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41 lines
1.6 KiB
HTML
41 lines
1.6 KiB
HTML
<!DOCTYPE html>
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<title>position:sticky elements should respect the right constraint</title>
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<link rel="help" href="https://www.w3.org/TR/css-position-3/#sticky-pos" />
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<meta name="assert" content="This test checks that position:sticky elements obey their right anchor after scrolling" />
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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="resources/sticky-util.js"></script>
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<body></body>
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<script>
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test(() => {
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const elements = setupStickyTest('right', 25, true);
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elements.scroller.scrollLeft = 200;
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const nonStickyLeftY = elements.container.offsetLeft +
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elements.filler.clientWidth;
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assert_equals(elements.sticky.offsetLeft, nonStickyLeftY);
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}, 'before reaching the sticking point the sticky box should not be offset');
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test(() => {
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const elements = setupStickyTest('right', 25, true);
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elements.scroller.scrollLeft = 75;
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const nonStickyLeftY = elements.container.offsetLeft +
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elements.filler.clientWidth;
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const nonStickyBottomY = nonStickyLeftY + elements.sticky.clientWidth;
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const targetBottomY = elements.scroller.clientWidth +
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elements.scroller.scrollLeft - 25;
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const stickyOffset = nonStickyBottomY - targetBottomY;
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assert_equals(elements.sticky.offsetLeft, nonStickyLeftY - stickyOffset);
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}, 'after reaching the sticking point the sticky box should be offset');
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test(() => {
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const elements = setupStickyTest('right', 25, true);
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elements.scroller.scrollLeft = 15;
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assert_equals(elements.sticky.offsetLeft, elements.container.offsetLeft);
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}, 'the sticky box should not be pushed outside its containing block');
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</script>
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