32 lines
1.1 KiB
HTML
32 lines
1.1 KiB
HTML
<!DOCTYPE html>
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<title>CSS Transitions Test: No transition if @starting-style display value is none</title>
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<link rel="help" href="https://drafts.csswg.org/css-transitions-2/#defining-before-change-style-the-starting-style-rule">
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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="/css/css-transitions/support/helper.js"></script>
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<div id="target"></div>
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<style>
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#target {
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transition-property: background-color;
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transition-duration: 100s;
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transition-timing-function: steps(2, start);
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background-color: green;
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}
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@starting-style {
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#target {
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display: none;
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background-color: red;
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}
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}
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</style>
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<script>
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setup(() => {
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assert_true(supportsStartingStyle(), "Prerequisite: @starting-style parses");
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});
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promise_test(async t => {
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await waitForAnimationFrames(2);
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assert_equals(getComputedStyle(target).backgroundColor, "rgb(0, 128, 0)",
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"No transition of background-color when @starting-style display is 'none'");
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}, "@starting-style with display:none");
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</script>
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