+            entry.innerHTML = `<strong>[${timestamp}]</strong> ${message}`;
+            
+            log.appendChild(entry);
+            log.scrollTop = log.scrollHeight;
+            
+            // Keep only last 10 entries
+            while (log.children.length > 10) {
+                log.removeChild(log.firstChild);
+            }
+            
+            console.log(`[Window Test] ${timestamp}: ${message}`);
+        }
+
+        // Window creation functions that call the Go backend
+        async function createNormalWindow() {
+            const startTime = performance.now();
+            logActivity('🚀 Creating normal window...');
+            
+            try {
+                const result = await WindowTestService.CreateNormalWindow();
+                const endTime = performance.now();
+                logActivity(`✅ ${result} (${Math.round(endTime - startTime)}ms)`);
+            } catch (error) {
+                logActivity(`❌ Error creating normal window: ${error.message}`, true);
+            }
+        }
+
+        async function createDelayedContentWindow() {
+            const startTime = performance.now();
+            logActivity('⏳ Creating delayed content window...');
+            
+            try {
+                const result = await WindowTestService.CreateDelayedContentWindow();
+                const endTime = performance.now();
+                logActivity(`✅ ${result} (${Math.round(endTime - startTime)}ms)`);
+            } catch (error) {
+                logActivity(`❌ Error creating delayed content window: ${error.message}`, true);
+            }
+        }
+
+        async function createHiddenThenShowWindow() {
+            const startTime = performance.now();
+            logActivity('🔄 Creating hidden then show window...');
+            
+            try {
+                const result = await WindowTestService.CreateHiddenThenShowWindow();
+                const endTime = performance.now();
+                logActivity(`✅ ${result} (${Math.round(endTime - startTime)}ms)`);
+                logActivity('⏰ Watch for window to appear in 2 seconds...');
+            } catch (error) {
+                logActivity(`❌ Error creating hidden then show window: ${error.message}`, true);
+            }
+        }
+
+        async function createMultipleWindows() {
+            const startTime = performance.now();
+            logActivity('🔢 Creating multiple windows...');
+            
+            try {
+                const result = await WindowTestService.CreateMultipleWindows();
+                const endTime = performance.now();
+                logActivity(`✅ ${result} (${Math.round(endTime - startTime)}ms)`);
+            } catch (error) {
+                logActivity(`❌ Error creating multiple windows: ${error.message}`, true);
+            }
+        }
+
+        async function createEfficiencyModeTestWindow() {
+            const startTime = performance.now();
+            logActivity('🎯 Creating efficiency mode test window...');
+            
+            try {
+                const result = await WindowTestService.CreateEfficiencyModeTestWindow();
+                const endTime = performance.now();
+                logActivity(`✅ ${result} (${Math.round(endTime - startTime)}ms)`);
+                logActivity('🔍 Check: Did the window appear immediately?');
+            } catch (error) {
+                logActivity(`❌ Error creating efficiency mode test window: ${error.message}`, true);
