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902edb925e
Calling scroll() on an element which is not rendered (by a parent with display: none) would previously cause a crash. In fact, we should terminate the algorithm [https://drafts.csswg.org/cssom-view/#dom-element-scroll] at step 10 in this situation. The fix hinges on implementing Element::has_css_layout_box() correctly, rather than just returning true in all cases as we did previously. Fixes #19430.
21 lines
742 B
HTML
21 lines
742 B
HTML
<!DOCTYPE html>
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<meta charset=utf-8>
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<title>cssom-view - Scrolling element with no layout box</title>
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<link rel="help" href="https://drafts.csswg.org/cssom-view/#dom-element-scroll">
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<link rel="help" href="https://drafts.csswg.org/cssom-view/#css-layout-box">
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<div style="display: none">
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<div id="elem"></div>
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</div>
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<script>
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test(() => {
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const elem = document.getElementById('elem');
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elem.scroll(1, 2);
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assert_equals(elem.scrollTop, 0, "scrollTop should be unchanged");
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assert_equals(elem.scrollLeft, 0, "scrollLeft should be unchanged");
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}, "scrolling an element with no CSS layout box should have no effect");
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</script>
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