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<!DOCTYPE html>
<html class="reftest-wait">
<meta charset="utf-8">
<title>Content Visibility: shadow dom</title>
<link rel="author" title="Rakina Zata Amni" href="mailto:rakina@chromium.org">
<link rel="help" href="https://drafts.csswg.org/css-contain/#content-visibility">
<link rel="match" href="container-with-child-ref.html">
<meta name="assert" content="content-visibility hidden can be used in a shadow DOM">
<script src="/common/reftest-wait.js"></script>
<style>
.hidden {
content-visibility: hidden;
}
.child {
width: 50px;
height: 50px;
background: green;
}
</style>
<div id="host">
<div id="slotted">
Test passes if you can see this text and a green box.
<div class=child></div>
</div>
</div>
<script>
async function runTest() {
// Set up hidden element within shadow root.
let shadowRoot = host.attachShadow({ mode: "open" });
let hidden = document.createElement("div");
shadowRoot.innerHTML = `
<style>
.container {
width: 150px;
height: 150px;
background: lightblue;
}
</style>`;
shadowRoot.appendChild(hidden);
hidden.innerHTML = "<slot></slot>";
hidden.getBoundingClientRect();
hidden.classList.add("container");
hidden.classList.add("hidden");
requestAnimationFrame(() => {
slotted.style = "display: none";
// Do a forced layout outside the hidden subtree.
host.getBoundingClientRect();
hidden.classList.remove("hidden");
slotted.style = "";
requestAnimationFrame(() => {
// Check that everything is painted as we expect.
takeScreenshot();
});
});
}
window.onload = runTest;
</script>
</html>
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