LibWeb: Implement the MediaError IDL interface

Userland/Libraries/LibWeb/HTML/MediaError.h

@@ -0,0 +1,41 @@
+/*
+ * Copyright (c) 2023, Tim Flynn <trflynn89@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <AK/String.h>
+#include <LibJS/Forward.h>
+#include <LibWeb/Bindings/PlatformObject.h>
+
+namespace Web::HTML {
+
+class MediaError final : public Bindings::PlatformObject {
+    WEB_PLATFORM_OBJECT(MediaError, Bindings::PlatformObject);
+
+public:
+    enum class Code : u16 {
+        Aborted = 1,
+        Network = 2,
+        Decode = 3,
+        SrcNotSupported = 4,
+    };
+
+    Code code() const { return m_code; }
+    String const& message() const { return m_message; }
+
+private:
+    MediaError(JS::Realm&, Code code, String message);
+
+    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
+
+    // https://html.spec.whatwg.org/multipage/media.html#dom-mediaerror-code
+    Code m_code;
+
+    // https://html.spec.whatwg.org/multipage/media.html#dom-mediaerror-message
+    String m_message;
+};
+
+}