LibJS+Everywhere: Allow Cell::initialize overrides to throw OOM errors

Note that as of this commit, there aren't any such throwers, and the
call site in Heap::allocate will drop exceptions on the floor. This
commit only serves to change the declaration of the overrides, make sure
they return an empty value, and to propagate OOM errors frm their base
initialize invocations.

Userland/Libraries/LibWeb/HTML/CanvasGradient.cpp

@@ -47,10 +47,12 @@ CanvasGradient::CanvasGradient(JS::Realm& realm, Gfx::GradientPaintStyle& gradie
 
 CanvasGradient::~CanvasGradient() = default;
 
-void CanvasGradient::initialize(JS::Realm& realm)
+JS::ThrowCompletionOr<void> CanvasGradient::initialize(JS::Realm& realm)
 {
-    Base::initialize(realm);
+    MUST_OR_THROW_OOM(Base::initialize(realm));
     set_prototype(&Bindings::ensure_web_prototype<Bindings::CanvasGradientPrototype>(realm, "CanvasGradient"));
+
+    return {};
 }
 
 // https://html.spec.whatwg.org/multipage/canvas.html#dom-canvasgradient-addcolorstop

Userland/Libraries/LibWeb/HTML/CanvasGradient.h

@@ -29,7 +29,7 @@ public:
 private:
     CanvasGradient(JS::Realm&, Gfx::GradientPaintStyle& gradient);
 
-    virtual void initialize(JS::Realm&) override;
+    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
 
     NonnullRefPtr<Gfx::GradientPaintStyle> m_gradient;
 };

Userland/Libraries/LibWeb/HTML/CanvasRenderingContext2D.cpp

@@ -38,10 +38,12 @@ CanvasRenderingContext2D::CanvasRenderingContext2D(JS::Realm& realm, HTMLCanvasE
 
 CanvasRenderingContext2D::~CanvasRenderingContext2D() = default;
 
-void CanvasRenderingContext2D::initialize(JS::Realm& realm)
+JS::ThrowCompletionOr<void> CanvasRenderingContext2D::initialize(JS::Realm& realm)
 {
-    Base::initialize(realm);
+    MUST_OR_THROW_OOM(Base::initialize(realm));
     set_prototype(&Bindings::ensure_web_prototype<Bindings::CanvasRenderingContext2DPrototype>(realm, "CanvasRenderingContext2D"));
+
+    return {};
 }
 
 void CanvasRenderingContext2D::visit_edges(Cell::Visitor& visitor)

Userland/Libraries/LibWeb/HTML/CanvasRenderingContext2D.h

@@ -86,7 +86,7 @@ public:
 private:
     explicit CanvasRenderingContext2D(JS::Realm&, HTMLCanvasElement&);
 
-    virtual void initialize(JS::Realm&) override;
+    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
     virtual void visit_edges(Cell::Visitor&) override;
 
     struct PreparedTextGlyph {

Userland/Libraries/LibWeb/HTML/CloseEvent.cpp

@@ -29,10 +29,12 @@ CloseEvent::CloseEvent(JS::Realm& realm, DeprecatedFlyString const& event_name,
 
 CloseEvent::~CloseEvent() = default;
 
-void CloseEvent::initialize(JS::Realm& realm)
+JS::ThrowCompletionOr<void> CloseEvent::initialize(JS::Realm& realm)
 {
-    Base::initialize(realm);
+    MUST_OR_THROW_OOM(Base::initialize(realm));
     set_prototype(&Bindings::ensure_web_prototype<Bindings::CloseEventPrototype>(realm, "CloseEvent"));
+
+    return {};
 }
 
 }

Userland/Libraries/LibWeb/HTML/CloseEvent.h

@@ -33,7 +33,7 @@ public:
 private:
     CloseEvent(JS::Realm&, DeprecatedFlyString const& event_name, CloseEventInit const& event_init);
 
-    virtual void initialize(JS::Realm&) override;
+    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
 
     bool m_was_clean { false };
     u16 m_code { 0 };

Userland/Libraries/LibWeb/HTML/DOMParser.cpp

@@ -25,10 +25,12 @@ DOMParser::DOMParser(JS::Realm& realm)
 
 DOMParser::~DOMParser() = default;
 
-void DOMParser::initialize(JS::Realm& realm)
+JS::ThrowCompletionOr<void> DOMParser::initialize(JS::Realm& realm)
 {
-    Base::initialize(realm);
+    MUST_OR_THROW_OOM(Base::initialize(realm));
     set_prototype(&Bindings::ensure_web_prototype<Bindings::DOMParserPrototype>(realm, "DOMParser"));
+
+    return {};
 }
 
 // https://html.spec.whatwg.org/multipage/dynamic-markup-insertion.html#dom-domparser-parsefromstring

Userland/Libraries/LibWeb/HTML/DOMParser.h

@@ -28,7 +28,7 @@ public:
 private:
     explicit DOMParser(JS::Realm&);
 
-    virtual void initialize(JS::Realm&) override;
+    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
 };
 
 }

Userland/Libraries/LibWeb/HTML/DOMStringMap.cpp

@@ -26,10 +26,12 @@ DOMStringMap::DOMStringMap(DOM::Element& element)
 
 DOMStringMap::~DOMStringMap() = default;
 
-void DOMStringMap::initialize(JS::Realm& realm)
+JS::ThrowCompletionOr<void> DOMStringMap::initialize(JS::Realm& realm)
 {
-    Base::initialize(realm);
+    MUST_OR_THROW_OOM(Base::initialize(realm));
     set_prototype(&Bindings::ensure_web_prototype<Bindings::DOMStringMapPrototype>(realm, "DOMStringMap"));
+
+    return {};
 }
 
 void DOMStringMap::visit_edges(Cell::Visitor& visitor)

Userland/Libraries/LibWeb/HTML/DOMStringMap.h

@@ -31,7 +31,7 @@ public:
 private:
     explicit DOMStringMap(DOM::Element&);
 
-    virtual void initialize(JS::Realm&) override;
+    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
     virtual void visit_edges(Cell::Visitor&) override;
 
     // ^LegacyPlatformObject

Userland/Libraries/LibWeb/HTML/ErrorEvent.cpp

@@ -31,10 +31,12 @@ ErrorEvent::ErrorEvent(JS::Realm& realm, DeprecatedFlyString const& event_name,
 
 ErrorEvent::~ErrorEvent() = default;
 
-void ErrorEvent::initialize(JS::Realm& realm)
+JS::ThrowCompletionOr<void> ErrorEvent::initialize(JS::Realm& realm)
 {
-    Base::initialize(realm);
+    MUST_OR_THROW_OOM(Base::initialize(realm));
     set_prototype(&Bindings::ensure_web_prototype<Bindings::ErrorEventPrototype>(realm, "ErrorEvent"));
+
+    return {};
 }
 
 void ErrorEvent::visit_edges(Cell::Visitor& visitor)

Userland/Libraries/LibWeb/HTML/ErrorEvent.h

@@ -47,7 +47,7 @@ public:
 private:
     ErrorEvent(JS::Realm&, DeprecatedFlyString const& event_name, ErrorEventInit const& event_init);
 
-    virtual void initialize(JS::Realm&) override;
+    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
     virtual void visit_edges(Cell::Visitor&) override;
 
