<svg width="500" height="150" viewBox="0 0 1000 300" xmlns="http://www.w3.org/2000/svg">
    <rect id="background" width="100%" height="100%" fill="red" />
    <text id="text" x="10" y="1em" dx="0 50 100">Foo</text>
    <defs>
        <style type="text/css">
        <![CDATA[
            @font-face {
                font-family: Ahem;
                src: url(../../resources/Ahem.ttf);
            }
            text {
                font-family: Ahem;
                font-size: 40px;
            }
            ]]>
        </style>
        <script type="text/javascript">
        <![CDATA[
            // The point at 15,15 is contained within the text's bounding box.
            // The point at 30,15 is contained in between the text's character cells
            // and thus should return the background.
            var text = document.getElementById("text");
            var background = document.getElementById("background");
            if (document.elementFromPoint(15, 15) === text && document.elementFromPoint(35, 15) === background) {
                background.setAttribute("fill", "green");
                text.remove();
            }
        ]]>
        </script>
    </defs>
</svg>