diff --git a/tests/manual/wasm/CMakeLists.txt b/tests/manual/wasm/CMakeLists.txt
index b13f6781b86..f2997937d7b 100644
--- a/tests/manual/wasm/CMakeLists.txt
+++ b/tests/manual/wasm/CMakeLists.txt
@@ -10,4 +10,5 @@ add_subdirectory(localfiles)
 add_subdirectory(localfonts)
 add_subdirectory(qstdweb)
 add_subdirectory(clipboard)
+add_subdirectory(windowmanagement)
 endif()
diff --git a/tests/manual/wasm/windowmanagement/CMakeLists.txt b/tests/manual/wasm/windowmanagement/CMakeLists.txt
new file mode 100644
index 00000000000..76b7832a17e
--- /dev/null
+++ b/tests/manual/wasm/windowmanagement/CMakeLists.txt
@@ -0,0 +1,12 @@
+# Copyright (C) 2022 The Qt Company Ltd.
+# SPDX-License-Identifier: BSD-3-Clause
+
+qt_internal_add_manual_test(windowmanagement
+    GUI
+    SOURCES
+        main.cpp
+    LIBRARIES
+        Qt::Core
+        Qt::Gui
+        Qt::Widgets
+)
diff --git a/tests/manual/wasm/windowmanagement/main.cpp b/tests/manual/wasm/windowmanagement/main.cpp
new file mode 100644
index 00000000000..f5bb8a018bd
--- /dev/null
+++ b/tests/manual/wasm/windowmanagement/main.cpp
@@ -0,0 +1,181 @@
+// Copyright (C) 2024 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
+#include <QtWidgets>
+
+class WindowManagedWindow: public QWidget
+{
+    Q_OBJECT
+public:
+    WindowManagedWindow(QWidget *parent = nullptr)
+    :QWidget(parent)
+    {
+        QVBoxLayout *layout = new QVBoxLayout();
+
+        // UI for controlling window show state
+        QHBoxLayout *showWindowLayout = new QHBoxLayout();
+        layout->addLayout(showWindowLayout);
+        QPushButton *showNormal = new QPushButton("Show Normal");
+        QPushButton *showFullscreen = new QPushButton("Show FullScreen");
+        QPushButton *showMaximized = new QPushButton("Show Maximized");
+        QPushButton *close = new QPushButton("Close");
+
+        showWindowLayout->addWidget(showNormal);
+        showWindowLayout->addWidget(showFullscreen);
+        showWindowLayout->addWidget(showMaximized);
+        showWindowLayout->addWidget(close);
+
+        connect(showNormal, &QPushButton::clicked, [=]() {
+            this->showNormal();
+        });
+        connect(showFullscreen, &QPushButton::clicked, [=]() {
+            this->showFullScreen();
+        });
+        connect(showMaximized, &QPushButton::clicked, [=]() {
+            this->showMaximized();
+        });
+        connect(close, &QPushButton::clicked, [=]() {
+            this->close();
+        });
+
+        // UI for adding a child window
+        QHBoxLayout *childWindowLayout = new QHBoxLayout();
+        layout->addLayout(childWindowLayout);        
+        QPushButton *showChild = new QPushButton("Add Child Window");
+        childWindowLayout->addWidget(showChild);
+        connect(showChild, &QPushButton::clicked, [=]() {
+            WindowManagedWindow *childWindow = new WindowManagedWindow(this);
+            childWindow->winId(); // ensure it has a QWindow
+            childWindow->setBackgroundColor("AliceBlue");
+            childWindowLayout->insertWidget(1, childWindow);
+            childWindow->show();
+        });
+        childWindowLayout->addStretch();
+
+        // UI for showing a transient child window
+        QHBoxLayout *transientChildWindowLayout = new QHBoxLayout();
+        layout->addLayout(transientChildWindowLayout);
+        QPushButton *showTransientChild = new QPushButton("Add Transient Child Window");
+        transientChildWindowLayout->addWidget(showTransientChild);
+        QRadioButton *modal = new QRadioButton("Modal Dialog");
+        transientChildWindowLayout->addWidget(modal);
+        QRadioButton *popup = new QRadioButton("Popup");
+        transientChildWindowLayout->addWidget(popup);
+        QButtonGroup *radioGroup = new QButtonGroup();
+        radioGroup->addButton(modal);
+        radioGroup->addButton(popup);
+        modal->setChecked(true);
+
+        connect(showTransientChild, &QPushButton::clicked, [this, modal]() {
+            WindowManagedWindow *transientChildWindow = new WindowManagedWindow();
+            transientChildWindow->winId();
+
