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diff --git a/src/bun.js/bindings/DOMFormData.h b/src/bun.js/bindings/DOMFormData.h
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+++ b/src/bun.js/bindings/DOMFormData.h
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+/*
+ * Copyright (C) 2010 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 "ContextDestructionObserver.h"
+#include <variant>
+#include <wtf/RefCounted.h>
+#include <wtf/text/WTFString.h>
+#include "blob.h"
+namespace WebCore {
+
+template<typename> class ExceptionOr;
+class HTMLElement;
+class HTMLFormElement;
+
+class DOMFormData : public RefCounted<DOMFormData>, public ContextDestructionObserver {
+public:
+    using FormDataEntryValue = std::variant<String, RefPtr<Blob>>;
+
+    struct Item {
+        String name;
+        FormDataEntryValue data;
+    };
+
+    // static Ref<DOMFormData> create(ScriptExecutionContext*, const PAL::TextEncoding&);
+    static Ref<DOMFormData> create(ScriptExecutionContext*);
+    static Ref<DOMFormData> create(ScriptExecutionContext*, StringView urlEncodedString);
+
+    const Vector<Item>& items() const { return m_items; }
+    // const PAL::TextEncoding& encoding() const { return m_encoding; }
+
+    void append(const String& name, const String& value);
+    void append(const String& name, RefPtr<Blob>, const String& filename = {});
+    void remove(const String& name);
+    std::optional<FormDataEntryValue> get(const String& name);
+    Vector<FormDataEntryValue> getAll(const String& name);
+    bool has(const String& name);
+    void set(const String& name, const String& value);
+    void set(const String& name, RefPtr<Blob>, const String& filename = {});
+    Ref<DOMFormData> clone() const;
+
+    size_t count() const { return m_items.size(); }
+
+    String toURLEncodedString();
+
+    class Iterator {
+    public:
+        explicit Iterator(DOMFormData&);
+        std::optional<KeyValuePair<String, FormDataEntryValue>> next();
+
+    private:
+        Ref<DOMFormData> m_target;
+        size_t m_index { 0 };
+    };
+    Iterator createIterator() { return Iterator { *this }; }
+
+private:
+    // explicit DOMFormData(ScriptExecutionContext*, const PAL::TextEncoding& = PAL::UTF8Encoding());
+    explicit DOMFormData(ScriptExecutionContext*);
+
+    void set(const String& name, Item&&);
+
+    // PAL::TextEncoding m_encoding;
+    Vector<Item> m_items;
+};
+
+} // namespace WebCore