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diff --git a/Userland/Libraries/LibJS/Runtime/ProxyObject.h b/Userland/Libraries/LibJS/Runtime/ProxyObject.h
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+++ b/Userland/Libraries/LibJS/Runtime/ProxyObject.h
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+/*
+ * Copyright (c) 2020, Matthew Olsson <matthewcolsson@gmail.com>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. 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.
+ *
+ * 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 HOLDER 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 <LibJS/Runtime/Function.h>
+
+namespace JS {
+
+class ProxyObject final : public Function {
+    JS_OBJECT(ProxyObject, Function);
+
+public:
+    static ProxyObject* create(GlobalObject&, Object& target, Object& handler);
+
+    ProxyObject(Object& target, Object& handler, Object& prototype);
+    virtual ~ProxyObject() override;
+
+    virtual Value call() override;
+    virtual Value construct(Function& new_target) override;
+    virtual const FlyString& name() const override;
+    virtual LexicalEnvironment* create_environment() override;
+
+    const Object& target() const { return m_target; }
+    const Object& handler() const { return m_handler; }
+
+    virtual Object* prototype() override;
+    virtual const Object* prototype() const override;
+    virtual bool set_prototype(Object* object) override;
+    virtual bool is_extensible() const override;
+    virtual bool prevent_extensions() override;
+    virtual Optional<PropertyDescriptor> get_own_property_descriptor(const PropertyName&) const override;
+    virtual bool define_property(const StringOrSymbol& property_name, const Object& descriptor, bool throw_exceptions = true) override;
+    virtual bool has_property(const PropertyName& name) const override;
+    virtual Value get(const PropertyName& name, Value receiver) const override;
+    virtual bool put(const PropertyName& name, Value value, Value receiver) override;
+    virtual Value delete_property(const PropertyName& name) override;
+
+    void revoke() { m_is_revoked = true; }
+
+private:
+    virtual void visit_edges(Visitor&) override;
+
+    virtual bool is_function() const override { return m_target.is_function(); }
+    virtual bool is_array() const override { return m_target.is_array(); };
+
+    Object& m_target;
+    Object& m_handler;
+    bool m_is_revoked { false };
+};
+
+}