The code snippet in the PathQuad documentation doesn't work as it is.

doc link : https://doc.qt.io/QtForMCUs-2.4/qml-qtquick-pathquad.html

The document above has a code snippet below:

Path {
    startX: 0; startY: 0
    PathQuad { x: 200; y: 0; controlX: 100; controlY: 150 }
}

But since this code uses Path, which is invisible, if the reader copies and pastes this code to their Qt Creator and runs the app, it won't draw a line in the Window.

I suggest replacing the current code snippet with this one, with a note saying the reader should link the Qul::Shapes module to their project to import QtQuick.Shapes.

import QtQuick 2.0
import QtQuick.Shapes
Rectangle {
    width: 300
    height: 300
    Shape {
        ShapePath {
            strokeColor: "black"
            startX: 0; startY: 0
            PathQuad { x: 200; y: 0; controlX: 100; controlY: 150 }
        }
    }
}

This code outputs this result: