import QtQuick 2.0 Rectangle { id: rectangle // will have JS ownership objectName: "rectangle" width: 10 height: 10 property var rectCanary: 5 Text { id: textOne // will have Eventual-JS ownership objectName: "textOne" property var textCanary: 11 property var vp } Text { id: textTwo objectName: "textTwo" property var textCanary: 12 property var vp function constructQObject() { var component = Qt.createComponent("PropertyVarCircularComponent5.qml"); if (component.status == Component.Ready) { textTwo.vp = component.createObject(null); // has JavaScript ownership } gc(); } function deassignVp() { textTwo.textCanary = 22; textTwo.vp = textTwo.textCanary; } } }