58 lines
1.5 KiB
HTML
58 lines
1.5 KiB
HTML
<!doctype html>
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<html>
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<head>
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<meta charset=utf-8>
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<title>CSS Transitions Test: 0-duration transition with delay applies after delay</title>
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<meta name="assert" content="Transition with 0s duration and 0.3s delay applies property change after delay period">
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<link rel="help" href="https://drafts.csswg.org/css-transitions/#starting">
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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/helper.js"></script>
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</head>
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<body>
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<div id="log"></div>
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<script>
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promise_test(async t => {
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const div = addDiv(t, {
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style: 'transition: width 0.1s; width: 0px;'
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});
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// Flush initial state
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getComputedStyle(div).width;
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// First transition to 100px
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div.style.width = '100px';
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await waitForTransitionEnd(div);
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// Change transition to 0s duration with 300ms delay
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div.style.transition = 'width 0s linear 0.3s';
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// Set width back to 0
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const startTime = performance.now();
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div.style.width = '0px';
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// Immediate check - should NOT have changed yet
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const computedStart = getComputedStyle(div).width;
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assert_equals(
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computedStart,
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'100px',
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'Width should remain at 100px initially'
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);
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// Wait for transitionend (should trigger after 300ms delay)
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await waitForTransitionEnd(div);
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// Verify final state
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const finalWidth = getComputedStyle(div).width;
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assert_equals(
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finalWidth,
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'0px',
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'Width should reset to 0 after delay'
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);
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}, '0-duration transition with delay applies change after delay period');
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</script>
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</body>
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</html>
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