LibWeb/CSS: Implement CSSNumericArray

Author: https://github.com/AtkinsSJ
Commit: a46c980629
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/5955
Reviewed-by: https://github.com/trflynn89

Libraries/LibWeb/CSS/CSSNumericArray.h

@@ -0,0 +1,37 @@
+/*
+ * Copyright (c) 2025, Sam Atkins <sam@ladybird.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <LibWeb/Bindings/PlatformObject.h>
+#include <LibWeb/WebIDL/Types.h>
+
+namespace Web::CSS {
+
+// https://drafts.css-houdini.org/css-typed-om-1/#cssnumericarray
+class CSSNumericArray : public Bindings::PlatformObject {
+    WEB_PLATFORM_OBJECT(CSSNumericArray, Bindings::PlatformObject);
+    GC_DECLARE_ALLOCATOR(CSSNumericArray);
+
+public:
+    [[nodiscard]] static GC::Ref<CSSNumericArray> create(JS::Realm&, Vector<GC::Ref<CSSNumericValue>>);
+
+    virtual ~CSSNumericArray() override;
+
+    WebIDL::UnsignedLong length() const;
+    virtual Optional<JS::Value> item_value(size_t index) const override;
+    Vector<GC::Ref<CSSNumericValue>> values() { return m_values; }
+
+    virtual void initialize(JS::Realm&) override;
+    virtual void visit_edges(Visitor&) override;
+
+private:
+    CSSNumericArray(JS::Realm&, Vector<GC::Ref<CSSNumericValue>>);
+
+    Vector<GC::Ref<CSSNumericValue>> m_values;
+};
+
+}