     DeprecatedString m_message { "" };

Userland/Libraries/LibWeb/HTML/HTMLAnchorElement.cpp

@@ -20,10 +20,12 @@ HTMLAnchorElement::HTMLAnchorElement(DOM::Document& document, DOM::QualifiedName
 
 HTMLAnchorElement::~HTMLAnchorElement() = default;
 
-void HTMLAnchorElement::initialize(JS::Realm& realm)
+JS::ThrowCompletionOr<void> HTMLAnchorElement::initialize(JS::Realm& realm)
 {
-    Base::initialize(realm);
+    MUST_OR_THROW_OOM(Base::initialize(realm));
     set_prototype(&Bindings::ensure_web_prototype<Bindings::HTMLAnchorElementPrototype>(realm, "HTMLAnchorElement"));
+
+    return {};
 }
 
 void HTMLAnchorElement::parse_attribute(DeprecatedFlyString const& name, DeprecatedString const& value)

Userland/Libraries/LibWeb/HTML/HTMLAnchorElement.h

@@ -32,7 +32,7 @@ public:
 private:
     HTMLAnchorElement(DOM::Document&, DOM::QualifiedName);
 
-    virtual void initialize(JS::Realm&) override;
+    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
 
     void run_activation_behavior(Web::DOM::Event const&);
 

Userland/Libraries/LibWeb/HTML/HTMLAreaElement.cpp

@@ -17,10 +17,12 @@ HTMLAreaElement::HTMLAreaElement(DOM::Document& document, DOM::QualifiedName qua
 
 HTMLAreaElement::~HTMLAreaElement() = default;
 
-void HTMLAreaElement::initialize(JS::Realm& realm)
+JS::ThrowCompletionOr<void> HTMLAreaElement::initialize(JS::Realm& realm)
 {
-    Base::initialize(realm);
+    MUST_OR_THROW_OOM(Base::initialize(realm));
     set_prototype(&Bindings::ensure_web_prototype<Bindings::HTMLAreaElementPrototype>(realm, "HTMLAreaElement"));
+
+    return {};
 }
 
 void HTMLAreaElement::parse_attribute(DeprecatedFlyString const& name, DeprecatedString const& value)

Userland/Libraries/LibWeb/HTML/HTMLAreaElement.h

@@ -23,7 +23,7 @@ public:
 private:
     HTMLAreaElement(DOM::Document&, DOM::QualifiedName);
 
-    virtual void initialize(JS::Realm&) override;
+    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
 
     // ^DOM::Element
     virtual void parse_attribute(DeprecatedFlyString const& name, DeprecatedString const& value) override;

Userland/Libraries/LibWeb/HTML/HTMLAudioElement.cpp

@@ -16,10 +16,12 @@ HTMLAudioElement::HTMLAudioElement(DOM::Document& document, DOM::QualifiedName q
 
 HTMLAudioElement::~HTMLAudioElement() = default;
 
-void HTMLAudioElement::initialize(JS::Realm& realm)
+JS::ThrowCompletionOr<void> HTMLAudioElement::initialize(JS::Realm& realm)
 {
-    Base::initialize(realm);
+    MUST_OR_THROW_OOM(Base::initialize(realm));
     set_prototype(&Bindings::ensure_web_prototype<Bindings::HTMLAudioElementPrototype>(realm, "HTMLAudioElement"));
+
+    return {};
 }
 
 }

Userland/Libraries/LibWeb/HTML/HTMLAudioElement.h

@@ -19,7 +19,7 @@ public:
 private:
     HTMLAudioElement(DOM::Document&, DOM::QualifiedName);
 
-    virtual void initialize(JS::Realm&) override;
+    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
 };
 
 }

Userland/Libraries/LibWeb/HTML/HTMLBRElement.cpp

@@ -17,10 +17,12 @@ HTMLBRElement::HTMLBRElement(DOM::Document& document, DOM::QualifiedName qualifi
 
 HTMLBRElement::~HTMLBRElement() = default;
 
-void HTMLBRElement::initialize(JS::Realm& realm)
+JS::ThrowCompletionOr<void> HTMLBRElement::initialize(JS::Realm& realm)
 {
-    Base::initialize(realm);
+    MUST_OR_THROW_OOM(Base::initialize(realm));
     set_prototype(&Bindings::ensure_web_prototype<Bindings::HTMLBRElementPrototype>(realm, "HTMLBRElement"));
+
+    return {};
 }
 
 JS::GCPtr<Layout::Node> HTMLBRElement::create_layout_node(NonnullRefPtr<CSS::StyleProperties> style)

Userland/Libraries/LibWeb/HTML/HTMLBRElement.h

@@ -21,7 +21,7 @@ public:
 private:
     HTMLBRElement(DOM::Document&, DOM::QualifiedName);
 
-    virtual void initialize(JS::Realm&) override;
+    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
 };
 
 }

Userland/Libraries/LibWeb/HTML/HTMLBaseElement.cpp

@@ -16,10 +16,12 @@ HTMLBaseElement::HTMLBaseElement(DOM::Document& document, DOM::QualifiedName qua
 
 HTMLBaseElement::~HTMLBaseElement() = default;
 
-void HTMLBaseElement::initialize(JS::Realm& realm)
+JS::ThrowCompletionOr<void> HTMLBaseElement::initialize(JS::Realm& realm)
 {
-    Base::initialize(realm);
+    MUST_OR_THROW_OOM(Base::initialize(realm));
     set_prototype(&Bindings::ensure_web_prototype<Bindings::HTMLBaseElementPrototype>(realm, "HTMLBaseElement"));
+
+    return {};
 }
 
 void HTMLBaseElement::inserted()

Userland/Libraries/LibWeb/HTML/HTMLBaseElement.h

@@ -28,7 +28,7 @@ public:
 private:
     HTMLBaseElement(DOM::Document&, DOM::QualifiedName);
 
-    virtual void initialize(JS::Realm&) override;
+    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
     virtual bool is_html_base_element() const override { return true; }
 
     // https://html.spec.whatwg.org/multipage/semantics.html#frozen-base-url

Userland/Libraries/LibWeb/HTML/HTMLBodyElement.cpp

@@ -19,10 +19,12 @@ HTMLBodyElement::HTMLBodyElement(DOM::Document& document, DOM::QualifiedName qua
 
 HTMLBodyElement::~HTMLBodyElement() = default;
 
-void HTMLBodyElement::initialize(JS::Realm& realm)
+JS::ThrowCompletionOr<void> HTMLBodyElement::initialize(JS::Realm& realm)
 {
-    Base::initialize(realm);
+    MUST_OR_THROW_OOM(Base::initialize(realm));
     set_prototype(&Bindings::ensure_web_prototype<Bindings::HTMLBodyElementPrototype>(realm, "HTMLBodyElement"));
+
+    return {};
 }
 
 void HTMLBodyElement::apply_presentational_hints(CSS::StyleProperties& style) const

Userland/Libraries/LibWeb/HTML/HTMLBodyElement.h

@@ -29,7 +29,7 @@ public:
 private:
     HTMLBodyElement(DOM::Document&, DOM::QualifiedName);
 
-    virtual void initialize(JS::Realm&) override;
+    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
 
     // ^HTML::GlobalEventHandlers
     virtual EventTarget& global_event_handlers_to_event_target(DeprecatedFlyString const& event_name) override;