+            if (modal->isChecked()) {
+                transientChildWindow->setWindowFlag(Qt::Dialog);
+                transientChildWindow->setWindowModality(Qt::WindowModal);
+                transientChildWindow->setBackgroundColor("MistyRose");
+            } else {
+                transientChildWindow->setWindowFlag(Qt::Popup);
+                transientChildWindow->setBackgroundColor("LavenderBlush");
+            }
+
+            transientChildWindow->windowHandle()->setTransientParent(this->windowHandle());
+            transientChildWindow->show();
+            
+        });
+        transientChildWindowLayout->addStretch();
+
+        // UI for adding a new top-level window
+        if (!parentWidget()) {
+            QHBoxLayout *addWindowLayout = new QHBoxLayout();
+            layout->addLayout(addWindowLayout);
+            QPushButton *addWindow = new QPushButton("Add Top-level Window");
+            QRadioButton *addNormal = new QRadioButton("Normal");
+            QRadioButton *addFullScreen = new QRadioButton("FullScreen");
+            QRadioButton *addMaximized = new QRadioButton("Maximized");
+
+            QButtonGroup *radioGroup = new QButtonGroup();
+            radioGroup->addButton(addNormal);
+            radioGroup->addButton(addFullScreen);
+            radioGroup->addButton(addMaximized);
+            addNormal->setChecked(true);
+
+            addWindowLayout->addWidget(addWindow);
+            addWindowLayout->addWidget(addNormal);
+            addWindowLayout->addWidget(addFullScreen);
+            addWindowLayout->addWidget(addMaximized);
+
+            connect(addWindow, &QPushButton::clicked, [=]() {
+                QWidget *newWindow = new WindowManagedWindow();
+                if (addNormal->isChecked()) {
+                    newWindow->showNormal();
+                } else if (addFullScreen->isChecked()) {
+                    newWindow->showFullScreen();
+                } else if (addMaximized->isChecked()) {
+                    newWindow->showMaximized();
+                }
+            });
+        }
+
+        // Test label
+        QHBoxLayout *labelLayout = new QHBoxLayout();
+        layout->addLayout(labelLayout);
+        labelLayout->addWidget(new QLabel("Test Text Input:"));
+        labelLayout->addWidget(new QLineEdit());
+        labelLayout->addSpacerItem(new QSpacerItem(20, 40, QSizePolicy::Minimum, QSizePolicy::Expanding));
+
+        setLayout(layout);
+
+        updateWindowFocusState();
+    }
+
+    void paintEvent(QPaintEvent *event) override
+    {
+        updateWindowFocusState(); // hacky update
+        QWidget::paintEvent(event);
+    }
+
+    void updateWindowFocusState()
+    {
+        QString title = QString("isActive: %1 Modal: %2")
+            .arg(isActiveWindow() ? "yes" : "no")
+            .arg(isModal() ? "yes" : "no");
+        setWindowTitle(title);
+    }
+
+    void setBackgroundColor(const QString &colorName)
+    {
+        QColor color(colorName);
+        if (!color.isValid()) {
+            qWarning("Invalid color name provided: %s", qPrintable(colorName));
+            return;
+        }
+        QPalette palette = this->palette();
+        palette.setColor(QPalette::Window, color);
+        this->setAutoFillBackground(true);
+        this->setPalette(palette);
+    }
+};
+
+int main(int argc, char **argv)
+{
+    // Limit native widgets to the WindowManagedWindow instances
+    QCoreApplication::setAttribute(Qt::AA_DontCreateNativeWidgetSiblings);
+
+    QApplication app(argc, argv);
+
+    QObject::connect(qApp, &QApplication::focusChanged, [](QWidget *oldWidget, QWidget *newWidget) {
+        if (oldWidget)
+            if (WindowManagedWindow *window = qobject_cast<WindowManagedWindow *>(oldWidget->window()))
+                window->updateWindowFocusState();
+        if (newWidget)
+            if (WindowManagedWindow *window = qobject_cast<WindowManagedWindow *>(newWidget->window()))
+                window->updateWindowFocusState();
+    });
+
+    WindowManagedWindow window;
+    window.showNormal();
+
+    return app.exec();
+}
+
+#include "main.moc"