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<!DOCTYPE HTML>
<title>Test for bug 1576229 - Nodes in Shadow DOM react properly to dynamic changes in user sheets</title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<link rel="stylesheet" href="/tests/SimpleTest/test.css">
<div></div>
<span id="host" style="display: block"></span>
<script>
const gIOService = SpecialPowers.Cc["@mozilla.org/network/io-service;1"]
.getService(SpecialPowers.Ci.nsIIOService)
const gSSService = SpecialPowers.Cc["@mozilla.org/content/style-sheet-service;1"]
.getService(SpecialPowers.Ci.nsIStyleSheetService);
const windowUtils = SpecialPowers.getDOMWindowUtils(window);
function loadUserSheet(style) {
const uri = gIOService.newURI("data:text/css," + style);
windowUtils.loadSheet(uri, windowUtils.USER_SHEET);
}
SimpleTest.waitForExplicitFinish();
onload = function() {
loadUserSheet(`
div {
width: 100px;
height: 100px;
background-color: red;
}
.foo {
background-color: green;
}
`);
let host = document.querySelector("#host");
host.attachShadow({ mode: "open" }).innerHTML = `
<div></div>
`;
let light = document.querySelector('div');
let shadow = host.shadowRoot.querySelector('div');
is(getComputedStyle(light).backgroundColor, "rgb(255, 0, 0)", "User sheet works in light DOM");
is(getComputedStyle(shadow).backgroundColor, "rgb(255, 0, 0)", "User sheet works in shadow DOM");
light.classList.add("foo");
shadow.classList.add("foo");
is(getComputedStyle(light).backgroundColor, "rgb(0, 128, 0)", "Dynamic change for user sheet works in light DOM");
is(getComputedStyle(shadow).backgroundColor, "rgb(0, 128, 0)", "Dynamic change for user sheet works in shadow DOM");
SimpleTest.finish();
}
</script>