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44 lines
1.4 KiB
HTML
44 lines
1.4 KiB
HTML
<!doctype html>
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<meta charset=utf-8>
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<title>CSS Animations on a <dialog> ::backdrop</title>
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<link rel="help" href="https://drafts.csswg.org/css-animations-1/">
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<script src="support/testcommon.js"></script>
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<style>
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dialog[open]::backdrop {
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animation: dialog-backdrop-animation 1ms;
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}
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@keyframes dialog-backdrop-animation {
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from { opacity: 0 }
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}
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</style>
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<div id="log"></div>
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<script>
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"use strict";
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promise_test(async t => {
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const dialog = addElement(t, "dialog");
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// Open the dialog a first time, this should trigger a CSS Animation.
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dialog.showModal();
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const animations = dialog.getAnimations({ subtree: true });
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assert_equals(animations.length, 1, "As the <dialog> is shown intially an animation is started on its ::backdrop");
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await animations[0].finished;
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await waitForNextFrame();
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dialog.close();
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assert_equals(dialog.getAnimations({ subtree: true }).length, 0, "As the <dialog> is closed the animation is removed from its ::backdrop");
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await waitForNextFrame();
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dialog.showModal();
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assert_equals(dialog.getAnimations({ subtree: true }).length, 1, "As the <dialog> is shown again an animation is started again on its ::backdrop");
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}, "CSS Animations on a <dialog> ::backdrop are canceled and restarted as the dialog is hidden and shown");
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</script>
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