import QtQuick 2.9
import QtQuick.Controls 2.2

ApplicationWindow {
    visible: true
    title: "Test"
    width: 800
    height: 800

    Loader {
        id: loader
    }

    Button {
        text: "Toggle"
        onClicked: {
            if (loader.source != "") {
                loader.source = "";
            } else {
                loader.source = "type.qml";
            }
        }
    }
}