45 lines
1.8 KiB
HTML
45 lines
1.8 KiB
HTML
<!DOCTYPE html>
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<title>CSS Positioned Layout Module Test: 'overlay' is transitioned in and out of 'auto'</title>
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<link rel="help" href="https://drafts.csswg.org/css-position-4/#overlay">
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<link rel="help" href="https://html.spec.whatwg.org/multipage/popover.html">
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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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#transition-in, #transition-out {
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/* Force display:block both popover open or closed to not rely on
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@starting-style or display transitions. */
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display: block;
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}
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.enable-transitions :is(#transition-in, #transition-out) {
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transition: overlay 60s step-end;
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transition-behavior: allow-discrete;
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}
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</style>
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<div id="container">
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<div id="transition-in" popover></div>
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<div id="transition-out" popover></div>
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</div>
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<script>
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let transition_in = document.querySelector("#transition-in");
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let transition_out = document.querySelector("#transition-out");
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test(() => {
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transition_out.showPopover();
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assert_equals(getComputedStyle(transition_in).overlay, "none");
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assert_equals(getComputedStyle(transition_out).overlay, "auto");
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}, "Open the popover to be closed and verify computed overlay for both popovers");
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container.className = "enable-transitions";
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test(() => {
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assert_true(transition_out.matches(':popover-open'));
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assert_false(transition_in.matches(':popover-open'));
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transition_in.showPopover();
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assert_true(transition_in.matches(':popover-open'));
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assert_false(transition_out.matches(':popover-open'));
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assert_equals(getComputedStyle(transition_in).overlay, "none",
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'Transition in should be delayed');
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assert_equals(getComputedStyle(transition_out).overlay, "auto",
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'Transition out should be delayed');
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}, "Transition overlays");
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</script>
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