LayoutTests/svg/custom/href-xlink-href-gradient-element.svg

<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
    <defs>
        <linearGradient id="red-gradient">
            <stop offset="0%"  stop-color="red" />
        </linearGradient>
        <linearGradient id="green-gradient">
            <stop offset="0%"  stop-color="green" />
        </linearGradient>
        <linearGradient id="gradient1" href="#green-gradient"/>
        <linearGradient id="gradient2" xlink:href="#green-gradient"/>
        <linearGradient id="gradient3" href="#green-gradient" xlink:href="#red-gradient"/>
        <linearGradient id="gradient4" xlink:href="#red-gradient" href="#green-gradient"/>

        <linearGradient id="gradient5" href="#green-gradient"/>
        <linearGradient id="gradient6" xlink:href="#red-gradient"/>
        <linearGradient id="gradient7" href="#green-gradient" xlink:href="#red-gradient"/>
        <linearGradient id="gradient8" xlink:href="#green-gradient" href="#red-gradient"/>

        <linearGradient id="gradient9" href=""/>
        <linearGradient id="gradient10" xlink:href="#red-gradient"/>
        <linearGradient id="gradient11" href="" xlink:href="#red-gradient"/>
        <linearGradient id="gradient12" xlink:href="#red-gradient" href=""/>
    </defs>
    <rect width="100" height="100" transform="translate(10, 10)" fill="url(#gradient1)"/>
    <rect width="100" height="100" transform="translate(120, 10)" fill="url(#gradient2)"/>
    <rect width="100" height="100" transform="translate(230, 10)" fill="url(#gradient3)"/>
    <rect width="100" height="100" transform="translate(340, 10)" fill="url(#gradient4)"/>

    <rect width="100" height="100" transform="translate(10, 120)" fill="url(#gradient5)"/>
    <rect width="100" height="100" transform="translate(120, 120)" fill="url(#gradient6)"/>
    <rect width="100" height="100" transform="translate(230, 120)" fill="url(#gradient7)"/>
    <rect width="100" height="100" transform="translate(340, 120)" fill="url(#gradient8)"/>

    <rect width="100" height="100" transform="translate(10, 230)" fill="green"/>
    <rect width="100" height="100" transform="translate(120, 230)" fill="green"/>
    <rect width="100" height="100" transform="translate(230, 230)" fill="green"/>
    <rect width="100" height="100" transform="translate(340, 230)" fill="green"/>

    <rect width="100" height="100" transform="translate(10, 230)" fill="url(#gradient9)"/>
    <rect width="100" height="100" transform="translate(120, 230)" fill="url(#gradient10)"/>
    <rect width="100" height="100" transform="translate(230, 230)" fill="url(#gradient11)"/>
    <rect width="100" height="100" transform="translate(340, 230)" fill="url(#gradient12)"/>
    <script>
        window.addEventListener('load', (event) => {
            var gradient5 = document.getElementById("gradient5");
            gradient5.setAttributeNS("http://www.w3.org/1999/xlink", "href", "#red-gradient");

            var gradient6 = document.getElementById("gradient6");
            gradient6.setAttribute("href", "#green-gradient");

            var gradient7 = document.getElementById("gradient7");
            gradient7.removeAttributeNS("http://www.w3.org/1999/xlink", "href");

            var gradient8 = document.getElementById("gradient8");
            gradient8.removeAttribute("href");

            var gradient9 = document.getElementById("gradient9");
            gradient9.setAttributeNS("http://www.w3.org/1999/xlink", "href", "#red-gradient");

            var gradient10 = document.getElementById("gradient10");
            gradient10.setAttribute("href", "");

            var gradient11 = document.getElementById("gradient11");
            gradient11.removeAttributeNS("http://www.w3.org/1999/xlink", "href");

            var gradient12 = document.getElementById("gradient12");
            gradient12.removeAttributeNS("http://www.w3.org/1999/xlink", "href");
        });
    </script>
 </svg>