<style>
    html, body {
        margin: 0;
        padding: 0;
    }
    svg { 
        overflow: visible;
        width: 100px;
        height: 100px;
    }
    div {
        position: absolute;
        left: 200px;
        width: 100px;
        height: 100px;
        background-color: green;
        z-index: 1;
    }
</style>
<body>
    <div></div>
    <svg>
        <rect x="100"width="100" height="100" fill="red"/>
        <rect x="200"width="100" height="100" fill="blue"/>
    </svg>
    <script>
        function moveSVGElement(element, x, y) {
            element.setAttribute('x', x);
            element.setAttribute('y', y);
        }

        function moveHTMLElement(rect, x, y) {
            element.style.left = x + 'px';
            element.style.top = y + 'px';
        }

        var element = document.elementFromPoint(150, 50);
        if (element instanceof SVGRectElement)
            moveSVGElement(element, 0, 0);

        element = document.elementFromPoint(250, 50);
        if (element instanceof HTMLDivElement)
            moveHTMLElement(element, 100, 0);
    </script>
</body>