Userland/Libraries/LibWeb/HTML/HTMLButtonElement.cpp

@@ -51,10 +51,12 @@ HTMLButtonElement::HTMLButtonElement(DOM::Document& document, DOM::QualifiedName
 
 HTMLButtonElement::~HTMLButtonElement() = default;
 
-void HTMLButtonElement::initialize(JS::Realm& realm)
+JS::ThrowCompletionOr<void> HTMLButtonElement::initialize(JS::Realm& realm)
 {
-    Base::initialize(realm);
+    MUST_OR_THROW_OOM(Base::initialize(realm));
     set_prototype(&Bindings::ensure_web_prototype<Bindings::HTMLButtonElementPrototype>(realm, "HTMLButtonElement"));
+
+    return {};
 }
 
 DeprecatedString HTMLButtonElement::type() const

Userland/Libraries/LibWeb/HTML/HTMLButtonElement.h

@@ -26,7 +26,7 @@ class HTMLButtonElement final
 public:
     virtual ~HTMLButtonElement() override;
 
-    virtual void initialize(JS::Realm&) override;
+    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
 
     enum class TypeAttributeState {
 #define __ENUMERATE_HTML_BUTTON_TYPE_ATTRIBUTE(_, state) state,

Userland/Libraries/LibWeb/HTML/HTMLCanvasElement.cpp

@@ -25,10 +25,12 @@ HTMLCanvasElement::HTMLCanvasElement(DOM::Document& document, DOM::QualifiedName
 
 HTMLCanvasElement::~HTMLCanvasElement() = default;
 
-void HTMLCanvasElement::initialize(JS::Realm& realm)
+JS::ThrowCompletionOr<void> HTMLCanvasElement::initialize(JS::Realm& realm)
 {
-    Base::initialize(realm);
+    MUST_OR_THROW_OOM(Base::initialize(realm));
     set_prototype(&Bindings::ensure_web_prototype<Bindings::HTMLCanvasElementPrototype>(realm, "HTMLCanvasElement"));
+
+    return {};
 }
 
 void HTMLCanvasElement::visit_edges(Cell::Visitor& visitor)

Userland/Libraries/LibWeb/HTML/HTMLCanvasElement.h

@@ -40,7 +40,7 @@ public:
 private:
     HTMLCanvasElement(DOM::Document&, DOM::QualifiedName);
 
-    virtual void initialize(JS::Realm&) override;
+    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
     virtual void visit_edges(Cell::Visitor&) override;
 
     virtual JS::GCPtr<Layout::Node> create_layout_node(NonnullRefPtr<CSS::StyleProperties>) override;

Userland/Libraries/LibWeb/HTML/HTMLDListElement.cpp

@@ -16,10 +16,12 @@ HTMLDListElement::HTMLDListElement(DOM::Document& document, DOM::QualifiedName q
 
 HTMLDListElement::~HTMLDListElement() = default;
 
-void HTMLDListElement::initialize(JS::Realm& realm)
+JS::ThrowCompletionOr<void> HTMLDListElement::initialize(JS::Realm& realm)
 {
-    Base::initialize(realm);
+    MUST_OR_THROW_OOM(Base::initialize(realm));
     set_prototype(&Bindings::ensure_web_prototype<Bindings::HTMLDListElementPrototype>(realm, "HTMLDListElement"));
+
+    return {};
 }
 
 }

Userland/Libraries/LibWeb/HTML/HTMLDListElement.h

@@ -19,7 +19,7 @@ public:
 private:
     HTMLDListElement(DOM::Document&, DOM::QualifiedName);
 
-    virtual void initialize(JS::Realm&) override;
+    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
 };
 
 }

Userland/Libraries/LibWeb/HTML/HTMLDataElement.cpp

@@ -16,10 +16,12 @@ HTMLDataElement::HTMLDataElement(DOM::Document& document, DOM::QualifiedName qua
 
 HTMLDataElement::~HTMLDataElement() = default;
 
-void HTMLDataElement::initialize(JS::Realm& realm)
+JS::ThrowCompletionOr<void> HTMLDataElement::initialize(JS::Realm& realm)
 {
-    Base::initialize(realm);
+    MUST_OR_THROW_OOM(Base::initialize(realm));
     set_prototype(&Bindings::ensure_web_prototype<Bindings::HTMLDataElementPrototype>(realm, "HTMLDataElement"));
+
+    return {};
 }
 
 }

Userland/Libraries/LibWeb/HTML/HTMLDataElement.h

@@ -23,7 +23,7 @@ public:
 private:
     HTMLDataElement(DOM::Document&, DOM::QualifiedName);
 
-    virtual void initialize(JS::Realm&) override;
+    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
 };
 
 }

Userland/Libraries/LibWeb/HTML/HTMLDataListElement.cpp

@@ -16,10 +16,12 @@ HTMLDataListElement::HTMLDataListElement(DOM::Document& document, DOM::Qualified
 
 HTMLDataListElement::~HTMLDataListElement() = default;
 
-void HTMLDataListElement::initialize(JS::Realm& realm)
+JS::ThrowCompletionOr<void> HTMLDataListElement::initialize(JS::Realm& realm)
 {
-    Base::initialize(realm);
+    MUST_OR_THROW_OOM(Base::initialize(realm));
     set_prototype(&Bindings::ensure_web_prototype<Bindings::HTMLDataListElementPrototype>(realm, "HTMLDataListElement"));
+
+    return {};
 }
 
 }

Userland/Libraries/LibWeb/HTML/HTMLDataListElement.h

@@ -22,7 +22,7 @@ public:
 private:
     HTMLDataListElement(DOM::Document&, DOM::QualifiedName);
 
-    virtual void initialize(JS::Realm&) override;
+    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
 };
 
 }

Userland/Libraries/LibWeb/HTML/HTMLDetailsElement.cpp

@@ -16,10 +16,12 @@ HTMLDetailsElement::HTMLDetailsElement(DOM::Document& document, DOM::QualifiedNa
 
 HTMLDetailsElement::~HTMLDetailsElement() = default;
 
-void HTMLDetailsElement::initialize(JS::Realm& realm)
+JS::ThrowCompletionOr<void> HTMLDetailsElement::initialize(JS::Realm& realm)
 {
-    Base::initialize(realm);
+    MUST_OR_THROW_OOM(Base::initialize(realm));
     set_prototype(&Bindings::ensure_web_prototype<Bindings::HTMLDetailsElementPrototype>(realm, "HTMLDetailsElement"));
+
+    return {};
 }
 
 }

Userland/Libraries/LibWeb/HTML/HTMLDetailsElement.h

@@ -23,7 +23,7 @@ public:
 private:
     HTMLDetailsElement(DOM::Document&, DOM::QualifiedName);
 
-    virtual void initialize(JS::Realm&) override;
+    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
 };
 
 }

Userland/Libraries/LibWeb/HTML/HTMLDialogElement.cpp

@@ -16,10 +16,12 @@ HTMLDialogElement::HTMLDialogElement(DOM::Document& document, DOM::QualifiedName
 
 HTMLDialogElement::~HTMLDialogElement() = default;
 
