58 lines
1.3 KiB
HTML
58 lines
1.3 KiB
HTML
<!DOCTYPE html>
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<title>position:sticky elements should not affect the flow position of other elements</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 do not affect the flow position of other elements" />
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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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.scroller {
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position: relative;
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height: 200px;
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width: 100px;
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overflow: scroll;
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}
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#sticky {
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background-color: green;
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position: sticky;
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top: 150px;
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}
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#before {
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background-color: fuchsia;
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}
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#after {
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background-color: orange;
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}
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.box {
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height: 50px;
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width: 50px;
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}
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.padding {
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height: 500px;
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}
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</style>
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<div class="scroller">
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<div id="before" class="box"></div>
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<div id="sticky" class="box"></div>
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<div id="after" class="box"></div>
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<div class="padding"></div>
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</div>
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<script>
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test(() => {
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// The sticky element is pushed to be stuck 150 pixels from the top.
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assert_equals(sticky.offsetTop, 150);
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// Neither 'before' or 'after' should be affected by the change in the sticky
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// element's location.
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assert_equals(before.offsetTop, 0);
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assert_equals(after.offsetTop, before.clientHeight + sticky.clientHeight);
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}, 'sticky offset should not affect the position of other elements.');
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</script>
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