+            }
+        }
+
+        async function rapidWindowCreation() {
+            logActivity('🚄 Starting rapid window creation test...');
+            
+            for (let i = 0; i < 3; i++) {
+                setTimeout(async () => {
+                    try {
+                        await createNormalWindow();
+                        logActivity(`✅ Rapid window ${i + 1} created`);
+                    } catch (error) {
+                        logActivity(`❌ Rapid window ${i + 1} failed: ${error.message}`, true);
+                    }
+                }, i * 200); // 200ms intervals
+            }
+        }
+
+        // Make functions globally available for onclick handlers
+        window.createNormalWindow = createNormalWindow;
+        window.createDelayedContentWindow = createDelayedContentWindow;
+        window.createHiddenThenShowWindow = createHiddenThenShowWindow;
+        window.createMultipleWindows = createMultipleWindows;
+        window.createEfficiencyModeTestWindow = createEfficiencyModeTestWindow;
+        window.rapidWindowCreation = rapidWindowCreation;
+
+        // Log when the page loads
+        window.addEventListener('load', function() {
+            logActivity('📱 Main window loaded and ready for testing');
+        });
+    </script>
+</body>
+</html>
--- a/v3/tests/window-visibility-test/go.mod
+++ b/v3/tests/window-visibility-test/go.mod
@ -0,0 +1,55 @@
+module window-visibility-test
+
+go 1.24.0
+
+toolchain go1.24.4
+
+replace github.com/wailsapp/wails/v3 => ../../
+
+require github.com/wailsapp/wails/v3 v3.0.0-alpha.0
+
+require (
+	dario.cat/mergo v1.0.1 // indirect
+	github.com/Microsoft/go-winio v0.6.2 // indirect
+	github.com/ProtonMail/go-crypto v1.1.6 // indirect
+	github.com/adrg/xdg v0.5.3 // indirect
+	github.com/bep/debounce v1.2.1 // indirect
+	github.com/cloudflare/circl v1.6.0 // indirect
+	github.com/cyphar/filepath-securejoin v0.4.1 // indirect
+	github.com/ebitengine/purego v0.8.2 // indirect
+	github.com/emirpasic/gods v1.18.1 // indirect
+	github.com/go-git/gcfg v1.5.1-0.20230307220236-3a3c6141e376 // indirect
+	github.com/go-git/go-billy/v5 v5.6.2 // indirect
+	github.com/go-git/go-git/v5 v5.13.2 // indirect
+	github.com/go-ole/go-ole v1.3.0 // indirect
+	github.com/godbus/dbus/v5 v5.1.0 // indirect
+	github.com/golang/groupcache v0.0.0-20241129210726-2c02b8208cf8 // indirect
+	github.com/google/uuid v1.6.0 // indirect
+	github.com/jbenet/go-context v0.0.0-20150711004518-d14ea06fba99 // indirect
+	github.com/jchv/go-winloader v0.0.0-20210711035445-715c2860da7e // indirect
+	github.com/kevinburke/ssh_config v1.2.0 // indirect
+	github.com/leaanthony/go-ansi-parser v1.6.1 // indirect
+	github.com/leaanthony/u v1.1.1 // indirect
+	github.com/lmittmann/tint v1.0.7 // indirect
+	github.com/mattn/go-colorable v0.1.14 // indirect
+	github.com/mattn/go-isatty v0.0.20 // indirect
+	github.com/pjbgf/sha1cd v0.3.2 // indirect
+	github.com/pkg/browser v0.0.0-20240102092130-5ac0b6a4141c // indirect
+	github.com/pkg/errors v0.9.1 // indirect
+	github.com/rivo/uniseg v0.4.7 // indirect
+	github.com/samber/lo v1.49.1 // indirect
+	github.com/sergi/go-diff v1.3.2-0.20230802210424-5b0b94c5c0d3 // indirect
+	github.com/skeema/knownhosts v1.3.1 // indirect
+	github.com/wailsapp/go-webview2 v1.0.21 // indirect
+	github.com/wailsapp/mimetype v1.4.1 // indirect
+	github.com/xanzy/ssh-agent v0.3.3 // indirect
+	golang.org/x/crypto v0.36.0 // indirect
+	golang.org/x/net v0.37.0 // indirect
