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@@ -91,6 +91,26 @@ void PaintableBox::set_scroll_offset(CSSPixelPoint offset)
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return;
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}
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+ // https://drafts.csswg.org/cssom-view-1/#scrolling-events
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+ // Whenever an element gets scrolled (whether in response to user interaction or by an API),
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+ // the user agent must run these steps:
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+
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+ // 1. Let doc be the element’s node document.
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+ auto& document = layout_box().document();
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+
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+ // FIXME: 2. If the element is a snap container, run the steps to update snapchanging targets for the element with
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+ // the element’s eventual snap target in the block axis as newBlockTarget and the element’s eventual snap
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+ // target in the inline axis as newInlineTarget.
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+
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+ JS::NonnullGCPtr<DOM::EventTarget> const event_target = *dom_node();
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+
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+ // 3. If the element is already in doc’s pending scroll event targets, abort these steps.
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+ if (document.pending_scroll_event_targets().contains_slow(event_target))
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+ return;
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+
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+ // 4. Append the element to doc’s pending scroll event targets.
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+ document.pending_scroll_event_targets().append(*layout_box().dom_node());
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+
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set_needs_display();
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}
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Aliaksandr Kalenik