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diff --git a/Libraries/LibWeb/HTML/HTMLIFrameElement.h b/Libraries/LibWeb/HTML/HTMLIFrameElement.h
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+++ b/Libraries/LibWeb/HTML/HTMLIFrameElement.h
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+/*
+ * Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#pragma once
+
+#include <LibWeb/HTML/HTMLElement.h>
+
+namespace Web {
+
+class HTMLIFrameElement final : public HTMLElement {
+public:
+    HTMLIFrameElement(Document&, const FlyString& local_name);
+    virtual ~HTMLIFrameElement() override;
+
+    virtual RefPtr<LayoutNode> create_layout_node(const StyleProperties* parent_style) override;
+
+    Frame* hosted_frame() { return m_hosted_frame; }
+    const Frame* hosted_frame() const { return m_hosted_frame; }
+
+    const Document* hosted_document() const;
+
+private:
+    virtual void document_did_attach_to_frame(Frame&) override;
+    virtual void document_will_detach_from_frame(Frame&) override;
+
+    void load_src(const String&);
+
+    RefPtr<Frame> m_hosted_frame;
+};
+
+template<>
+inline bool is<HTMLIFrameElement>(const Node& node)
+{
+    return is<Element>(node) && to<Element>(node).local_name() == HTML::TagNames::iframe;
+}
+
+}