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<!DOCTYPE html>
<script src = "/resources/testharness.js"></script>
<script src = "/resources/testharnessreport.js"></script>
<link id="light-link" rel="stylesheet" href="resources/link-rel-attribute.css">
<div id="light-div" class="green">I"m green when light DOM link is on</div>
<div id="host">
I"m green when Shadow DOM link is on
<template id="shadow-dom">
<link id="shadow-link" rel="stylesheet" href="resources/link-rel-attribute.css">
<div id="shadow-div" class="green">
<slot></slot>
</div>
</template>
</div>
<script>
function testLinkRelModification(testDiv, testLink) {
assert_equals(getComputedStyle(testDiv).color, "rgb(0, 128, 0)");
testLink.setAttribute("rel", "no-stylesheet");
assert_equals(getComputedStyle(testDiv).color, "rgb(0, 0, 0)");
testLink.setAttribute("rel", "stylesheet");
assert_equals(getComputedStyle(testDiv).color, "rgb(0, 128, 0)");
testLink.removeAttribute("rel");
assert_equals(getComputedStyle(testDiv).color, "rgb(0, 0, 0)");
}
test (() => {
testLinkRelModification(document.querySelector("#light-div"),
document.querySelector("#light-link"));
}, "Removing stylesheet from link rel attribute should remove the stylesheet for light DOM");
test (() => {
var host = document.querySelector("#host");
var shadow = host.attachShadow({ mode: "open" });
var tmpl = document.querySelector("template#shadow-dom");
var clone = document.importNode(tmpl.content, true);
shadow.appendChild(clone);
testLinkRelModification(shadow.querySelector("#shadow-div"),
shadow.querySelector("#shadow-link"));
}, "Removing stylesheet from link rel attribute should remove the stylesheet for shadow DOM");
</script>
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