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Test Info:
- This WPT test may be referenced by the following Test IDs:
- /css/css-view-transitions/only-child-on-root-element-with-view-transition.html - WPT Dashboard Interop Dashboard
<!DOCTYPE html>
<html class="reftest-wait foo">
<title>View transitions: ensure :only-child is supported on view-transition</title>
<link rel="author" href="mailto:khushalsagar@chromium.org">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
::view-transition {
background-color: red;
}
html:only-child {
background-color: blue;
}
:root:only-child {
background-color: blue;
}
:only-child {
background-color: blue;
}
.foo:only-child {
background-color: blue;
}
</style>
<script>
promise_test(() => {
assert_implements(document.startViewTransition, "Missing document.startViewTransition");
return new Promise(async (resolve, reject) => {
let transition = document.startViewTransition();
transition.ready.then(() => {
let style = getComputedStyle(
document.documentElement, "::view-transition");
if (style.backgroundColor == "rgb(255, 0, 0)")
resolve();
else
reject(style.backgroundColor);
});
});
}, ":only-child is not supported on view-transition");
</script>