diff --git a/Userland/Libraries/LibWeb/HTML/CloseEvent.h b/Userland/Libraries/LibWeb/HTML/CloseEvent.h
index 9c0e71064b..3b7c56f2f7 100644
--- a/Userland/Libraries/LibWeb/HTML/CloseEvent.h
+++ b/Userland/Libraries/LibWeb/HTML/CloseEvent.h
@@ -10,27 +10,37 @@
 
 namespace Web::HTML {
 
+struct CloseEventInit : public DOM::EventInit {
+    bool was_clean { false };
+    u16 code { 0 };
+    String reason { "" };
+};
+
 class CloseEvent : public DOM::Event {
 public:
     using WrapperType = Bindings::CloseEventWrapper;
 
-    static NonnullRefPtr<CloseEvent> create(const FlyString& event_name, bool was_clean, u16 code, const String& reason)
+    static NonnullRefPtr<CloseEvent> create(FlyString const& event_name, CloseEventInit const& event_init = {})
     {
-        return adopt_ref(*new CloseEvent(event_name, was_clean, code, reason));
+        return adopt_ref(*new CloseEvent(event_name, event_init));
+    }
+    static NonnullRefPtr<CloseEvent> create_with_global_object(Bindings::WindowObject&, FlyString const& event_name, CloseEventInit const& event_init)
+    {
+        return CloseEvent::create(event_name, event_init);
     }
 
     virtual ~CloseEvent() override = default;
 
-    bool was_clean() { return m_was_clean; }
+    bool was_clean() const { return m_was_clean; }
     u16 code() const { return m_code; }
     String reason() const { return m_reason; }
 
 protected:
-    CloseEvent(const FlyString& event_name, bool was_clean, u16 code, const String& reason)
-        : Event(event_name)
-        , m_was_clean(was_clean)
-        , m_code(code)
-        , m_reason(reason)
+    CloseEvent(FlyString const& event_name, CloseEventInit const& event_init)
+        : Event(event_name, event_init)
+        , m_was_clean(event_init.was_clean)
+        , m_code(event_init.code)
+        , m_reason(event_init.reason)
     {
     }
 
diff --git a/Userland/Libraries/LibWeb/HTML/CloseEvent.idl b/Userland/Libraries/LibWeb/HTML/CloseEvent.idl
index bc2df5c1f8..7abf0cb6a4 100644
--- a/Userland/Libraries/LibWeb/HTML/CloseEvent.idl
+++ b/Userland/Libraries/LibWeb/HTML/CloseEvent.idl
@@ -1,7 +1,15 @@
+#import <DOM/Event.idl>
+
 interface CloseEvent : Event {
+    constructor(DOMString type, optional CloseEventInit eventInitDict = {});
 
     readonly attribute boolean wasClean;
     readonly attribute unsigned short code;
     readonly attribute USVString reason;
-
+};
+
+dictionary CloseEventInit : EventInit {
+    boolean wasClean = false;
+    unsigned short code = 0;
+    USVString reason = "";
 };
diff --git a/Userland/Libraries/LibWeb/HTML/WebSocket.cpp b/Userland/Libraries/LibWeb/HTML/WebSocket.cpp
index bd50c022ef..c5dfca9088 100644
--- a/Userland/Libraries/LibWeb/HTML/WebSocket.cpp
+++ b/Userland/Libraries/LibWeb/HTML/WebSocket.cpp
@@ -189,7 +189,11 @@ void WebSocket::on_close(u16 code, String reason, bool was_clean)
 {
     // 1. Change the readyState attribute's value to CLOSED. This is handled by the Protocol's WebSocket
     // 2. If [needed], fire an event named error at the WebSocket object. This is handled by the Protocol's WebSocket
-    dispatch_event(CloseEvent::create(EventNames::close, was_clean, code, reason));
+    CloseEventInit event_init {};
+    event_init.was_clean = was_clean;
+    event_init.code = code;
+    event_init.reason = move(reason);
+    dispatch_event(CloseEvent::create(EventNames::close, event_init));
 }
 
 // https://html.spec.whatwg.org/multipage/web-sockets.html#feedback-from-the-protocol