installscript.js Example File

 /* Copyright (C) 2026 The Qt Company Ltd.
  *
  * SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
 */

 var ComponentSelectionPage = null;

 var Dir = new function () {
     this.toNativeSparator = function (path) {
         if (systemInfo.productType === "windows")
             return path.replace(/\//g, '\\');
         return path;
     }
 };

 function Component() {
     if (installer.isInstaller()) {
         component.loaded.connect(this, Component.prototype.installerLoaded);
         ComponentSelectionPage = gui.pageById(QInstaller.ComponentSelection);

         installer.setDefaultPageVisible(QInstaller.TargetDirectory, false);
         installer.setDefaultPageVisible(QInstaller.ComponentSelection, false);
         installer.setDefaultPageVisible(QInstaller.LicenseCheck, false);
         if (systemInfo.productType === "windows")
             installer.setDefaultPageVisible(QInstaller.StartMenuSelection, false);
         installer.setDefaultPageVisible(QInstaller.ReadyForInstallation, false);
     }
 }

 Component.prototype.installerLoaded = function () {
     if (installer.addWizardPage(component, "TargetWidget", QInstaller.TargetDirectory)) {
         var widget = gui.pageWidgetByObjectName("DynamicTargetWidget");
         if (widget != null) {
             widget.targetChooser.clicked.connect(this, Component.prototype.chooseTarget);
             widget.targetDirectory.textChanged.connect(this, Component.prototype.targetChanged);

             widget.windowTitle = "Installation Folder";
             widget.targetDirectory.text = Dir.toNativeSparator(installer.value("TargetDir"));
         }
     }

     if (installer.addWizardPage(component, "InstallationWidget", QInstaller.ComponentSelection)) {
         var widget = gui.pageWidgetByObjectName("DynamicInstallationWidget");
         if (widget != null) {
             widget.customInstall.toggled.connect(this, Component.prototype.customInstallToggled);
             widget.defaultInstall.toggled.connect(this, Component.prototype.defaultInstallToggled);
             widget.completeInstall.toggled.connect(this, Component.prototype.completeInstallToggled);

             widget.defaultInstall.checked = true;
             widget.windowTitle = "Select Installation Type";
         }

         if (installer.addWizardPage(component, "LicenseWidget", QInstaller.LicenseCheck)) {
             var widget = gui.pageWidgetByObjectName("DynamicLicenseWidget");
             if (widget != null) {
                 widget.acceptLicense.toggled.connect(this, Component.prototype.checkAccepted);

                 widget.complete = false;
                 widget.declineLicense.checked = true;
                 widget.windowTitle = "License Agreement";
             }
         }

         if (installer.addWizardPage(component, "ReadyToInstallWidget", QInstaller.ReadyForInstallation)) {
             var widget = gui.pageWidgetByObjectName("DynamicReadyToInstallWidget");
             if (widget != null) {
                 widget.showDetails.checked = false;
                 widget.windowTitle = "Ready to Install";
             }
             var page = gui.pageByObjectName("DynamicReadyToInstallWidget");
             if (page != null) {
                 page.entered.connect(this, Component.prototype.readyToInstallWidgetEntered);
             }
         }
     }
 }

 Component.prototype.targetChanged = function (text) {
     var widget = gui.pageWidgetByObjectName("DynamicTargetWidget");
     if (widget != null) {
         if (text != "") {
             if (!installer.fileExists(text + "/components.xml")) {
                 widget.complete = true;
                 installer.setValue("TargetDir", text);
                 return;
             }
         }
         widget.complete = false;
     }
 }

 Component.prototype.chooseTarget = function () {
     var widget = gui.pageWidgetByObjectName("DynamicTargetWidget");
     if (widget != null) {
         var newTarget = QFileDialog.getExistingDirectory("Choose your target directory.", widget
             .targetDirectory.text);
         if (newTarget != "")
             widget.targetDirectory.text = Dir.toNativeSparator(newTarget);
     }
 }

 Component.prototype.customInstallToggled = function (checked) {
     if (checked) {
         if (ComponentSelectionPage != null)
             ComponentSelectionPage.selectDefault();
         installer.setDefaultPageVisible(QInstaller.ComponentSelection, true);
     }
 }

 Component.prototype.defaultInstallToggled = function (checked) {
     if (checked) {
         if (ComponentSelectionPage != null)
             ComponentSelectionPage.selectDefault();
         installer.setDefaultPageVisible(QInstaller.ComponentSelection, false);
     }
 }

 Component.prototype.completeInstallToggled = function (checked) {
     if (checked) {
         if (ComponentSelectionPage != null)
             ComponentSelectionPage.selectAll();
         installer.setDefaultPageVisible(QInstaller.ComponentSelection, false);
     }
 }

 Component.prototype.checkAccepted = function (checked) {
     var widget = gui.pageWidgetByObjectName("DynamicLicenseWidget");
     if (widget != null)
         widget.complete = checked;
 }

 Component.prototype.readyToInstallWidgetEntered = function () {
     var widget = gui.pageWidgetByObjectName("DynamicReadyToInstallWidget");
     if (widget != null) {
         var html = "<b>Components to install:</b><ul>";
         var components = installer.components();
         for (i = 0; i < components.length; ++i) {
             if (components[i].installationRequested())
                 html = html + "<li>" + components[i].displayName + "</li>"
         }
         html = html + "</ul>";
         widget.showDetailsBrowser.html = html;
     }
 }