-void HTMLDialogElement::initialize(JS::Realm& realm)
+JS::ThrowCompletionOr<void> HTMLDialogElement::initialize(JS::Realm& realm)
 {
-    Base::initialize(realm);
+    MUST_OR_THROW_OOM(Base::initialize(realm));
     set_prototype(&Bindings::ensure_web_prototype<Bindings::HTMLDialogElementPrototype>(realm, "HTMLDialogElement"));
+
+    return {};
 }
 
 }

Userland/Libraries/LibWeb/HTML/HTMLDialogElement.h

@@ -23,7 +23,7 @@ public:
 private:
     HTMLDialogElement(DOM::Document&, DOM::QualifiedName);
 
-    virtual void initialize(JS::Realm&) override;
+    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
 };
 
 }

Userland/Libraries/LibWeb/HTML/HTMLDirectoryElement.cpp

@@ -16,10 +16,12 @@ HTMLDirectoryElement::HTMLDirectoryElement(DOM::Document& document, DOM::Qualifi
 
 HTMLDirectoryElement::~HTMLDirectoryElement() = default;
 
-void HTMLDirectoryElement::initialize(JS::Realm& realm)
+JS::ThrowCompletionOr<void> HTMLDirectoryElement::initialize(JS::Realm& realm)
 {
-    Base::initialize(realm);
+    MUST_OR_THROW_OOM(Base::initialize(realm));
     set_prototype(&Bindings::ensure_web_prototype<Bindings::HTMLDirectoryElementPrototype>(realm, "HTMLDirectoryElement"));
+
+    return {};
 }
 
 }

Userland/Libraries/LibWeb/HTML/HTMLDirectoryElement.h

@@ -20,7 +20,7 @@ public:
 private:
     HTMLDirectoryElement(DOM::Document&, DOM::QualifiedName);
 
-    virtual void initialize(JS::Realm&) override;
+    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
 };
 
 }

Userland/Libraries/LibWeb/HTML/HTMLDivElement.cpp

@@ -16,10 +16,12 @@ HTMLDivElement::HTMLDivElement(DOM::Document& document, DOM::QualifiedName quali
 
 HTMLDivElement::~HTMLDivElement() = default;
 
-void HTMLDivElement::initialize(JS::Realm& realm)
+JS::ThrowCompletionOr<void> HTMLDivElement::initialize(JS::Realm& realm)
 {
-    Base::initialize(realm);
+    MUST_OR_THROW_OOM(Base::initialize(realm));
     set_prototype(&Bindings::ensure_web_prototype<Bindings::HTMLDivElementPrototype>(realm, "HTMLDivElement"));
+
+    return {};
 }
 
 }

Userland/Libraries/LibWeb/HTML/HTMLDivElement.h

@@ -23,7 +23,7 @@ public:
 private:
     HTMLDivElement(DOM::Document&, DOM::QualifiedName);
 
-    virtual void initialize(JS::Realm&) override;
+    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
 };
 
 }

Userland/Libraries/LibWeb/HTML/HTMLElement.cpp

@@ -40,12 +40,14 @@ HTMLElement::HTMLElement(DOM::Document& document, DOM::QualifiedName qualified_n
 
 HTMLElement::~HTMLElement() = default;
 
-void HTMLElement::initialize(JS::Realm& realm)
+JS::ThrowCompletionOr<void> HTMLElement::initialize(JS::Realm& realm)
 {
-    Base::initialize(realm);
+    MUST_OR_THROW_OOM(Base::initialize(realm));
     set_prototype(&Bindings::ensure_web_prototype<Bindings::HTMLElementPrototype>(realm, "HTMLElement"));
 
     m_dataset = DOMStringMap::create(*this);
+
+    return {};
 }
 
 void HTMLElement::visit_edges(Cell::Visitor& visitor)

Userland/Libraries/LibWeb/HTML/HTMLElement.h

@@ -64,7 +64,7 @@ public:
 protected:
     HTMLElement(DOM::Document&, DOM::QualifiedName);
 
-    virtual void initialize(JS::Realm&) override;
+    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
 
     virtual void parse_attribute(DeprecatedFlyString const& name, DeprecatedString const& value) override;
 

Userland/Libraries/LibWeb/HTML/HTMLEmbedElement.cpp

@@ -16,10 +16,12 @@ HTMLEmbedElement::HTMLEmbedElement(DOM::Document& document, DOM::QualifiedName q
 
 HTMLEmbedElement::~HTMLEmbedElement() = default;
 
-void HTMLEmbedElement::initialize(JS::Realm& realm)
+JS::ThrowCompletionOr<void> HTMLEmbedElement::initialize(JS::Realm& realm)
 {
-    Base::initialize(realm);
+    MUST_OR_THROW_OOM(Base::initialize(realm));
     set_prototype(&Bindings::ensure_web_prototype<Bindings::HTMLEmbedElementPrototype>(realm, "HTMLEmbedElement"));
+
+    return {};
 }
 
 }

Userland/Libraries/LibWeb/HTML/HTMLEmbedElement.h

@@ -19,7 +19,7 @@ public:
 private:
     HTMLEmbedElement(DOM::Document&, DOM::QualifiedName);
 
-    virtual void initialize(JS::Realm&) override;
+    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
 };
 
 }

Userland/Libraries/LibWeb/HTML/HTMLFieldSetElement.cpp

@@ -17,10 +17,12 @@ HTMLFieldSetElement::HTMLFieldSetElement(DOM::Document& document, DOM::Qualified
 
 HTMLFieldSetElement::~HTMLFieldSetElement() = default;
 
-void HTMLFieldSetElement::initialize(JS::Realm& realm)
+JS::ThrowCompletionOr<void> HTMLFieldSetElement::initialize(JS::Realm& realm)
 {
-    Base::initialize(realm);
+    MUST_OR_THROW_OOM(Base::initialize(realm));
     set_prototype(&Bindings::ensure_web_prototype<Bindings::HTMLFieldSetElementPrototype>(realm, "HTMLFieldSetElement"));
+
+    return {};
 }
 
 // https://html.spec.whatwg.org/multipage/form-elements.html#concept-fieldset-disabled

Userland/Libraries/LibWeb/HTML/HTMLFieldSetElement.h

@@ -41,7 +41,7 @@ public:
 private:
     HTMLFieldSetElement(DOM::Document&, DOM::QualifiedName);
 
-    virtual void initialize(JS::Realm&) override;
+    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
 };
 
 }

Userland/Libraries/LibWeb/HTML/HTMLFontElement.cpp

@@ -18,10 +18,12 @@ HTMLFontElement::HTMLFontElement(DOM::Document& document, DOM::QualifiedName qua
 
 HTMLFontElement::~HTMLFontElement() = default;
 
-void HTMLFontElement::initialize(JS::Realm& realm)
+JS::ThrowCompletionOr<void> HTMLFontElement::initialize(JS::Realm& realm)
 {
-    Base::initialize(realm);
+    MUST_OR_THROW_OOM(Base::initialize(realm));
     set_prototype(&Bindings::ensure_web_prototype<Bindings::HTMLFontElementPrototype>(realm, "HTMLFontElement"));
+
+    return {};
 }
 
 void HTMLFontElement::apply_presentational_hints(CSS::StyleProperties& style) const

Userland/Libraries/LibWeb/HTML/HTMLFontElement.h

@@ -21,7 +21,7 @@ public:
 private:
     HTMLFontElement(DOM::Document&, DOM::QualifiedName);
 
