34 lines
1 KiB
HTML
34 lines
1 KiB
HTML
<!DOCTYPE html>
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<html class=reftest-wait>
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<title>View transitions: ensure :only-child is supported on view-transition</title>
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<link rel="help" href="https://drafts.csswg.org/css-view-transitions-1/">
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<link rel="author" href="mailto:khushalsagar@chromium.org">
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<style>
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::view-transition {
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background-color: red;
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}
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::view-transition:only-child {
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background-color: blue;
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}
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</style>
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<script>
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promise_test(() => {
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assert_implements(document.startViewTransition, "Missing document.startViewTransition");
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return new Promise(async (resolve, reject) => {
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let transition = document.startViewTransition();
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transition.ready.then(() => {
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let style = getComputedStyle(
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document.documentElement, "::view-transition");
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if (style.backgroundColor == "rgb(255, 0, 0)")
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resolve();
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else
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reject(style.backgroundColor);
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});
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});
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}, ":only-child is not supported on view-transition");
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</script>
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