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diff --git a/src/bun.js/bindings/webcore/CloseEvent.h b/src/bun.js/bindings/webcore/CloseEvent.h
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+++ b/src/bun.js/bindings/webcore/CloseEvent.h
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+/*
+ * Copyright (C) 2011 Google Inc.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * 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.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * 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
+ * OWNER 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 "root.h"
+#include "Event.h"
+#include "EventNames.h"
+
+namespace WebCore {
+
+class CloseEvent final : public Event {
+    WTF_MAKE_ISO_ALLOCATED(CloseEvent);
+
+public:
+    static Ref<CloseEvent> create(bool wasClean, unsigned short code, const String& reason)
+    {
+        return adoptRef(*new CloseEvent(wasClean, code, reason));
+    }
+
+    struct Init : EventInit {
+        bool wasClean { false };
+        unsigned short code { 0 };
+        String reason;
+    };
+
+    static Ref<CloseEvent> create(const AtomString& type, const Init& initializer, IsTrusted isTrusted = IsTrusted::No)
+    {
+        return adoptRef(*new CloseEvent(type, initializer, isTrusted));
+    }
+
+    bool wasClean() const { return m_wasClean; }
+    unsigned short code() const { return m_code; }
+    String reason() const { return m_reason; }
+
+    // Event function.
+    EventInterface eventInterface() const override { return CloseEventInterfaceType; }
+
+private:
+    CloseEvent(bool wasClean, int code, const String& reason)
+        : Event(eventNames().closeEvent, CanBubble::No, IsCancelable::No)
+        , m_wasClean(wasClean)
+        , m_code(code)
+        , m_reason(reason)
+    {
+    }
+
+    CloseEvent(const AtomString& type, const Init& initializer, IsTrusted isTrusted)
+        : Event(type, initializer, isTrusted)
+        , m_wasClean(initializer.wasClean)
+        , m_code(initializer.code)
+        , m_reason(initializer.reason)
+    {
+    }
+
+    bool m_wasClean;
+    unsigned short m_code;
+    String m_reason;
+};
+
+} // namespace WebCore