-    virtual void initialize(JS::Realm&) override;
+    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
 };
 
 }

Userland/Libraries/LibWeb/HTML/HTMLFormElement.cpp

@@ -30,10 +30,12 @@ HTMLFormElement::HTMLFormElement(DOM::Document& document, DOM::QualifiedName qua
 
 HTMLFormElement::~HTMLFormElement() = default;
 
-void HTMLFormElement::initialize(JS::Realm& realm)
+JS::ThrowCompletionOr<void> HTMLFormElement::initialize(JS::Realm& realm)
 {
-    Base::initialize(realm);
+    MUST_OR_THROW_OOM(Base::initialize(realm));
     set_prototype(&Bindings::ensure_web_prototype<Bindings::HTMLFormElementPrototype>(realm, "HTMLFormElement"));
+
+    return {};
 }
 
 void HTMLFormElement::visit_edges(Cell::Visitor& visitor)

Userland/Libraries/LibWeb/HTML/HTMLFormElement.h

@@ -43,7 +43,7 @@ public:
 private:
     HTMLFormElement(DOM::Document&, DOM::QualifiedName);
 
-    virtual void initialize(JS::Realm&) override;
+    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
     virtual void visit_edges(Cell::Visitor&) override;
 
     bool m_firing_submission_events { false };

Userland/Libraries/LibWeb/HTML/HTMLFrameElement.cpp

@@ -16,10 +16,12 @@ HTMLFrameElement::HTMLFrameElement(DOM::Document& document, DOM::QualifiedName q
 
 HTMLFrameElement::~HTMLFrameElement() = default;
 
-void HTMLFrameElement::initialize(JS::Realm& realm)
+JS::ThrowCompletionOr<void> HTMLFrameElement::initialize(JS::Realm& realm)
 {
-    Base::initialize(realm);
+    MUST_OR_THROW_OOM(Base::initialize(realm));
     set_prototype(&Bindings::ensure_web_prototype<Bindings::HTMLFrameElementPrototype>(realm, "HTMLFrameElement"));
+
+    return {};
 }
 
 // https://html.spec.whatwg.org/multipage/interaction.html#dom-tabindex

Userland/Libraries/LibWeb/HTML/HTMLFrameElement.h

@@ -20,7 +20,7 @@ public:
 private:
     HTMLFrameElement(DOM::Document&, DOM::QualifiedName);
 
-    virtual void initialize(JS::Realm&) override;
+    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
 
     // ^DOM::Element
     virtual i32 default_tab_index_value() const override;

Userland/Libraries/LibWeb/HTML/HTMLFrameSetElement.cpp

@@ -17,10 +17,12 @@ HTMLFrameSetElement::HTMLFrameSetElement(DOM::Document& document, DOM::Qualified
 
 HTMLFrameSetElement::~HTMLFrameSetElement() = default;
 
-void HTMLFrameSetElement::initialize(JS::Realm& realm)
+JS::ThrowCompletionOr<void> HTMLFrameSetElement::initialize(JS::Realm& realm)
 {
-    Base::initialize(realm);
+    MUST_OR_THROW_OOM(Base::initialize(realm));
     set_prototype(&Bindings::ensure_web_prototype<Bindings::HTMLFrameSetElementPrototype>(realm, "HTMLFrameSetElement"));
+
+    return {};
 }
 
 void HTMLFrameSetElement::parse_attribute(DeprecatedFlyString const& name, DeprecatedString const& value)

Userland/Libraries/LibWeb/HTML/HTMLFrameSetElement.h

@@ -23,7 +23,7 @@ public:
 private:
     HTMLFrameSetElement(DOM::Document&, DOM::QualifiedName);
 
-    virtual void initialize(JS::Realm&) override;
+    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
     virtual void parse_attribute(DeprecatedFlyString const&, DeprecatedString const&) override;
 
     // ^HTML::GlobalEventHandlers

Userland/Libraries/LibWeb/HTML/HTMLHRElement.cpp

@@ -16,10 +16,12 @@ HTMLHRElement::HTMLHRElement(DOM::Document& document, DOM::QualifiedName qualifi
 
 HTMLHRElement::~HTMLHRElement() = default;
 
-void HTMLHRElement::initialize(JS::Realm& realm)
+JS::ThrowCompletionOr<void> HTMLHRElement::initialize(JS::Realm& realm)
 {
-    Base::initialize(realm);
+    MUST_OR_THROW_OOM(Base::initialize(realm));
     set_prototype(&Bindings::ensure_web_prototype<Bindings::HTMLHRElementPrototype>(realm, "HTMLHRElement"));
+
+    return {};
 }
 
 }

Userland/Libraries/LibWeb/HTML/HTMLHRElement.h

@@ -23,7 +23,7 @@ public:
 private:
     HTMLHRElement(DOM::Document&, DOM::QualifiedName);
 
-    virtual void initialize(JS::Realm&) override;
+    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
 };
 
 }

Userland/Libraries/LibWeb/HTML/HTMLHeadElement.cpp

@@ -16,10 +16,12 @@ HTMLHeadElement::HTMLHeadElement(DOM::Document& document, DOM::QualifiedName qua
 
 HTMLHeadElement::~HTMLHeadElement() = default;
 
-void HTMLHeadElement::initialize(JS::Realm& realm)
+JS::ThrowCompletionOr<void> HTMLHeadElement::initialize(JS::Realm& realm)
 {
-    Base::initialize(realm);
+    MUST_OR_THROW_OOM(Base::initialize(realm));
     set_prototype(&Bindings::ensure_web_prototype<Bindings::HTMLHeadElementPrototype>(realm, "HTMLHeadElement"));
+
+    return {};
 }
 
 }

Userland/Libraries/LibWeb/HTML/HTMLHeadElement.h

@@ -19,7 +19,7 @@ public:
 private:
     HTMLHeadElement(DOM::Document&, DOM::QualifiedName);
 
-    virtual void initialize(JS::Realm&) override;
+    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
 };
 
 }

Userland/Libraries/LibWeb/HTML/HTMLHeadingElement.cpp

@@ -16,10 +16,12 @@ HTMLHeadingElement::HTMLHeadingElement(DOM::Document& document, DOM::QualifiedNa
 
 HTMLHeadingElement::~HTMLHeadingElement() = default;
 
-void HTMLHeadingElement::initialize(JS::Realm& realm)
+JS::ThrowCompletionOr<void> HTMLHeadingElement::initialize(JS::Realm& realm)
 {
-    Base::initialize(realm);
+    MUST_OR_THROW_OOM(Base::initialize(realm));
     set_prototype(&Bindings::ensure_web_prototype<Bindings::HTMLHeadingElementPrototype>(realm, "HTMLHeadingElement"));
+
+    return {};
 }
 
 // https://html.spec.whatwg.org/multipage/rendering.html#tables-2

Userland/Libraries/LibWeb/HTML/HTMLHeadingElement.h

@@ -31,7 +31,7 @@ public:
 private:
     HTMLHeadingElement(DOM::Document&, DOM::QualifiedName);
 
-    virtual void initialize(JS::Realm&) override;
+    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
 };
 
 }

Userland/Libraries/LibWeb/HTML/HTMLHtmlElement.cpp

@@ -16,10 +16,12 @@ HTMLHtmlElement::HTMLHtmlElement(DOM::Document& document, DOM::QualifiedName qua
 
