LayoutTests/svg/custom/js-update-gradient.svg

<?xml version="1.0" encoding="ISO-8859-1" standalone="no"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 20010904//EN" "http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd">
<svg width="450" height="450" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" onload="runRepaintTest()">
<script xlink:href="../../fast/repaint/resources/repaint.js"/>
<defs>
    <linearGradient id="Gradient" gradientUnits="userSpaceOnUse" x1="10" y1="10" x2="440" y2="10">
        <stop id="stop1" stop-color="blue" offset="0"/>
        <stop stop-color="red" offset="1"/>
    </linearGradient>
</defs>

<script>
function repaintTest() {
    var gradient = document.getElementById("Gradient");
    var stop = document.getElementById("stop1");
    gradient.x1.baseVal.value = 150;
    stop.setAttribute("stop-color", "green");
    stop.setAttribute("stop-opacity", "0.5");
    stop.setAttribute("offset", "0.3");
}
</script>

<rect x="10" y="10" width="430" height="80" fill="url(#Gradient)" />
<rect x="10" y="100" width="430" height="80" fill="url(#Gradient)" />

</svg>