<!DOCTYPE html>
<html>
<body>
<p>Test passes if you see a single 100px by 100px green box below.</p>
<div id="host" style="width: 100px; height: 100px;"></div>
<svg>
    <defs>
        <path id="path" fill="red" stroke="red" d="M0,50 L100,50 Z">
    </defs>
</svg>
<template>
    <svg viewbox="0 0 100 100" xmlns:xlink="http://www.w3.org/1999/xlink">
        <defs>
            <path id="path" fill="green" d="M0,-5 L100,-5 Z">
        </defs>
        <rect x="0" y="0" width="100" height="100" fill="green"></rect>
        <text>
            <textPath xlink:href="#path">FAIL</textPath>
        </text>
    </svg>
</template>
<script>

const shadowRoot = host.attachShadow({mode: 'closed'});
shadowRoot.appendChild(document.querySelector('template').content.cloneNode(true));

</script>
</body>
</html>