+	golang.org/x/sys v0.31.0 // indirect
+	golang.org/x/text v0.23.0 // indirect
+	gopkg.in/ini.v1 v1.67.0 // indirect
+	gopkg.in/warnings.v0 v0.1.2 // indirect
+)
+
+// Add any other dependencies that might be needed
+// These will be resolved when the user runs go mod tidy
--- a/v3/tests/window-visibility-test/go.sum
+++ b/v3/tests/window-visibility-test/go.sum
@ -0,0 +1,146 @@
+dario.cat/mergo v1.0.1 h1:Ra4+bf83h2ztPIQYNP99R6m+Y7KfnARDfID+a+vLl4s=
+dario.cat/mergo v1.0.1/go.mod h1:uNxQE+84aUszobStD9th8a29P2fMDhsBdgRYvZOxGmk=
+github.com/Microsoft/go-winio v0.5.2/go.mod h1:WpS1mjBmmwHBEWmogvA2mj8546UReBk4v8QkMxJ6pZY=
+github.com/Microsoft/go-winio v0.6.2 h1:F2VQgta7ecxGYO8k3ZZz3RS8fVIXVxONVUPlNERoyfY=
+github.com/Microsoft/go-winio v0.6.2/go.mod h1:yd8OoFMLzJbo9gZq8j5qaps8bJ9aShtEA8Ipt1oGCvU=
+github.com/ProtonMail/go-crypto v1.1.6 h1:ZcV+Ropw6Qn0AX9brlQLAUXfqLBc7Bl+f/DmNxpLfdw=
+github.com/ProtonMail/go-crypto v1.1.6/go.mod h1:rA3QumHc/FZ8pAHreoekgiAbzpNsfQAosU5td4SnOrE=
+github.com/adrg/xdg v0.5.3 h1:xRnxJXne7+oWDatRhR1JLnvuccuIeCoBu2rtuLqQB78=
+github.com/adrg/xdg v0.5.3/go.mod h1:nlTsY+NNiCBGCK2tpm09vRqfVzrc2fLmXGpBLF0zlTQ=
+github.com/anmitsu/go-shlex v0.0.0-20200514113438-38f4b401e2be h1:9AeTilPcZAjCFIImctFaOjnTIavg87rW78vTPkQqLI8=
+github.com/anmitsu/go-shlex v0.0.0-20200514113438-38f4b401e2be/go.mod h1:ySMOLuWl6zY27l47sB3qLNK6tF2fkHG55UZxx8oIVo4=
+github.com/armon/go-socks5 v0.0.0-20160902184237-e75332964ef5 h1:0CwZNZbxp69SHPdPJAN/hZIm0C4OItdklCFmMRWYpio=
+github.com/armon/go-socks5 v0.0.0-20160902184237-e75332964ef5/go.mod h1:wHh0iHkYZB8zMSxRWpUBQtwG5a7fFgvEO+odwuTv2gs=
+github.com/bep/debounce v1.2.1 h1:v67fRdBA9UQu2NhLFXrSg0Brw7CexQekrBwDMM8bzeY=
+github.com/bep/debounce v1.2.1/go.mod h1:H8yggRPQKLUhUoqrJC1bO2xNya7vanpDl7xR3ISbCJ0=
+github.com/cloudflare/circl v1.6.0 h1:cr5JKic4HI+LkINy2lg3W2jF8sHCVTBncJr5gIIq7qk=
+github.com/cloudflare/circl v1.6.0/go.mod h1:uddAzsPgqdMAYatqJ0lsjX1oECcQLIlRpzZh3pJrofs=
+github.com/cyphar/filepath-securejoin v0.4.1 h1:JyxxyPEaktOD+GAnqIqTf9A8tHyAG22rowi7HkoSU1s=
+github.com/cyphar/filepath-securejoin v0.4.1/go.mod h1:Sdj7gXlvMcPZsbhwhQ33GguGLDGQL7h7bg04C/+u9jI=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/ebitengine/purego v0.8.2 h1:jPPGWs2sZ1UgOSgD2bClL0MJIqu58nOmIcBuXr62z1I=
+github.com/ebitengine/purego v0.8.2/go.mod h1:iIjxzd6CiRiOG0UyXP+V1+jWqUXVjPKLAI0mRfJZTmQ=
+github.com/elazarl/goproxy v1.4.0 h1:4GyuSbFa+s26+3rmYNSuUVsx+HgPrV1bk1jXI0l9wjM=
+github.com/elazarl/goproxy v1.4.0/go.mod h1:X/5W/t+gzDyLfHW4DrMdpjqYjpXsURlBt9lpBDxZZZQ=
+github.com/emirpasic/gods v1.18.1 h1:FXtiHYKDGKCW2KzwZKx0iC0PQmdlorYgdFG9jPXJ1Bc=
+github.com/emirpasic/gods v1.18.1/go.mod h1:8tpGGwCnJ5H4r6BWwaV6OrWmMoPhUl5jm/FMNAnJvWQ=
+github.com/gliderlabs/ssh v0.3.8 h1:a4YXD1V7xMF9g5nTkdfnja3Sxy1PVDCj1Zg4Wb8vY6c=
+github.com/gliderlabs/ssh v0.3.8/go.mod h1:xYoytBv1sV0aL3CavoDuJIQNURXkkfPA/wxQ1pL1fAU=
+github.com/go-git/gcfg v1.5.1-0.20230307220236-3a3c6141e376 h1:+zs/tPmkDkHx3U66DAb0lQFJrpS6731Oaa12ikc+DiI=
+github.com/go-git/gcfg v1.5.1-0.20230307220236-3a3c6141e376/go.mod h1:an3vInlBmSxCcxctByoQdvwPiA7DTK7jaaFDBTtu0ic=
+github.com/go-git/go-billy/v5 v5.6.2 h1:6Q86EsPXMa7c3YZ3aLAQsMA0VlWmy43r6FHqa/UNbRM=
+github.com/go-git/go-billy/v5 v5.6.2/go.mod h1:rcFC2rAsp/erv7CMz9GczHcuD0D32fWzH+MJAU+jaUU=
+github.com/go-git/go-git-fixtures/v4 v4.3.2-0.20231010084843-55a94097c399 h1:eMje31YglSBqCdIqdhKBW8lokaMrL3uTkpGYlE2OOT4=
+github.com/go-git/go-git-fixtures/v4 v4.3.2-0.20231010084843-55a94097c399/go.mod h1:1OCfN199q1Jm3HZlxleg+Dw/mwps2Wbk9frAWm+4FII=
