Qml list disappeare and not visible sometimes

[MostafaEzzat]

I have this code here to implement simple Qml List as an example from QMl reference.
The list doesn't appear at all.
b394413d-2ed5-4728-b0f5-2dc59716c521-image.png

This's the code

import QtQuick 2.12
import QtQuick.Window 2.12
import QtQuick.Controls 2.15

Window {
    width: 640
    height: 480
    visible: true
    title: qsTr("Hello World")


    ListModel {
        ListElement {
            name: "Bill Smith"
            number: "555 3264"
        }
        ListElement {
            name: "John Brown"
            number: "555 8426"
        }
        ListElement {
            name: "Sam Wise"
            number: "555 0473"
        }
    }
}

The list I want to do is this one. but the begining not even working.

The list I want to do

[Markkyboy]

You're not setting a ListView to display the ListModel, see here for answer;

https://forum.qt.io/topic/134573/simple-listmodel-example