 HTMLHtmlElement::~HTMLHtmlElement() = default;
 
-void HTMLHtmlElement::initialize(JS::Realm& realm)
+JS::ThrowCompletionOr<void> HTMLHtmlElement::initialize(JS::Realm& realm)
 {
-    Base::initialize(realm);
+    MUST_OR_THROW_OOM(Base::initialize(realm));
     set_prototype(&Bindings::ensure_web_prototype<Bindings::HTMLHtmlElementPrototype>(realm, "HTMLHtmlElement"));
+
+    return {};
 }
 
 bool HTMLHtmlElement::should_use_body_background_properties() const

Userland/Libraries/LibWeb/HTML/HTMLHtmlElement.h

@@ -25,7 +25,7 @@ public:
 private:
     HTMLHtmlElement(DOM::Document&, DOM::QualifiedName);
 
-    virtual void initialize(JS::Realm&) override;
+    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
     virtual bool is_html_html_element() const override { return true; }
 };
 

Userland/Libraries/LibWeb/HTML/HTMLIFrameElement.cpp

@@ -21,10 +21,12 @@ HTMLIFrameElement::HTMLIFrameElement(DOM::Document& document, DOM::QualifiedName
 
 HTMLIFrameElement::~HTMLIFrameElement() = default;
 
-void HTMLIFrameElement::initialize(JS::Realm& realm)
+JS::ThrowCompletionOr<void> HTMLIFrameElement::initialize(JS::Realm& realm)
 {
-    Base::initialize(realm);
+    MUST_OR_THROW_OOM(Base::initialize(realm));
     set_prototype(&Bindings::ensure_web_prototype<Bindings::HTMLIFrameElementPrototype>(realm, "HTMLIFrameElement"));
+
+    return {};
 }
 
 JS::GCPtr<Layout::Node> HTMLIFrameElement::create_layout_node(NonnullRefPtr<CSS::StyleProperties> style)

Userland/Libraries/LibWeb/HTML/HTMLIFrameElement.h

@@ -28,7 +28,7 @@ public:
 private:
     HTMLIFrameElement(DOM::Document&, DOM::QualifiedName);
 
-    virtual void initialize(JS::Realm&) override;
+    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
 
     // ^DOM::Element
     virtual void inserted() override;

Userland/Libraries/LibWeb/HTML/HTMLImageElement.cpp

@@ -48,10 +48,12 @@ HTMLImageElement::HTMLImageElement(DOM::Document& document, DOM::QualifiedName q
 
 HTMLImageElement::~HTMLImageElement() = default;
 
-void HTMLImageElement::initialize(JS::Realm& realm)
+JS::ThrowCompletionOr<void> HTMLImageElement::initialize(JS::Realm& realm)
 {
-    Base::initialize(realm);
+    MUST_OR_THROW_OOM(Base::initialize(realm));
     set_prototype(&Bindings::ensure_web_prototype<Bindings::HTMLImageElementPrototype>(realm, "HTMLImageElement"));
+
+    return {};
 }
 
 void HTMLImageElement::apply_presentational_hints(CSS::StyleProperties& style) const

Userland/Libraries/LibWeb/HTML/HTMLImageElement.h

@@ -48,7 +48,7 @@ public:
 private:
     HTMLImageElement(DOM::Document&, DOM::QualifiedName);
 
-    virtual void initialize(JS::Realm&) override;
+    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
     virtual void apply_presentational_hints(CSS::StyleProperties&) const override;
 
     virtual JS::GCPtr<Layout::Node> create_layout_node(NonnullRefPtr<CSS::StyleProperties>) override;

Userland/Libraries/LibWeb/HTML/HTMLInputElement.cpp

@@ -41,10 +41,12 @@ HTMLInputElement::HTMLInputElement(DOM::Document& document, DOM::QualifiedName q
 
 HTMLInputElement::~HTMLInputElement() = default;
 
-void HTMLInputElement::initialize(JS::Realm& realm)
+JS::ThrowCompletionOr<void> HTMLInputElement::initialize(JS::Realm& realm)
 {
-    Base::initialize(realm);
+    MUST_OR_THROW_OOM(Base::initialize(realm));
     set_prototype(&Bindings::ensure_web_prototype<Bindings::HTMLInputElementPrototype>(realm, "HTMLInputElement"));
+
+    return {};
 }
 
 void HTMLInputElement::visit_edges(Cell::Visitor& visitor)

Userland/Libraries/LibWeb/HTML/HTMLInputElement.h

@@ -134,7 +134,7 @@ private:
     // ^DOM::Element
     virtual i32 default_tab_index_value() const override;
 
-    virtual void initialize(JS::Realm&) override;
+    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
     virtual void visit_edges(Cell::Visitor&) override;
 
     static TypeAttributeState parse_type_attribute(StringView);

Userland/Libraries/LibWeb/HTML/HTMLLIElement.cpp

@@ -16,10 +16,12 @@ HTMLLIElement::HTMLLIElement(DOM::Document& document, DOM::QualifiedName qualifi
 
 HTMLLIElement::~HTMLLIElement() = default;
 
-void HTMLLIElement::initialize(JS::Realm& realm)
+JS::ThrowCompletionOr<void> HTMLLIElement::initialize(JS::Realm& realm)
 {
-    Base::initialize(realm);
+    MUST_OR_THROW_OOM(Base::initialize(realm));
     set_prototype(&Bindings::ensure_web_prototype<Bindings::HTMLLIElementPrototype>(realm, "HTMLLIElement"));
+
+    return {};
 }
 
 }

Userland/Libraries/LibWeb/HTML/HTMLLIElement.h

@@ -23,7 +23,7 @@ public:
 private:
     HTMLLIElement(DOM::Document&, DOM::QualifiedName);
 
-    virtual void initialize(JS::Realm&) override;
+    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
 };
 
 }

Userland/Libraries/LibWeb/HTML/HTMLLabelElement.cpp

@@ -17,10 +17,12 @@ HTMLLabelElement::HTMLLabelElement(DOM::Document& document, DOM::QualifiedName q
 
 HTMLLabelElement::~HTMLLabelElement() = default;
 
-void HTMLLabelElement::initialize(JS::Realm& realm)
+JS::ThrowCompletionOr<void> HTMLLabelElement::initialize(JS::Realm& realm)
 {
-    Base::initialize(realm);
+    MUST_OR_THROW_OOM(Base::initialize(realm));
     set_prototype(&Bindings::ensure_web_prototype<Bindings::HTMLLabelElementPrototype>(realm, "HTMLLabelElement"));
+
+    return {};
 }
 
 JS::GCPtr<Layout::Node> HTMLLabelElement::create_layout_node(NonnullRefPtr<CSS::StyleProperties> style)

Userland/Libraries/LibWeb/HTML/HTMLLabelElement.h

@@ -23,7 +23,7 @@ public:
 private:
     HTMLLabelElement(DOM::Document&, DOM::QualifiedName);
 
-    virtual void initialize(JS::Realm&) override;
+    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
 };
 
 }

Userland/Libraries/LibWeb/HTML/HTMLLegendElement.cpp

@@ -16,10 +16,12 @@ HTMLLegendElement::HTMLLegendElement(DOM::Document& document, DOM::QualifiedName
 