+github.com/go-git/go-git/v5 v5.13.2 h1:7O7xvsK7K+rZPKW6AQR1YyNhfywkv7B8/FsP3ki6Zv0=
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--- a/v3/tests/window-visibility-test/main.go
+++ b/v3/tests/window-visibility-test/main.go
@ -0,0 +1,308 @@
+package main
+
+import (
+	"embed"
+	"fmt"
+	"log"
+	"time"
+
+	"github.com/wailsapp/wails/v3/pkg/application"
+)
+
+// WindowTestService provides methods for testing window visibility scenarios
+type WindowTestService struct {
+	app *application.App
+}
+
+// NewWindowTestService creates a new window test service
+func NewWindowTestService() *WindowTestService {
+	return &WindowTestService{}
+}
+
+// SetApp sets the application reference (internal method, not exposed to frontend)
+func (w *WindowTestService) setApp(app *application.App) {
+	w.app = app
+}
+
+// CreateNormalWindow creates a standard window - should show immediately
+func (w *WindowTestService) CreateNormalWindow() string {
+	log.Println("Creating normal window...")
+
+	w.app.NewWebviewWindowWithOptions(application.WebviewWindowOptions{
+		Title:  "Normal Window - Should Show Immediately",
+		Width:  600,
+		Height: 400,
+		X:      100,
+		Y:      100,
+		HTML:   "<html><head><title>Normal Window</title><style>body{font-family:Arial,sans-serif;padding:20px;background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);color:white;}</style></head><body><h1>✅ Normal Window</h1><p>This window should have appeared immediately after clicking the button.</p><p>Timestamp: " + time.Now().Format("15:04:05") + "</p></body></html>",
+	})
+
+	return "Normal window created"
+}
+
+// CreateDelayedContentWindow creates a window with delayed content to test navigation timing
+func (w *WindowTestService) CreateDelayedContentWindow() string {
+	log.Println("Creating delayed content window...")
+
+	// Use HTML that will take time to load (simulates heavy Vue app)
+	delayedHTML := `
+	<html>
+	<head>
+		<title>Delayed Content</title>
+		<style>
+			body { font-family: Arial, sans-serif; padding: 20px; background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%); color: white; }
+			.spinner { border: 4px solid #f3f3f3; border-top: 4px solid #3498db; border-radius: 50%; width: 40px; height: 40px; animation: spin 2s linear infinite; margin: 20px auto; }
+			@keyframes spin { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }
+		</style>
+	</head>
+	<body>
+		<h1>⏳ Delayed Content Window</h1>
+		<p>This window tests navigation completion timing.</p>
+		<div class="spinner"></div>
+		<p>Loading... (simulates heavy content)</p>
+		<script>
+			// Simulate slow loading content
+			setTimeout(function() {
+				document.querySelector('.spinner').style.display = 'none';
+				document.body.innerHTML += '<h2>✅ Content Loaded!</h2><p>Navigation completed at: ' + new Date().toLocaleTimeString() + '</p>';
+			}, 3000);
+		</script>
+		<p>Window container should be visible immediately, even during load.</p>
+	</body>
+	</html>`
+
+	w.app.NewWebviewWindowWithOptions(application.WebviewWindowOptions{
+		Title:  "Delayed Content Window - Test Navigation Timing",
+		Width:  600,
+		Height: 400,
+		X:      150,
+		Y:      150,
+		HTML:   delayedHTML,
+	})
+
+	return "Delayed content window created"
+}
+
+// CreateHiddenThenShowWindow creates a hidden window then shows it after delay
+func (w *WindowTestService) CreateHiddenThenShowWindow() string {
+	log.Println("Creating hidden then show window...")
