LibWeb: Add select element size property

Author: https://github.com/bplaat
Commit: 4e5ce7b63e
Pull-request: https://github.com/SerenityOS/serenity/pull/23895
Reviewed-by: https://github.com/shannonbooth

Userland/Libraries/LibWeb/HTML/HTMLSelectElement.h

@@ -13,6 +13,7 @@
 #include <LibWeb/HTML/HTMLElement.h>
 #include <LibWeb/HTML/HTMLOptionsCollection.h>
 #include <LibWeb/HTML/SelectItem.h>
+#include <LibWeb/WebIDL/Types.h>
 
 namespace Web::HTML {
 
@@ -28,6 +29,9 @@ public:
 
     virtual void adjust_computed_style(CSS::StyleProperties&) override;
 
+    WebIDL::UnsignedLong size() const;
+    WebIDL::ExceptionOr<void> set_size(WebIDL::UnsignedLong);
+
     JS::GCPtr<HTMLOptionsCollection> const& options();
 
     size_t length();