61 lines
2.4 KiB
HTML
61 lines
2.4 KiB
HTML
<!doctype HTML>
|
|
<html>
|
|
<meta charset="utf8">
|
|
<title>Display Locking: style on hidden element & child</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">
|
|
<meta name="assert" content="style is available for content-visibility hidden elements">
|
|
|
|
<style>
|
|
.hidden {
|
|
content-visibility: hidden;
|
|
}
|
|
</style>
|
|
<div id="container" class=hidden>
|
|
<div id="child">
|
|
<div id="grandchild"></div>
|
|
</div>
|
|
</div>
|
|
|
|
<script src="/resources/testharness.js"></script>
|
|
<script src="/resources/testharnessreport.js"></script>
|
|
|
|
<script>
|
|
async_test((t) => {
|
|
async function runTest() {
|
|
let container = document.getElementById("container");
|
|
container.style = "color: blue;";
|
|
t.step(() => assert_equals(getComputedStyle(container).color, "rgb(0, 0, 255)", "container color changed to blue"));
|
|
t.step(() => assert_equals(getComputedStyle(child).color, "rgb(0, 0, 255)", "child inherits blue color"));
|
|
t.step(() => assert_equals(getComputedStyle(grandchild).color, "rgb(0, 0, 255)", "grandchild inherits blue color"));
|
|
|
|
child.style = "color: green;";
|
|
t.step(() => assert_equals(getComputedStyle(container).color, "rgb(0, 0, 255)", "container color is still blue"));
|
|
t.step(() => assert_equals(getComputedStyle(child).color, "rgb(0, 128, 0)", "child color changed to green"));
|
|
t.step(() => assert_equals(getComputedStyle(grandchild).color, "rgb(0, 128, 0)", "grandchild inherits green color"));
|
|
|
|
child.style = "";
|
|
|
|
// Commit container, lock child.
|
|
container.classList.remove("hidden");
|
|
child.classList.add("hidden");
|
|
requestAnimationFrame(() => {
|
|
// Update style outside of the hidden subtree.
|
|
container.style = "color: red;";
|
|
container.offsetTop;
|
|
|
|
// Inheritance works as usual through hidden boundaries.
|
|
t.step(() => assert_equals(getComputedStyle(grandchild).color, "rgb(255, 0, 0)", "grandchild inherits red color"));
|
|
t.step(() => assert_equals(getComputedStyle(child).color, "rgb(255, 0, 0)", "child inherits red color"));
|
|
t.step(() => assert_equals(getComputedStyle(container).color, "rgb(255, 0, 0)", "container color changed to red"));
|
|
|
|
t.done();
|
|
});
|
|
}
|
|
|
|
window.onload = function() {
|
|
requestAnimationFrame(() => requestAnimationFrame(runTest));
|
|
};
|
|
}, "getComputedStyle gets up-to-date style");
|
|
</script>
|
|
|