+
+	window := w.app.NewWebviewWindowWithOptions(application.WebviewWindowOptions{
+		Title:  "Hidden Then Show Window - Test Show() Robustness",
+		Width:  600,
+		Height: 400,
+		X:      200,
+		Y:      200,
+		HTML:   "<html><head><title>Hidden Then Show</title><style>body{font-family:Arial,sans-serif;padding:20px;background:linear-gradient(135deg,#a8edea 0%,#fed6e3 100%);color:#333;}</style></head><body><h1>🔄 Hidden Then Show Window</h1><p>This window was created hidden and then shown after 2 seconds.</p><p>Should test the robustness of the show() method.</p><p>Created at: " + time.Now().Format("15:04:05") + "</p></body></html>",
+		Hidden: true, // Start hidden
+	})
+
+	// Show after 2 seconds to test delayed showing
+	go func() {
+		time.Sleep(2 * time.Second)
+		log.Println("Showing previously hidden window...")
+		window.Show()
+	}()
+
+	return "Hidden window created, will show in 2 seconds"
+}
+
+// CreateMultipleWindows creates multiple windows simultaneously to test performance
+func (w *WindowTestService) CreateMultipleWindows() string {
+	log.Println("Creating multiple windows...")
+
+	for i := 0; i < 3; i++ {
+		bgColors := []string{"#ff9a9e,#fecfef", "#a18cd1,#fbc2eb", "#fad0c4,#ffd1ff"}
+		content := fmt.Sprintf(`
+		<html>
+		<head>
+			<title>Batch Window %d</title>
+			<style>
+				body { font-family: Arial, sans-serif; padding: 20px; background: linear-gradient(135deg, %s); color: #333; text-align: center; }
+			</style>
+		</head>
+		<body>
+			<h1>🔢 Batch Window %d</h1>
+			<p>Part of multiple windows stress test</p>
+			<p>All windows should appear quickly and simultaneously</p>
+			<p>Created at: %s</p>
+		</body>
+		</html>`, i+1, bgColors[i], i+1, time.Now().Format("15:04:05"))
+
+		w.app.NewWebviewWindowWithOptions(application.WebviewWindowOptions{
+			Title:  fmt.Sprintf("Batch Window %d - Stress Test", i+1),
+			Width:  400,
+			Height: 300,
+			X:      250 + (i * 50),
+			Y:      250 + (i * 50),
+			HTML:   content,
+		})
+	}
+
+	return "Created 3 windows simultaneously"
+}
+
+// CreateEfficiencyModeTestWindow creates a window designed to trigger efficiency mode issues
+func (w *WindowTestService) CreateEfficiencyModeTestWindow() string {
+	log.Println("Creating efficiency mode test window...")
+
+	// Create content that might trigger efficiency mode or WebView2 delays
+	heavyHTML := `
+	<html>
+	<head>
+		<title>Efficiency Mode Test</title>
+		<style>
+			body { font-family: Arial, sans-serif; padding: 20px; background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); color: white; }
+			.test-section { margin: 20px 0; padding: 15px; background: rgba(255,255,255,0.1); border-radius: 8px; }
+			.heavy-content { height: 200px; overflow-y: scroll; background: rgba(0,0,0,0.2); padding: 10px; border-radius: 4px; }
+		</style>
+	</head>
+	<body>
+		<h1>⚡ Efficiency Mode Test Window</h1>
+		<p>This window tests the fix for Windows 10 Pro efficiency mode issue #2861</p>
+		
+		<div class="test-section">
+			<h3>Window Container Status</h3>
+			<p id="container-status">✅ Window container is visible (this text proves it)</p>
+		</div>
+		
+		<div class="test-section">
+			<h3>WebView2 Status</h3>
+			<p id="webview-status">⏳ WebView2 navigation in progress...</p>
+			<p id="navigation-time"></p>
+		</div>
+		
+		<div class="test-section">
+			<h3>Heavy Content (simulates Vue.js app)</h3>
+			<div class="heavy-content" id="heavy-content">
+				Loading heavy content...
