<div id="diagram"></div>
<script>
var diagram = $("#diagram").kendoDiagram({
    shapes: [{
        type: "rectangle",
        x: 100,
        y: 100,
        width: 200,
        height: 100,
        fill: {
            color: "#ff6358"
        }
    }]
}).getKendoDiagram();

var rectangle = diagram.shapes[0];
var element = rectangle.drawingElement;
console.log("Drawing element:", element);
</script>