How to make Loader's component the parent of some QtQuick' object?

Code:

---

import QtQuick 2.8
    import QtQuick.Window 2.2
 
    import QtQuick.Layouts 1.1
    import QtQuick.Controls 1.4
    import QtQuick.Controls 2.1
 
    Window
    {
        id: head
        visible: true
        width: 640
        height: 480
        title: qsTr("Hello World")
 
        Loader
        {
            id: loader
         }
 
         Component
         {
              id: rect
 
              Window
              {
                  id: ppp
 
                  visible: true
                  width: 164
                  height: 148
                  title: qsTr("Hello World")
              }
         }
 
        Rectangle
        {
            anchors.fill: parent
            color: "blue"
            Rectangle
            {
                id: leftArea
 
                height: 100
                width:  100
                color: "red"
 
                MouseArea
                {
                    anchors.fill: parent
                    onClicked:
                    {
                        loader.sourceComponent = rect
                        leftArea.parent = loader
                    }
                }
            }
       }

---

When I click on that rectangle, it disapears but it doesn't get shown in the loader's window.
Moreover when I maximize the new resultant window the GUI hangs.

Aim is to make the new Loader's window the parent of the rectangle on click.