+			</div>
+		</div>
+		
+		<script>
+			// Track navigation completion
+			var startTime = performance.now();
+			document.getElementById('navigation-time').textContent = 'Navigation started at: ' + new Date().toLocaleTimeString();
+			
+			// Simulate heavy JavaScript processing
+			function heavyProcessing() {
+				var content = '';
+				for (var i = 0; i < 1000; i++) {
+					content += 'Line ' + i + ': Simulated heavy content processing...<br>';
+				}
+				document.getElementById('heavy-content').innerHTML = content;
+			}
+			
+			// Simulate WebView2 navigation completion with delay
+			setTimeout(function() {
+				document.getElementById('webview-status').innerHTML = '✅ WebView2 navigation completed successfully';
+				var endTime = performance.now();
+				document.getElementById('navigation-time').innerHTML += '<br>Navigation completed at: ' + new Date().toLocaleTimeString() + 
+					'<br>Total time: ' + Math.round(endTime - startTime) + 'ms';
+				heavyProcessing();
+			}, 2000);
+			
+			console.log('Window created at:', new Date().toLocaleTimeString());
+		</script>
+	</body>
+	</html>`
+
+	w.app.NewWebviewWindowWithOptions(application.WebviewWindowOptions{
+		Title:  "Efficiency Mode Test - Issue #2861 Reproduction",
+		Width:  700,
+		Height: 500,
+		X:      300,
+		Y:      300,
+		HTML:   heavyHTML,
+	})
+
+	return "Efficiency mode test window created"
+}
+
+// GetWindowCount returns the current number of windows
+func (w *WindowTestService) GetWindowCount() int {
+	// This would need to be implemented based on the app's window tracking
+	// For now, return a placeholder
+	return 1 // Main window
+}
+
+//go:embed assets/*
+var assets embed.FS
+
+func main() {
+	// Create the service
+	service := NewWindowTestService()
+
+	// Create application with menu
+	app := application.New(application.Options{
+		Name:        "Window Visibility Test",
+		Description: "Test application for window visibility robustness (Issue #2861)",
+		Services: []application.Service{
+			application.NewService(service),
+		},
+		Assets: application.AssetOptions{
+			Handler: application.BundledAssetFileServer(assets),
+		},
+	})
+
+	// Set app reference in service
+	service.setApp(app)
+
+	// Create application menu
+	menu := app.NewMenu()
+
+	// File menu
+	fileMenu := menu.AddSubmenu("File")
+	fileMenu.Add("New Normal Window").OnClick(func(ctx *application.Context) {
+		service.CreateNormalWindow()
+	})
+	fileMenu.Add("New Delayed Content Window").OnClick(func(ctx *application.Context) {
+		service.CreateDelayedContentWindow()
+	})
+	fileMenu.AddSeparator()
+	fileMenu.Add("Quit").OnClick(func(ctx *application.Context) {
+		app.Quit()
+	})
+
+	// Test menu
+	testMenu := menu.AddSubmenu("Tests")
+	testMenu.Add("Hidden Then Show Window").OnClick(func(ctx *application.Context) {
+		service.CreateHiddenThenShowWindow()
+	})
+	testMenu.Add("Multiple Windows Stress Test").OnClick(func(ctx *application.Context) {
+		service.CreateMultipleWindows()
+	})
+	testMenu.Add("Efficiency Mode Test").OnClick(func(ctx *application.Context) {
+		service.CreateEfficiencyModeTestWindow()
+	})
+
+	// Help menu
+	helpMenu := menu.AddSubmenu("Help")
+	helpMenu.Add("About").OnClick(func(ctx *application.Context) {
+		app.NewWebviewWindowWithOptions(application.WebviewWindowOptions{
+			Title:  "About Window Visibility Test",
+			Width:  500,
+			Height: 400,
+			X:      400,
+			Y:      300,
+			HTML:   "<html><head><title>About</title><style>body{font-family:Arial,sans-serif;padding:20px;background:#f0f0f0;color:#333;text-align:center;}</style></head><body><h1>Window Visibility Test</h1><p>This application tests the fixes for Wails v3 issue #2861</p><p><strong>Windows 10 Pro Efficiency Mode Fix</strong></p><p>Tests window container vs WebView content visibility</p><hr><p><em>Created for testing robust window visibility patterns</em></p></body></html>",
+		})
+	})
+
+	app.SetMenu(menu)
+
+	// Create main window
+	app.NewWebviewWindowWithOptions(application.WebviewWindowOptions{
+		Title:  "Window Visibility Test - Issue #2861",
+		Width:  800,
+		Height: 600,
+		X:      50,
+		Y:      50,
+		URL:    "/index.html",
+	})
+
+	err := app.Run()
+	if err != nil {
+		log.Fatal(err)
+	}
+}