A description about Loader is not clear enough

 it could also directly call any function defined in the Loader or its parent Item. 

// Main.qml
import QtQuick
Window {
    width: 640
    height: 480
    visible: true
    title: qsTr("Hello World")    
    Item {
        id: itm
        width: 200; height: 200
        function helloItem() {
            console.log("hello from Item")
        }       
        Loader {
            x: 50
            function hello() {
                console.log("hello from Loader")
            }
            source: "Loded.qml"
        }
    }
} 

import QtQuick
Rectangle {     
    width: 100
    height: 100     
    color: "red"     
    x: 150     
    Component.onCompleted: {         
       hello()         
       helloItem()     
    } 
}

// output
qml: hello from Loader
qrc:/loaderAnchorTest/Loded.qml:10: ReferenceError: helloItem is not defined