installscript.js Example File

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

 function abortInstaller()
 {
     installer.setDefaultPageVisible(QInstaller.Introduction, false);
     installer.setDefaultPageVisible(QInstaller.TargetDirectory, false);
     installer.setDefaultPageVisible(QInstaller.ComponentSelection, false);
     installer.setDefaultPageVisible(QInstaller.ReadyForInstallation, false);
     installer.setDefaultPageVisible(QInstaller.StartMenuSelection, false);
     installer.setDefaultPageVisible(QInstaller.PerformInstallation, false);
     installer.setDefaultPageVisible(QInstaller.LicenseCheck, false);

     var abortText = "<font color='red' size=3>" + qsTr("Installation failed:") + "</font>";

     var error_list = installer.value("component_errors").split(";;;");
     abortText += "<ul>";
     // ignore the first empty one
     for (var i = 0; i < error_list.length; ++i) {
         if (error_list[i] !== "") {
             console.log(error_list[i]);
             abortText += "<li>" + error_list[i] + "</li>"
         }
     }
     abortText += "</ul>";
     installer.setValue("FinishedText", abortText);
 }

 function reactOnAbortInstallerChange()
 {
     if (installer.value("ComponentError") === "true")
         abortInstaller();
 }

 function Component()
 {
     installer.finishAllComponentsReset.connect(reactOnAbortInstallerChange);
 }