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<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
<title><!-- Shadow Parts issue with xul/xbl domparser --></title>
<script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
<link rel="stylesheet" href="chrome://mochikit/content/tests/SimpleTest/test.css"/>
<style>custom-button::part(foo) { background: red; }</style>
<script>
add_task(async function test() {
// A simplified version of what MozXULElement.parseXULToFragment does
let parser = new DOMParser();
parser.forceEnableXULXBL();
let doc = parser.parseFromString(`<box xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"><box part="foo">there</box></box>`, `application/xml`);
let range = doc.createRange();
range.selectNodeContents(doc.querySelector("box"));
let frag = range.extractContents();
customElements.define("custom-button", class extends HTMLElement {
constructor() {
super();
this.attachShadow({mode: "open"});
this.shadowRoot.appendChild(document.importNode(frag, true));
}
});
let button = document.createElement("custom-button");
document.body.appendChild(button);
let box = button.shadowRoot.querySelector("box");
// XXX: this fixes it
// box.removeAttribute("part");
// box.setAttribute("part", "foo");
is(window.getComputedStyle(box).getPropertyValue("background-color"), "rgb(255, 0, 0)", "part applied");
});
</script>
</head>
<body>
<p id="display"></p>
<div id="content" style="display: none"></div>
<pre id="test"></pre>
</body>
</html>
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