The code creates a simple Qt application that displays a window with three buttons arranged horizontally using a QHBoxLayout. The application runs until the user closes the window, at which point the event loop ends and the application terminates.
The textQtApp function asynchronously imports the 'qt qml widget' module and calls its main function with arguments 0 and an empty string. This function is then exported as a module, relying on the importer object to handle module imports.
The code initializes a Qt application by loading a QML string that describes a simple rectangle with a button, and then creates a QQuickWidget to host the QML content. The application is executed, and an alternative method is also demonstrated where the QML content is loaded from a data URL using the setSource function of the QQuickWidget.