 HTMLLegendElement::~HTMLLegendElement() = default;
 
-void HTMLLegendElement::initialize(JS::Realm& realm)
+JS::ThrowCompletionOr<void> HTMLLegendElement::initialize(JS::Realm& realm)
 {
-    Base::initialize(realm);
+    MUST_OR_THROW_OOM(Base::initialize(realm));
     set_prototype(&Bindings::ensure_web_prototype<Bindings::HTMLLegendElementPrototype>(realm, "HTMLLegendElement"));
+
+    return {};
 }
 
 }

Userland/Libraries/LibWeb/HTML/HTMLLegendElement.h

@@ -19,7 +19,7 @@ public:
 private:
     HTMLLegendElement(DOM::Document&, DOM::QualifiedName);
 
-    virtual void initialize(JS::Realm&) override;
+    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
 };
 
 }

Userland/Libraries/LibWeb/HTML/HTMLLinkElement.cpp

@@ -26,10 +26,12 @@ HTMLLinkElement::HTMLLinkElement(DOM::Document& document, DOM::QualifiedName qua
 
 HTMLLinkElement::~HTMLLinkElement() = default;
 
-void HTMLLinkElement::initialize(JS::Realm& realm)
+JS::ThrowCompletionOr<void> HTMLLinkElement::initialize(JS::Realm& realm)
 {
-    Base::initialize(realm);
+    MUST_OR_THROW_OOM(Base::initialize(realm));
     set_prototype(&Bindings::ensure_web_prototype<Bindings::HTMLLinkElementPrototype>(realm, "HTMLLinkElement"));
+
+    return {};
 }
 
 void HTMLLinkElement::inserted()

Userland/Libraries/LibWeb/HTML/HTMLLinkElement.h

@@ -33,7 +33,7 @@ public:
 private:
     HTMLLinkElement(DOM::Document&, DOM::QualifiedName);
 
-    virtual void initialize(JS::Realm&) override;
+    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
     void parse_attribute(DeprecatedFlyString const&, DeprecatedString const&) override;
 
     // ^ResourceClient

Userland/Libraries/LibWeb/HTML/HTMLMapElement.cpp

@@ -16,10 +16,12 @@ HTMLMapElement::HTMLMapElement(DOM::Document& document, DOM::QualifiedName quali
 
 HTMLMapElement::~HTMLMapElement() = default;
 
-void HTMLMapElement::initialize(JS::Realm& realm)
+JS::ThrowCompletionOr<void> HTMLMapElement::initialize(JS::Realm& realm)
 {
-    Base::initialize(realm);
+    MUST_OR_THROW_OOM(Base::initialize(realm));
     set_prototype(&Bindings::ensure_web_prototype<Bindings::HTMLMapElementPrototype>(realm, "HTMLMapElement"));
+
+    return {};
 }
 
 }

Userland/Libraries/LibWeb/HTML/HTMLMapElement.h

@@ -19,7 +19,7 @@ public:
 private:
     HTMLMapElement(DOM::Document&, DOM::QualifiedName);
 
-    virtual void initialize(JS::Realm&) override;
+    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
 };
 
 }

Userland/Libraries/LibWeb/HTML/HTMLMarqueeElement.cpp

@@ -16,10 +16,12 @@ HTMLMarqueeElement::HTMLMarqueeElement(DOM::Document& document, DOM::QualifiedNa
 
 HTMLMarqueeElement::~HTMLMarqueeElement() = default;
 
-void HTMLMarqueeElement::initialize(JS::Realm& realm)
+JS::ThrowCompletionOr<void> HTMLMarqueeElement::initialize(JS::Realm& realm)
 {
-    Base::initialize(realm);
+    MUST_OR_THROW_OOM(Base::initialize(realm));
     set_prototype(&Bindings::ensure_web_prototype<Bindings::HTMLMarqueeElementPrototype>(realm, "HTMLMarqueeElement"));
+
+    return {};
 }
 
 void HTMLMarqueeElement::apply_presentational_hints(CSS::StyleProperties& style) const

Userland/Libraries/LibWeb/HTML/HTMLMarqueeElement.h

@@ -20,7 +20,7 @@ public:
 private:
     HTMLMarqueeElement(DOM::Document&, DOM::QualifiedName);
 
-    virtual void initialize(JS::Realm&) override;
+    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
     virtual void apply_presentational_hints(CSS::StyleProperties&) const override;
 };
 

Userland/Libraries/LibWeb/HTML/HTMLMediaElement.cpp

@@ -17,10 +17,12 @@ HTMLMediaElement::HTMLMediaElement(DOM::Document& document, DOM::QualifiedName q
 
 HTMLMediaElement::~HTMLMediaElement() = default;
 
-void HTMLMediaElement::initialize(JS::Realm& realm)
+JS::ThrowCompletionOr<void> HTMLMediaElement::initialize(JS::Realm& realm)
 {
-    Base::initialize(realm);
+    MUST_OR_THROW_OOM(Base::initialize(realm));
     set_prototype(&Bindings::ensure_web_prototype<Bindings::HTMLMediaElementPrototype>(realm, "HTMLMediaElement"));
+
+    return {};
 }
 
 // https://html.spec.whatwg.org/multipage/media.html#dom-navigator-canplaytype

Userland/Libraries/LibWeb/HTML/HTMLMediaElement.h

@@ -24,7 +24,7 @@ public:
 protected:
     HTMLMediaElement(DOM::Document&, DOM::QualifiedName);
 
-    virtual void initialize(JS::Realm&) override;
+    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
 };
 
 }

Userland/Libraries/LibWeb/HTML/HTMLMenuElement.cpp

@@ -16,10 +16,12 @@ HTMLMenuElement::HTMLMenuElement(DOM::Document& document, DOM::QualifiedName qua
 
 HTMLMenuElement::~HTMLMenuElement() = default;
 
-void HTMLMenuElement::initialize(JS::Realm& realm)
+JS::ThrowCompletionOr<void> HTMLMenuElement::initialize(JS::Realm& realm)
 {
-    Base::initialize(realm);
+    MUST_OR_THROW_OOM(Base::initialize(realm));
     set_prototype(&Bindings::ensure_web_prototype<Bindings::HTMLMenuElementPrototype>(realm, "HTMLMenuElement"));
+
+    return {};
 }
 
 }

Userland/Libraries/LibWeb/HTML/HTMLMenuElement.h

@@ -23,7 +23,7 @@ public:
 private:
     HTMLMenuElement(DOM::Document&, DOM::QualifiedName);
 
-    virtual void initialize(JS::Realm&) override;
+    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
 };
 
 }

Userland/Libraries/LibWeb/HTML/HTMLMetaElement.cpp

@@ -16,10 +16,12 @@ HTMLMetaElement::HTMLMetaElement(DOM::Document& document, DOM::QualifiedName qua
 
 HTMLMetaElement::~HTMLMetaElement() = default;
 
-void HTMLMetaElement::initialize(JS::Realm& realm)
+JS::ThrowCompletionOr<void> HTMLMetaElement::initialize(JS::Realm& realm)
 {
-    Base::initialize(realm);
+    MUST_OR_THROW_OOM(Base::initialize(realm));
     set_prototype(&Bindings::ensure_web_prototype<Bindings::HTMLMetaElementPrototype>(realm, "HTMLMetaElement"));
+
+    return {};
 }
 
