import QtQuick 1.0 import Qt.test 1.0 Item { id: first property bool loaderSourceComponentIsUndefined: false property alias sourceComponentAlias: loader.sourceComponent Component { id: redSquare Rectangle { color: "red"; width: 10; height: 10 } } Loader { id: loader sourceComponent: redSquare } function resetAlias() { sourceComponentAlias = undefined; loaderSourceComponentIsUndefined = (loader.sourceComponent == undefined); } }