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LibWeb: Implement document.scrollingElement
This returns a reference to the element that scrolls the document. In standards mode it is equivalent to `document.documentElement`.
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@ -3857,4 +3857,26 @@ Vector<JS::NonnullGCPtr<Element>> Document::elements_from_point(double x, double
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return sequence;
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}
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// https://drafts.csswg.org/cssom-view/#dom-document-scrollingelement
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JS::GCPtr<Element const> Document::scrolling_element() const
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{
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// 1. If the Document is in quirks mode, follow these substeps:
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if (in_quirks_mode()) {
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// 1. If the body element exists, and it is not potentially scrollable, return the body element and abort these steps.
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// For this purpose, a value of overflow:clip on the the body element’s parent element must be treated as overflow:hidden.
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if (auto const* body_element = body(); body_element && !body_element->is_potentially_scrollable())
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return body_element;
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// 2. Return null and abort these steps.
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return nullptr;
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}
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// 2. If there is a root element, return the root element and abort these steps.
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if (auto const* root_element = document_element(); root_element)
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return root_element;
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// 3. Return null.
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return nullptr;
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}
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}
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