 }

Userland/Libraries/LibWeb/HTML/HTMLMetaElement.h

@@ -19,7 +19,7 @@ public:
 private:
     HTMLMetaElement(DOM::Document&, DOM::QualifiedName);
 
-    virtual void initialize(JS::Realm&) override;
+    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
 };
 
 }

Userland/Libraries/LibWeb/HTML/HTMLMeterElement.cpp

@@ -16,10 +16,12 @@ HTMLMeterElement::HTMLMeterElement(DOM::Document& document, DOM::QualifiedName q
 
 HTMLMeterElement::~HTMLMeterElement() = default;
 
-void HTMLMeterElement::initialize(JS::Realm& realm)
+JS::ThrowCompletionOr<void> HTMLMeterElement::initialize(JS::Realm& realm)
 {
-    Base::initialize(realm);
+    MUST_OR_THROW_OOM(Base::initialize(realm));
     set_prototype(&Bindings::ensure_web_prototype<Bindings::HTMLMeterElementPrototype>(realm, "HTMLMeterElement"));
+
+    return {};
 }
 
 }

Userland/Libraries/LibWeb/HTML/HTMLMeterElement.h

@@ -28,7 +28,7 @@ public:
 private:
     HTMLMeterElement(DOM::Document&, DOM::QualifiedName);
 
-    virtual void initialize(JS::Realm&) override;
+    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
 };
 
 }

Userland/Libraries/LibWeb/HTML/HTMLModElement.cpp

@@ -17,10 +17,12 @@ HTMLModElement::HTMLModElement(DOM::Document& document, DOM::QualifiedName quali
 
 HTMLModElement::~HTMLModElement() = default;
 
-void HTMLModElement::initialize(JS::Realm& realm)
+JS::ThrowCompletionOr<void> HTMLModElement::initialize(JS::Realm& realm)
 {
-    Base::initialize(realm);
+    MUST_OR_THROW_OOM(Base::initialize(realm));
     set_prototype(&Bindings::ensure_web_prototype<Bindings::HTMLModElementPrototype>(realm, "HTMLModElement"));
+
+    return {};
 }
 
 Optional<DOM::ARIARoles::Role> HTMLModElement::default_role() const

Userland/Libraries/LibWeb/HTML/HTMLModElement.h

@@ -22,7 +22,7 @@ public:
 private:
     HTMLModElement(DOM::Document&, DOM::QualifiedName);
 
-    virtual void initialize(JS::Realm&) override;
+    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
 };
 
 }

Userland/Libraries/LibWeb/HTML/HTMLOListElement.cpp

@@ -16,10 +16,12 @@ HTMLOListElement::HTMLOListElement(DOM::Document& document, DOM::QualifiedName q
 
 HTMLOListElement::~HTMLOListElement() = default;
 
-void HTMLOListElement::initialize(JS::Realm& realm)
+JS::ThrowCompletionOr<void> HTMLOListElement::initialize(JS::Realm& realm)
 {
-    Base::initialize(realm);
+    MUST_OR_THROW_OOM(Base::initialize(realm));
     set_prototype(&Bindings::ensure_web_prototype<Bindings::HTMLOListElementPrototype>(realm, "HTMLOListElement"));
+
+    return {};
 }
 
 }

Userland/Libraries/LibWeb/HTML/HTMLOListElement.h

@@ -23,7 +23,7 @@ public:
 private:
     HTMLOListElement(DOM::Document&, DOM::QualifiedName);
 
-    virtual void initialize(JS::Realm&) override;
+    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
 };
 
 }

Userland/Libraries/LibWeb/HTML/HTMLObjectElement.cpp

@@ -30,10 +30,12 @@ HTMLObjectElement::HTMLObjectElement(DOM::Document& document, DOM::QualifiedName
 
 HTMLObjectElement::~HTMLObjectElement() = default;
 
-void HTMLObjectElement::initialize(JS::Realm& realm)
+JS::ThrowCompletionOr<void> HTMLObjectElement::initialize(JS::Realm& realm)
 {
-    Base::initialize(realm);
+    MUST_OR_THROW_OOM(Base::initialize(realm));
     set_prototype(&Bindings::ensure_web_prototype<Bindings::HTMLObjectElementPrototype>(realm, "HTMLObjectElement"));
+
+    return {};
 }
 
 void HTMLObjectElement::parse_attribute(DeprecatedFlyString const& name, DeprecatedString const& value)

Userland/Libraries/LibWeb/HTML/HTMLObjectElement.h

@@ -46,7 +46,7 @@ public:
 private:
     HTMLObjectElement(DOM::Document&, DOM::QualifiedName);
 
-    virtual void initialize(JS::Realm&) override;
+    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
 
     virtual JS::GCPtr<Layout::Node> create_layout_node(NonnullRefPtr<CSS::StyleProperties>) override;
 

Userland/Libraries/LibWeb/HTML/HTMLOptGroupElement.cpp

@@ -16,10 +16,12 @@ HTMLOptGroupElement::HTMLOptGroupElement(DOM::Document& document, DOM::Qualified
 
 HTMLOptGroupElement::~HTMLOptGroupElement() = default;
 
-void HTMLOptGroupElement::initialize(JS::Realm& realm)
+JS::ThrowCompletionOr<void> HTMLOptGroupElement::initialize(JS::Realm& realm)
 {
-    Base::initialize(realm);
+    MUST_OR_THROW_OOM(Base::initialize(realm));
     set_prototype(&Bindings::ensure_web_prototype<Bindings::HTMLOptGroupElementPrototype>(realm, "HTMLOptGroupElement"));
+
+    return {};
 }
 
 }

Userland/Libraries/LibWeb/HTML/HTMLOptGroupElement.h

@@ -23,7 +23,7 @@ public:
 private:
     HTMLOptGroupElement(DOM::Document&, DOM::QualifiedName);
 
-    virtual void initialize(JS::Realm&) override;
+    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
 };
 
 }

Userland/Libraries/LibWeb/HTML/HTMLOptionElement.cpp

@@ -25,10 +25,12 @@ HTMLOptionElement::HTMLOptionElement(DOM::Document& document, DOM::QualifiedName
 
 HTMLOptionElement::~HTMLOptionElement() = default;
 
-void HTMLOptionElement::initialize(JS::Realm& realm)
+JS::ThrowCompletionOr<void> HTMLOptionElement::initialize(JS::Realm& realm)
 {
-    Base::initialize(realm);
+    MUST_OR_THROW_OOM(Base::initialize(realm));
     set_prototype(&Bindings::ensure_web_prototype<Bindings::HTMLOptionElementPrototype>(realm, "HTMLOptionElement"));
+
+    return {};
 }
 
 void HTMLOptionElement::parse_attribute(DeprecatedFlyString const& name, DeprecatedString const& value)

Userland/Libraries/LibWeb/HTML/HTMLOptionElement.h

@@ -38,7 +38,7 @@ private:
 
     HTMLOptionElement(DOM::Document&, DOM::QualifiedName);
 
-    virtual void initialize(JS::Realm&) override;
+    virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
 
     void parse_attribute(DeprecatedFlyString const& name, DeprecatedString const& value) override;
     void did_remove_attribute(DeprecatedFlyString const& name) override;